diff --git a/.codespellrc b/.codespellrc
new file mode 100644
index 00000000..291bd5cf
--- /dev/null
+++ b/.codespellrc
@@ -0,0 +1,3 @@
+[codespell]
+skip = tarantool/msgpack_ext/types/timezones/timezones.py
+ignore-words-list = ans,gost,ro,assertIn
diff --git a/.flake8 b/.flake8
new file mode 100644
index 00000000..4425b53d
--- /dev/null
+++ b/.flake8
@@ -0,0 +1,3 @@
+[flake8]
+# Use pylint for lines length check
+ignore=E501,W503
diff --git a/.github/workflows/packing.yml b/.github/workflows/packing.yml
index 00ef82ab..70970387 100644
--- a/.github/workflows/packing.yml
+++ b/.github/workflows/packing.yml
@@ -6,6 +6,10 @@ on:
   pull_request_target:
     types: [labeled]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 jobs:
   pack_pip:
     # We want to run on external PRs, but not on our own internal
@@ -16,14 +20,14 @@ jobs:
     if: (github.event_name == 'push') ||
       (github.event_name == 'pull_request' &&
         github.event.pull_request.head.repo.full_name != github.repository)
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
 
     strategy:
       fail-fast: false
 
     steps:
       - name: Clone the connector repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         # Checkout all tags for correct version computation.
         with:
           fetch-depth: 0
@@ -31,10 +35,12 @@ jobs:
       - name: Setup Python and basic packing tools
         uses: actions/setup-python@v4
         with:
-          python-version: '3.10'
+          python-version: '3.11'
 
       - name: Install tools for packing and verification
-        run: pip3 install wheel twine
+        run: |
+          pip3 install wheel twine
+          pip3 install --upgrade setuptools
 
       - name: Pack source and binary files
         run: make pip-dist
@@ -43,7 +49,7 @@ jobs:
         run: make pip-dist-check
 
       - name: Archive pip artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4.4.0
         with:
           name: pip_dist
           path: pip_dist
@@ -61,30 +67,30 @@ jobs:
     if: (github.event_name == 'push') ||
       (github.event_name == 'pull_request' &&
         github.event.pull_request.head.repo.full_name != github.repository)
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
 
     strategy:
       fail-fast: false
 
     steps:
       - name: Clone the connector repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Setup Python
         uses: actions/setup-python@v4
         with:
-          python-version: '3.10'
+          python-version: '3.11'
 
       - name: Remove connector source code
         run: python3 .github/scripts/remove_source_code.py
 
       - name: Install tarantool
-        uses: tarantool/setup-tarantool@v1
+        uses: tarantool/setup-tarantool@v3
         with:
-          tarantool-version: '2.10'
+          tarantool-version: '2.11'
 
       - name: Download pip package artifacts
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4.1.8
         with:
           name: pip_dist
           path: pip_dist
@@ -95,10 +101,13 @@ jobs:
       - name: Install test requirements
         run: pip3 install -r requirements-test.txt
 
+      # Installation of the specific CMake version is a hotfix for
+      # https://github.com/tarantool/checks/issues/64
       - name: Install the crud module for testing purposes
         run: |
           curl -L https://tarantool.io/release/2/installer.sh | bash
           sudo apt install -y tt
+          pip3 install cmake==3.15.3
           tt rocks install crud
 
       - name: Run tests
@@ -123,18 +132,18 @@ jobs:
 
     steps:
       - name: Clone the connector repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Setup Python
         uses: actions/setup-python@v4
         with:
-          python-version: '3.10'
+          python-version: '3.11'
 
       - name: Remove connector source code
         run: python3 .github/scripts/remove_source_code.py
 
       - name: Download pip package artifacts
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4.1.8
         with:
           name: pip_dist
           path: pip_dist
@@ -148,16 +157,16 @@ jobs:
       - name: Setup WSL for tarantool
         uses: Vampire/setup-wsl@v1
         with:
-          distribution: Ubuntu-20.04
+          distribution: Ubuntu-22.04
 
       - name: Install tarantool
-        shell: wsl-bash_Ubuntu-20.04 {0}
+        shell: wsl-bash_Ubuntu-22.04 {0}
         run: |
           curl -L https://tarantool.io/release/2/installer.sh | bash -s
           sudo apt install -y tarantool tarantool-dev
 
       - name: Setup test tarantool instance
-        shell: wsl-bash_Ubuntu-20.04 {0}
+        shell: wsl-bash_Ubuntu-22.04 {0}
         run: |
           rm -f ./tarantool.pid ./tarantool.log
           TNT_PID=$(tarantool ./test/suites/lib/tarantool_python_ci.lua > tarantool.log 2>&1 & echo $!)
@@ -172,7 +181,7 @@ jobs:
 
       - name: Stop test tarantool instance
         if: ${{ always() }}
-        shell: wsl-bash_Ubuntu-20.04 {0}
+        shell: wsl-bash_Ubuntu-22.04 {0}
         run: |
           cat tarantool.log || true
           kill $(cat tarantool.pid) || true
@@ -184,25 +193,25 @@ jobs:
       - run_tests_pip_package_linux
       - run_tests_pip_package_windows
 
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
 
     strategy:
       fail-fast: false
 
     steps:
       - name: Clone the connector repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Setup Python and basic packing tools
         uses: actions/setup-python@v4
         with:
-          python-version: '3.10'
+          python-version: '3.11'
 
       - name: Install tools for package publishing
         run: pip3 install twine
 
       - name: Download pip package artifacts
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4.1.8
         with:
           name: pip_dist
           path: pip_dist
@@ -222,7 +231,7 @@ jobs:
     if: (github.event_name == 'push') ||
       (github.event_name == 'pull_request' &&
         github.event.pull_request.head.repo.full_name != github.repository)
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
 
     container:
       image: ${{ matrix.target.os }}:${{ matrix.target.dist }}
@@ -246,7 +255,7 @@ jobs:
         run: dnf install -y git
 
       - name: Clone the connector repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         # Checkout all tags for correct version computation.
         with:
           fetch-depth: 0
@@ -271,7 +280,7 @@ jobs:
         run: make rpm-dist-check
 
       - name: Archive RPM artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4.4.0
         with:
           name: rpm_dist_${{ matrix.target.os }}_${{ matrix.target.dist }}
           path: rpm_dist
@@ -289,7 +298,7 @@ jobs:
     if: (github.event_name == 'push') ||
       (github.event_name == 'pull_request' &&
         github.event.pull_request.head.repo.full_name != github.repository)
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
 
     container:
       image: ${{ matrix.target.os }}:${{ matrix.target.dist }}
@@ -308,7 +317,7 @@ jobs:
 
     steps:
       - name: Clone the connector repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Setup Python and test running tools
         # cmake rocks fail to install as expected without findutils:
@@ -320,11 +329,11 @@ jobs:
 
       - name: Install tarantool
         run: |
-          curl -L https://tarantool.io/yeohchA/release/2/installer.sh | bash
+          curl -L https://tarantool.io/release/2/installer.sh | bash
           dnf install -y tarantool tarantool-devel
 
       - name: Download RPM artifacts
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4.1.8
         with:
           name: rpm_dist_${{ matrix.target.os }}_${{ matrix.target.dist }}
           path: rpm_dist
@@ -339,6 +348,7 @@ jobs:
         run: |
           curl -L https://tarantool.io/release/2/installer.sh | bash
           sudo dnf install -y tt
+          pip3 install cmake==3.15.3
           tt rocks install crud
 
       - name: Run tests
@@ -350,7 +360,7 @@ jobs:
     needs:
       - run_tests_rpm
 
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
 
     strategy:
       fail-fast: false
@@ -366,13 +376,13 @@ jobs:
 
     steps:
       - name: Clone the connector repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install tools for package publishing
         run: sudo apt install -y curl make
 
       - name: Download RPM artifacts
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4.1.8
         with:
           name: rpm_dist_${{ matrix.target.os }}_${{ matrix.target.dist }}
           path: rpm_dist
@@ -400,21 +410,23 @@ jobs:
     if: (github.event_name == 'push') ||
       (github.event_name == 'pull_request' &&
         github.event.pull_request.head.repo.full_name != github.repository)
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
 
     strategy:
       fail-fast: false
 
     steps:
       - name: Clone the connector repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         # Checkout all tags for correct version computation
         with:
           fetch-depth: 0
 
       - name: Install deb packing tools
         run: |
+          sudo apt update
           sudo apt install -y devscripts equivs
+          sudo apt install python3-setuptools python3-stdeb dh-python
 
       - name: Make changelog entry for non-release build
         if: startsWith(github.ref, 'refs/tags') != true
@@ -432,7 +444,7 @@ jobs:
         run: make deb-dist-check
 
       - name: Archive deb artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4.4.0
         with:
           name: deb_dist
           path: deb_dist
@@ -448,7 +460,7 @@ jobs:
     if: (github.event_name == 'push') ||
       (github.event_name == 'pull_request' &&
         github.event.pull_request.head.repo.full_name != github.repository)
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
 
     container:
       image: ${{ matrix.target.os }}:${{ matrix.target.dist }}
@@ -458,18 +470,20 @@ jobs:
 
       matrix:
         target:
+        - os: debian
+          dist: bullseye # 11
+        - os: debian
+          dist: bookworm # 12
         - os: ubuntu
           dist: focal # 20.04
         - os: ubuntu
           dist: jammy # 22.04
-        - os: debian
-          dist: buster # 10
-        - os: debian
-          dist: bullseye # 11
+        - os: ubuntu
+          dist: noble # 24.04
 
     steps:
       - name: Clone the connector repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Prepare apt
         run: apt update
@@ -483,13 +497,13 @@ jobs:
       - name: Install tarantool ${{ matrix.tarantool }}
         run: |
           apt install -y curl
-          curl -L https://tarantool.io/yeohchA/release/2/installer.sh | bash
+          curl -L https://tarantool.io/release/2/installer.sh | bash
           apt install -y tarantool tarantool-dev
         env:
           DEBIAN_FRONTEND: noninteractive
 
       - name: Download deb artifacts
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4.1.8
         with:
           name: deb_dist
           path: deb_dist
@@ -499,17 +513,48 @@ jobs:
         env:
           DEBIAN_FRONTEND: noninteractive
 
+      # Usage of venv is mandatory starting with Debian 12 and Ubuntu 24.04.
+      - name: Create venv
+        run: |
+          apt install -y python3-venv
+          python3 -m venv .venv
+
       - name: Install test requirements
         run: pip3 install -r requirements-test.txt
+        if: matrix.target.dist != 'bookworm' && matrix.target.dist != 'noble'
+
+      - name: Install test requirements
+        run: |
+          . .venv/bin/activate
+          pip3 install -r requirements-test.txt
+        if: matrix.target.dist == 'bookworm' || matrix.target.dist == 'noble'
 
       - name: Install the crud module for testing purposes
         run: |
           curl -L https://tarantool.io/release/2/installer.sh | bash
           apt install -y tt
           tt rocks install crud
+        if: matrix.target.dist != 'bookworm' && matrix.target.dist != 'noble'
+      
+      - name: Install the crud module for testing purposes
+        run: |
+          . .venv/bin/activate
+          curl -L https://tarantool.io/release/3/installer.sh | bash
+          apt install -y tt
+          tt rocks install crud
+        if: matrix.target.dist == 'bookworm' || matrix.target.dist == 'noble'
 
       - name: Run tests
         run: make test-pure-install
+        if: matrix.target.dist != 'bookworm' && matrix.target.dist != 'noble'
+
+      - name: Run tests
+        run: |
+          . .venv/bin/activate
+          export PYTHONPATH=$PYTHONPATH:/usr/lib/python3.11:/usr/lib/python3.12:/usr/bin:/usr/lib/python3/dist-packages
+          export PATH=$PATH:/usr/lib/python3/dist-packages
+          make test-pure-install
+        if: matrix.target.dist == 'bookworm' || matrix.target.dist == 'noble'
 
   publish_deb:
     if: startsWith(github.ref, 'refs/tags')
@@ -517,7 +562,7 @@ jobs:
     needs:
       - run_tests_deb
 
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
 
     strategy:
       fail-fast: false
@@ -528,20 +573,24 @@ jobs:
           dist: focal # 20.04
         - os: ubuntu
           dist: jammy # 22.04
+        - os: ubuntu
+          dist: noble # 24.04
         - os: debian
           dist: buster # 10
         - os: debian
           dist: bullseye # 11
+        - os: debian
+          dist: bookworm # 12
 
     steps:
       - name: Clone the connector repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install tools for package publishing
         run: sudo apt install -y curl make
 
       - name: Download deb artifacts
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4.1.8
         with:
           name: deb_dist
           path: deb_dist
diff --git a/.github/workflows/reusable_testing.yml b/.github/workflows/reusable_testing.yml
index 1e66af13..79f9f2a4 100644
--- a/.github/workflows/reusable_testing.yml
+++ b/.github/workflows/reusable_testing.yml
@@ -11,15 +11,15 @@ on:
 
 jobs:
   run_tests:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
     steps:
       - name: Clone the tarantool-python connector
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           repository: ${{ github.repository_owner }}/tarantool-python
 
       - name: Download the tarantool build artifact
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v4.1.8
         with:
           name: ${{ inputs.artifact_name }}
 
@@ -29,9 +29,9 @@ jobs:
         run: sudo dpkg -i tarantool*.deb
 
       - name: Setup python3 for tests
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v5
         with:
-          python-version: 3.7
+          python-version: '3.11'
 
       - name: Install connector requirements
         run: pip3 install -r requirements.txt
@@ -43,6 +43,7 @@ jobs:
         run: |
           curl -L https://tarantool.io/release/2/installer.sh | bash
           sudo apt install -y tt
+          pip3 install cmake==3.15.3
           tt rocks install crud
 
       - run: make test
diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index 6c18acd0..8f94a4e6 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -6,6 +6,10 @@ on:
   pull_request_target:
     types: [labeled]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 jobs:
   run_tests_ce_linux:
     # We want to run on external PRs, but not on our own internal
@@ -17,54 +21,88 @@ jobs:
       (github.event_name == 'pull_request' &&
         github.event.pull_request.head.repo.full_name != github.repository)
 
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
 
     strategy:
       fail-fast: false
       matrix:
         tarantool:
-          - '1.10'
-          - '2.8'
-          - '2.10'
+          - '2.11'
+          - '3.3'
+          - 'master'
         python:
-          - '3.6'
-          - '3.7'
-          - '3.8'
           - '3.9'
           - '3.10'
+          - '3.11'
         msgpack-deps:
           # latest msgpack will be installed as a part of requirements.txt
           - ''
 
         # Adding too many elements to three-dimentional matrix results in
-        # too many test cases. It causes GitHub webpages to fail with 
+        # too many test cases. It causes GitHub webpages to fail with
         # "This page is taking too long to load." error. Thus we use
         # pairwise testing.
         include:
-          - tarantool: '2.8'
-            python: '3.10'
-            msgpack-deps: 'msgpack-python==0.4.0'
-          - tarantool: '2.8'
-            python: '3.10'
+          - tarantool: '3.3'
+            python: '3.11'
             msgpack-deps: 'msgpack==0.5.0'
-          - tarantool: '2.8'
-            python: '3.10'
+          - tarantool: '3.3'
+            python: '3.11'
             msgpack-deps: 'msgpack==0.6.2'
-          - tarantool: '2.8'
-            python: '3.10'
+          - tarantool: '3.3'
+            python: '3.11'
             msgpack-deps: 'msgpack==1.0.4'
 
     steps:
       - name: Clone the connector
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
+
+      - name: Setup tt
+        run: |
+          curl -L https://tarantool.io/release/3/installer.sh | sudo bash
+          sudo apt install -y tt
+          tt version
+          tt init
+
+      # Installation of the specific CMake version is a hotfix for
+      # https://github.com/tarantool/checks/issues/64
+      - name: Install old CMake
+        run: pip3 install cmake==3.15.3
 
       - name: Install tarantool ${{ matrix.tarantool }}
-        uses: tarantool/setup-tarantool@v1
+        if: matrix.tarantool != 'master'
+        uses: tarantool/setup-tarantool@v3
         with:
           tarantool-version: ${{ matrix.tarantool }}
 
+      - name: Get Tarantool master latest commit
+        if: matrix.tarantool == 'master'
+        run: |
+          commit_hash=$(git ls-remote https://github.com/tarantool/tarantool.git --branch master | head -c 8)
+          echo "LATEST_COMMIT=${commit_hash}" >> $GITHUB_ENV
+        shell: bash
+
+      - name: Cache Tarantool master
+        if: matrix.tarantool == 'master'
+        id: cache-latest
+        uses: actions/cache@v3
+        with:
+          path: |
+            ${{ github.workspace }}/bin
+            ${{ github.workspace }}/include
+          key: cache-latest-${{ env.LATEST_COMMIT }}
+
+      - name: Setup Tarantool master
+        if: matrix.tarantool == 'master' && steps.cache-latest.outputs.cache-hit != 'true'
+        run: |
+          tt install tarantool master
+
+      - name: Add Tarantool master to PATH
+        if: matrix.tarantool == 'master'
+        run: echo "${GITHUB_WORKSPACE}/bin" >> $GITHUB_PATH
+
       - name: Setup Python for tests
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python }}
 
@@ -86,10 +124,7 @@ jobs:
         run: pip3 install -r requirements-test.txt
 
       - name: Install the crud module for testing purposes
-        run: |
-          curl -L https://tarantool.io/release/2/installer.sh | bash
-          sudo apt install -y tt
-          tt rocks install crud
+        run: tt rocks install crud
 
       - name: Run tests
         run: make test
@@ -107,34 +142,30 @@ jobs:
         github.event.pull_request.head.repo.full_name != github.repository &&
         github.event.label.name == 'full-ci')
 
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
 
     strategy:
       fail-fast: false
       matrix:
         tarantool:
-          - bundle: 'bundle-1.10.11-0-gf0b0e7ecf-r470'
-            path: ''
-          - bundle: 'bundle-2.8.3-21-g7d35cd2be-r470'
-            path: ''
-          - bundle: 'bundle-2.10.0-1-gfa775b383-r486-linux-x86_64'
-            path: ''
-          - bundle: 'sdk-gc64-2.11.0-entrypoint-113-g803baaffe-r529.linux.x86_64'
-            path: 'dev/linux/x86_64/master/'
-        python: ['3.6', '3.7', '3.8', '3.9', '3.10']
+          - bundle: 'sdk-gc64-2.11.0-0-r563.linux.x86_64'
+            path: 'release/linux/x86_64/2.11/'
+          - bundle: 'sdk-gc64-3.3.1-0-r55.linux.x86_64'
+            path: 'release/linux/x86_64/3.3/'
+        python: ['3.9', '3.11']
 
     steps:
       - name: Clone the connector
         # `ref` as merge request is needed for pull_request_target because this
         # target runs in the context of the base commit of the pull request.
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         if: github.event_name == 'pull_request_target'
         with:
           ref: refs/pull/${{ github.event.pull_request.number }}/merge
 
       - name: Clone the connector
         if: github.event_name != 'pull_request_target'
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Install Tarantool EE SDK
         run: |
@@ -144,7 +175,7 @@ jobs:
           rm -f ${ARCHIVE_NAME}
 
       - name: Setup Python for tests
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python }}
 
@@ -159,8 +190,9 @@ jobs:
         # See more here: https://github.com/tarantool/tt/issues/282
         run: |
           source tarantool-enterprise/env.sh
-          curl -L https://tarantool.io/release/2/installer.sh | bash
+          curl -L https://tarantool.io/release/3/installer.sh | bash
           sudo apt install -y tt
+          pip3 install cmake==3.15.3
           tt rocks install crud TARANTOOL_DIR=$PWD/tarantool-enterprise
 
       - name: Run tests
@@ -168,8 +200,8 @@ jobs:
           source tarantool-enterprise/env.sh
           make test
         env:
-          TEST_TNT_SSL: ${{ matrix.tarantool.bundle == 'bundle-2.10.0-1-gfa775b383-r486-linux-x86_64' ||
-                            matrix.tarantool.bundle == 'sdk-gc64-2.11.0-entrypoint-113-g803baaffe-r529.linux.x86_64'}}
+          TEST_TNT_SSL: ${{ matrix.tarantool.bundle == 'sdk-gc64-2.10.7-0-r563.linux.x86_64' ||
+                            matrix.tarantool.bundle == 'sdk-gc64-2.11.0-0-r563.linux.x86_64'}}
 
   run_tests_pip_branch_install_linux:
     # We want to run on external PRs, but not on our own internal
@@ -180,31 +212,28 @@ jobs:
     if: (github.event_name == 'push') ||
       (github.event_name == 'pull_request' &&
         github.event.pull_request.head.repo.full_name != github.repository)
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
 
     strategy:
       fail-fast: false
 
       matrix:
         tarantool:
-          - '2.10'
+          - '2.11'
+          - '3.3'
         python:
-          - '3.6'
-          - '3.7'
-          - '3.8'
-          - '3.9'
-          - '3.10'
+          - '3.11'
     steps:
       - name: Clone the connector repo
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Install tarantool ${{ matrix.tarantool }}
-        uses: tarantool/setup-tarantool@v1
+        uses: tarantool/setup-tarantool@v3
         with:
           tarantool-version: ${{ matrix.tarantool }}
 
       - name: Setup Python for tests
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python }}
 
@@ -212,15 +241,21 @@ jobs:
         run: python3 .github/scripts/remove_source_code.py
 
       - name: Install the package with pip
-        run: pip3 install git+$GITHUB_SERVER_URL/$GITHUB_REPOSITORY@$GITHUB_REF_NAME
+        run: pip3 install git+$GITHUB_SERVER_URL/$GITHUB_REPOSITORY@$GITHUB_REF
+
+      # Installation of the specific CMake version is a hotfix for
+      # https://github.com/tarantool/checks/issues/64
+      - name: Install old CMake
+        run: pip3 install cmake==3.15.3
 
       - name: Install test requirements
         run: pip3 install -r requirements-test.txt
 
       - name: Install the crud module for testing purposes
         run: |
-          curl -L https://tarantool.io/release/2/installer.sh | bash
+          curl -L https://tarantool.io/release/3/installer.sh | bash
           sudo apt install -y tt
+          pip3 install cmake==3.15.3
           tt rocks install crud
 
       - name: Run tests
@@ -243,19 +278,17 @@ jobs:
       matrix:
         # Use reduced test matrix cause Windows pipelines are long.
         tarantool:
-          - '1.10'
-          - '2.8'
-          - '2.10.0.g0a5ce0b9c-1'
+          # https://github.com/tarantool/tarantool-python/issues/331
+          - '2.11.0.g247a9a418-1'
         python:
-          - '3.6'
-          - '3.10'
+          - '3.11'
 
     steps:
       - name: Clone the connector
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Setup Python for tests
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python }}
 
@@ -266,26 +299,18 @@ jobs:
         run: pip3 install -r requirements-test.txt
 
       - name: Setup WSL for tarantool
-        uses: Vampire/setup-wsl@v1
+        uses: Vampire/setup-wsl@v2
         with:
-          distribution: Ubuntu-20.04
-
-      - name: Install tarantool ${{ matrix.tarantool }} for WSL (2.8 and older)
-        if: (matrix.tarantool == '1.10') || (matrix.tarantool == '2.8')
-        shell: wsl-bash_Ubuntu-20.04 {0}
-        run: |
-          curl -L https://tarantool.io/installer.sh | VER=${{ matrix.tarantool }} bash -s -- --type "release"
-          sudo apt install -y tarantool tarantool-dev
+          distribution: Ubuntu-22.04
 
       - name: Install tarantool ${{ matrix.tarantool }} for WSL (2.10 and newer)
-        if: (matrix.tarantool != '1.10') && (matrix.tarantool != '2.8')
-        shell: wsl-bash_Ubuntu-20.04 {0}
+        shell: wsl-bash_Ubuntu-22.04 {0}
         run: |
           curl -L https://tarantool.io/release/2/installer.sh | bash -s
           sudo apt install -y tarantool=${{ matrix.tarantool }} tarantool-dev=${{ matrix.tarantool }}
 
       - name: Setup test tarantool instance
-        shell: wsl-bash_Ubuntu-20.04 {0}
+        shell: wsl-bash_Ubuntu-22.04 {0}
         run: |
           rm -f ./tarantool.pid ./tarantool.log
           TNT_PID=$(tarantool ./test/suites/lib/tarantool_python_ci.lua > tarantool.log 2>&1 & echo $!)
@@ -300,7 +325,7 @@ jobs:
 
       - name: Stop test tarantool instance
         if: ${{ always() }}
-        shell: wsl-bash_Ubuntu-20.04 {0}
+        shell: wsl-bash_Ubuntu-22.04 {0}
         run: |
           cat tarantool.log || true
           kill $(cat tarantool.pid) || true
@@ -323,16 +348,16 @@ jobs:
       matrix:
         # Use reduced test matrix cause Windows pipelines are long.
         tarantool:
-          - '2.10.0.g0a5ce0b9c-1'
+          # https://github.com/tarantool/tarantool-python/issues/331
+          - '2.11.0.g247a9a418-1'
         python:
-          - '3.6'
-          - '3.10'
+          - '3.11'
     steps:
       - name: Clone the connector repo
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Setup Python for tests
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python }}
 
@@ -340,24 +365,24 @@ jobs:
         run: python3 .github/scripts/remove_source_code.py
 
       - name: Install the package with pip
-        run: pip3 install git+$env:GITHUB_SERVER_URL/$env:GITHUB_REPOSITORY@$env:GITHUB_REF_NAME
+        run: pip3 install git+$env:GITHUB_SERVER_URL/$env:GITHUB_REPOSITORY@$env:GITHUB_REF
 
       - name: Install test requirements
         run: pip3 install -r requirements-test.txt
 
       - name: Setup WSL for tarantool
-        uses: Vampire/setup-wsl@v1
+        uses: Vampire/setup-wsl@v2
         with:
-          distribution: Ubuntu-20.04
+          distribution: Ubuntu-22.04
 
       - name: Install tarantool ${{ matrix.tarantool }} for WSL
-        shell: wsl-bash_Ubuntu-20.04 {0}
+        shell: wsl-bash_Ubuntu-22.04 {0}
         run: |
           curl -L https://tarantool.io/release/2/installer.sh | bash -s
           sudo apt install -y tarantool=${{ matrix.tarantool }} tarantool-dev=${{ matrix.tarantool }}
 
       - name: Setup test tarantool instance
-        shell: wsl-bash_Ubuntu-20.04 {0}
+        shell: wsl-bash_Ubuntu-22.04 {0}
         run: |
           rm -f ./tarantool.pid ./tarantool.log
           TNT_PID=$(tarantool ./test/suites/lib/tarantool_python_ci.lua > tarantool.log 2>&1 & echo $!)
@@ -372,7 +397,7 @@ jobs:
 
       - name: Stop test tarantool instance
         if: ${{ always() }}
-        shell: wsl-bash_Ubuntu-20.04 {0}
+        shell: wsl-bash_Ubuntu-22.04 {0}
         run: |
           cat tarantool.log || true
           kill $(cat tarantool.pid) || true
diff --git a/.gitignore b/.gitignore
index 9d3a8412..53a8daa2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -53,3 +53,5 @@ test/data/*.key
 !test/data/localhost.enc.key
 test/data/*.pem
 test/data/*.srl
+
+.rocks
diff --git a/.pylintrc b/.pylintrc
new file mode 100644
index 00000000..385d67ad
--- /dev/null
+++ b/.pylintrc
@@ -0,0 +1,13 @@
+[BASIC]
+
+# Good variable names which should always be accepted, separated by a comma
+good-names=i,j,k,ex,Run,_,ok,t,tz
+
+[FORMAT]
+# Allow links in docstings, allow tables
+ignore-long-lines=^(?:\s*(# )?(?:\.\.\s.+?:)?\s*<?https?://\S+>?)|(\s\+.+\+)|(\s\|.+\|)$
+
+[MESSAGES CONTROL]
+# Ignore unknown options to support per-entity ignores for newest warnings/errors
+# which are not supported for older versions.
+disable=unknown-option-value
diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 9375a9f6..bc990993 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -13,3 +13,6 @@ python:
     - method: pip
       path: .
     - requirements: docs/requirements.txt
+
+sphinx:
+  configuration: docs/source/conf.py
diff --git a/AUTHORS b/AUTHORS
index f77bd18d..92787ea1 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -35,3 +35,4 @@ Sergey Bronnikov <sergeyb@tarantool.org>
 Yaroslav Lobankov <y.lobankov@tarantool.org>
 Georgy Moiseev <georgy.moiseev@tarantool.org>
 Oleg Jukovec <oleg.jukovec@tarantool.org>
+Ilya Grishnov <ilya.grishnov@tarantool.org>
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5fb88ae8..8edd47e7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,11 +6,77 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+### Changed
+- Drop Python 3.6 support (PR #327).
+
+## 1.2.0 - 2024-03-27
+
+### Added
+- The ability to connect to the Tarantool using an existing socket fd (#304).
+
+## 1.1.2 - 2023-09-20
+
+### Fixed
+- Exception rethrow in crud API (PR #310).
+- Work with timestamps larger than year 2038 for some platforms (like Windows) (PR #311).
+  It covers
+  - building new `tarantool.Datetime` objects from timestamp,
+  - parsing datetime objects received from Tarantool.
+
+## 1.1.1 - 2023-07-19
+
+### Changed
+- Validate `tarantool.Interval` limits with the same rules as in Tarantool (PR #302).
+
+### Fixed
+- `tarantool.Interval` arithmetic with weeks (PR #302).
+- `tarantool.Interval` weeks display in `str()` and `repr()` (PR #302).
+
+## 1.1.0 - 2023-06-30
+
 ### Added
+- Allow to require specific server protocol version and features (#267).
 
 ### Changed
+- Drop `msgpack-python` support. Use `msgpack` instead.
+
+### Fixed
+- Parsing of E-notation Tarantool decimals with positive exponent (PR #298).
+
+## 1.0.0 - 2023-04-17
+
+### Changed
+- **Breaking**: Allow only named `on_push` and `on_push_ctx` for `insert` and `replace`.
+- Migrate to built-in `Warning` instead of a custom one.
+- Migrate to built-in `RecursionError` instead of a custom one.
+- Collect full exception traceback.
+- Rework `tarantool.Datetime` implementation to use built-in
+  `datetime.datetime`. External changes are as follows. Some of them
+  are **breaking**.
+  - Package no longer depends on `pandas` (#290).
+  - `__repr__` has been changed.
+  - Input arguments are validated with `datetime.datetime` rules.
+  - Class is no longer expected to throw `pandas.Timestamp`
+    exceptions. `datetime.datetime` exceptions will
+    be thrown instead of them.
+  - Drop the support of `__eq__` operator for `pandas.Timestamp`.
+- **Breaking**: Remove `join` and `subscribe` connection methods.
+
+## 0.12.1 - 2023-02-28
+
+### Changed
+- Discovery iproto features only for Tarantools since version 2.10.0 (#283).
+
+### Fixed
+- Schema fetch for spaces with foreign keys (#282).
+
+## 0.12.0 - 2023-02-13
+
+### Added
+- Support `fetch_schema` parameter for a connection (#219).
 
 ### Fixed
+- Error code on socket error (#279).
 
 ## 0.11.0 - 2022-12-31
 
@@ -160,7 +226,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Support pandas way to build datetime from timestamp (PR #252).
 
   `timestamp_since_utc_epoch` is a parameter to set timestamp
-  convertion behavior for timezone-aware datetimes.
+  conversion behavior for timezone-aware datetimes.
 
   If ``False`` (default), behaves similar to Tarantool `datetime.new()`:
 
@@ -180,7 +246,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
   Thus, if ``False``, datetime is computed from timestamp
   since epoch and then timezone is applied without any
-  convertion. In that case, `dt.timestamp` won't be equal to
+  conversion. In that case, `dt.timestamp` won't be equal to
   initialization `timestamp` for all timezones with non-zero offset.
 
   If ``True``, behaves similar to `pandas.Timestamp`:
@@ -344,7 +410,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Various improvements and fixes in README (PR #210, PR #215).
 
 ### Fixed
-- json.dumps compatibility with Python 2 (PR #186). 
+- json.dumps compatibility with Python 2 (PR #186).
 - Unix socket support in mesh_connection (PR #189, #111).
 - Various fixes in tests (PR #189, #111, PR #195, #194).
 
diff --git a/Makefile b/Makefile
index 1ab6441b..d3919795 100644
--- a/Makefile
+++ b/Makefile
@@ -3,8 +3,17 @@ install:
 	pip3 install --editable .
 
 
+PYTHON_FILES=tarantool test setup.py docs/source/conf.py
+TEXT_FILES=README.rst CHANGELOG.md docs/source/*.rst
+.PHONY: lint
+lint:
+	python3 -m pylint --recursive=y $(PYTHON_FILES)
+	python3 -m flake8 $(PYTHON_FILES)
+	codespell $(PYTHON_FILES) $(TEXT_FILES)
+
+
 .PHONY: test
-test:
+test: lint
 	python3 setup.py test
 
 .PHONY: test-pure-install
diff --git a/README.rst b/README.rst
index 41aa6a62..7e95ec3a 100644
--- a/README.rst
+++ b/README.rst
@@ -86,7 +86,7 @@ You can also install the development version of the package using ``pip``.
 What is Tarantool?
 ------------------
 
-`Tarantool`_ is an in-memory computing platform originally designed by 
+`Tarantool`_ is an in-memory computing platform originally designed by
 `VK`_ and released under the terms of `BSD license`_.
 
 Features
diff --git a/debian/changelog b/debian/changelog
index 0c13aaea..07127a11 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,140 @@
+python3-tarantool (1.2.0-0) unstable; urgency=medium
+
+    ## Overview
+
+    This release introduces socket fd connect support.
+
+    ## Added
+
+    - The ability to connect to the Tarantool using an existing socket fd (#304).
+
+ -- Georgy Moiseev <georgy.moiseev@tarantool.org>  Wed, 27 Mar 2024 11:00:00 +0300
+
+python3-tarantool (1.1.2-0) unstable; urgency=medium
+
+    ## Overview
+
+    This release introduce several bugfixes and behavior improvements.
+
+    ## Fixed
+
+    - Exception rethrow in crud API (PR #310).
+    - Work with timestamps larger than year 2038 for some platforms (like Windows) (PR #311).
+      It covers
+      - building new `tarantool.Datetime` objects from timestamp,
+      - parsing datetime objects received from Tarantool.
+
+ -- Georgy Moiseev <georgy.moiseev@tarantool.org>  Wed, 20 Sep 2023 10:00:00 +0300
+
+python3-tarantool (1.1.1-0) unstable; urgency=medium
+
+    ## Overview
+
+    This release introduces various datetime interval fixes and quality of life
+    improvements.
+
+    ## Breaking changes
+    - Forbid to create datetime intervals out of Tarantool limits (PR #302).
+
+    ## Changed
+    - Validate `tarantool.Interval` limits with the same rules as in Tarantool (PR #302).
+
+    ## Fixed
+    - `tarantool.Interval` arithmetic with weeks (PR #302).
+    - `tarantool.Interval` weeks display in `str()` and `repr()` (PR #302).
+
+ -- Georgy Moiseev <georgy.moiseev@tarantool.org>  Wed, 19 Jul 2023 18:00:00 +0300
+
+python3-tarantool (1.1.0-0) unstable; urgency=medium
+
+    ## Overview
+
+    This release introduces API to request server protocol version and
+    feature, as well as introduce decimal bugfix.
+
+    ## Breaking changes
+
+    - Drop `msgpack-python` support. (Package not supported since 2019.)
+      Use `msgpack` instead.
+
+    ## Added
+    - Allow to require specific server protocol version and features (#267).
+
+    ## Fixed
+    - Parsing of E-notation Tarantool decimals with positive exponent (PR #298).
+
+ -- Georgy Moiseev <georgy.moiseev@tarantool.org>  Fri, 30 Jun 2023 10:00:00 +0300
+
+python3-tarantool (1.0.0-0) unstable; urgency=medium
+
+    ## Overview
+
+    This release introduces several minor behavior changes
+    to make API more consistent.
+
+    Starting from this release, connector no longer depends on `pandas`.
+
+    ## Breaking changes
+
+    - Allow only named `on_push` and `on_push_ctx` for `insert` and `replace`.
+    - `tarantool.Datetime` `__repr__` has been changed.
+    - `tarantool.Datetime` input arguments are validated with `datetime.datetime` rules.
+    - `tarantool.Datetime` is no longer expected to throw `pandas.Timestamp`
+      exceptions. `datetime.datetime` exceptions will be thrown instead of them.
+    - Drop the support of `__eq__` operator of `tarantool.Datetime` for `pandas.Timestamp`.
+    - Remove `join` and `subscribe` connection methods.
+
+    ## Changes
+
+    - Migrate to built-in `Warning` instead of a custom one.
+    - Migrate to built-in `RecursionError` instead of a custom one.
+    - Collect full exception traceback.
+    - Package no longer depends on `pandas` (#290).
+
+    ## Infrastructure
+
+    - Lint the code with `pylint`, `flake8` and `codespell`.
+
+ -- Georgy Moiseev <georgy.moiseev@tarantool.org>  Mon, 17 Apr 2023 13:00:00 +0300
+
+python3-tarantool (0.12.1-0) unstable; urgency=medium
+
+    ## Overview
+
+    This release introduces several bugfixes and behavior improvements.
+
+    ## Breaking changes
+
+    This release should not break any existing behavior.
+
+    ## Bugfixes
+    - Discovery iproto features only for Tarantools since version 2.10.0 (#283).
+    - Schema fetch for spaces with foreign keys (#282).
+
+ -- Georgy Moiseev <georgy.moiseev@tarantool.org>  Tue, 28 Feb 2023 10:20:48 +0300
+
+python3-tarantool (0.12.0-0) unstable; urgency=medium
+
+    ## Overview
+
+    This release introduces the support of `fetch_schema` connection
+    option to disable schema fetch and various fixes.
+
+    ## Breaking changes
+
+    This release should not break any existing behavior.
+
+    ## New features
+    - `fetch_schema` parameter for a connection (#219).
+
+    ## Bugfixes
+    - Error code on socket error (#279).
+
+    ## Thanks
+    We want to thank @bekhzod91 for a bugfix contribution.
+
+ -- Georgy Moiseev <georgy.moiseev@tarantool.org>  Mon, 13 Feb 2023 11:43:30 +0300
+
 python3-tarantool (0.11.0-0) unstable; urgency=medium
 
     ## Overview
@@ -18,7 +155,7 @@ python3-tarantool (0.11.0-0) unstable; urgency=medium
     - Support specifying authentication method with `auth_type`
       and Tarantool EE `pap-sha256` authentication method (#269).
 
- -- Georgy.moiseev <admin@tarantool.org>  Sat, 31 Dec 2022 02:09:03 +0300
+ -- Georgy Moiseev <georgy.moiseev@tarantool.org>  Sat, 31 Dec 2022 02:09:03 +0300
 
 python3-tarantool (0.10.0-0) unstable; urgency=medium
 
@@ -223,7 +360,7 @@ python3-tarantool (0.10.0-0) unstable; urgency=medium
     - Pack and publish pip, RPM and deb packages with GitHub Actions (#164, #198).
     - Publish on readthedocs with CI/CD (including PRs) (#67).
 
- -- Georgy.moiseev <georgy.moiseev@tarantool.org>  Wed, 09 Nov 2022 13:14:20 +0300
+ -- Georgy Moiseev <georgy.moiseev@tarantool.org>  Wed, 09 Nov 2022 13:14:20 +0300
 
 tarantool-python (0.9.0-0) unstable; urgency=medium
     ## Overview
@@ -252,7 +389,7 @@ tarantool-python (0.9.0-0) unstable; urgency=medium
         transport="ssl",
         ssl_ca_file=client_ca_file)
     ```
-    
+   
     If the server authenticates clients using certificates issued by
     given CA, you must provide private SSL key file with `ssl_key_file`
     parameter and SSL certificate file with `ssl_cert_file` parameter.
@@ -313,7 +450,7 @@ tarantool-python (0.9.0-0) unstable; urgency=medium
     ```
 
     See [Tarantool Enterprise Edition manual](https://www.tarantool.io/en/enterprise_doc/security/#enterprise-iproto-encryption)
-    for details. 
+    for details.
 
     ## Breaking changes
 
diff --git a/debian/control b/debian/control
index dc7869fc..a5cfe113 100644
--- a/debian/control
+++ b/debian/control
@@ -4,7 +4,7 @@ Section: python
 Priority: optional
 # See https://github.com/astraw/stdeb/issues/175 for dependencies
 Build-Depends: python3, python3-dev, python3-pip, python3-setuptools,
-  python3-distutils, python3-wheel, python3-stdeb, dh-python,
+  python3-wheel, python3-stdeb, dh-python,
   debhelper (>= 10)
 Standards-Version: 3.9.1
 Homepage: https://github.com/tarantool/tarantool-python
diff --git a/debian/rules b/debian/rules
index 658c3ceb..df1413c3 100755
--- a/debian/rules
+++ b/debian/rules
@@ -14,7 +14,11 @@ override_dh_auto_build:
 	python3 setup.py build --force
 
 override_dh_auto_install:
-	python3 setup.py install --force --root=debian/python3-tarantool --no-compile -O0 --install-layout=deb --prefix=/usr 
+	python3 setup.py install --force --root=debian/python3-tarantool --no-compile -O0 --install-layout=deb --prefix=/usr
 
 override_dh_python2:
 	dh_python2 --no-guessing-versions
+
+# Force `xz` compression for older system with dpkg version < 1.15.6
+override_dh_builddeb:
+	dh_builddeb -- -Zxz
diff --git a/docs/requirements.txt b/docs/requirements.txt
index 964c9f18..a5b9de39 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,3 +1,3 @@
 sphinx==5.2.1
 sphinx-paramlinks==0.5.4
-sphinx-favicon==0.2
+sphinx_favicon==1.0.1
diff --git a/docs/source/conf.py b/docs/source/conf.py
index 4738e61d..953c2034 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -1,15 +1,19 @@
-# Tarantool python client library documentation build configuration file, created by
-# sphinx-quickstart on Tue Nov 29 06:29:57 2011.
-#
-# This file is execfile()d with the current directory set to its containing dir.
-#
-# Note that not all possible configuration values are present in this
-# autogenerated file.
-#
-# All configuration values have a default; values that are commented out
-# serve to show the default.
-
-import sys, os
+"""
+Tarantool python client library documentation build configuration file, created by
+sphinx-quickstart on Tue Nov 29 06:29:57 2011.
+
+This file is execfile()d with the current directory set to its containing dir.
+
+Note that not all possible configuration values are present in this
+autogenerated file.
+
+All configuration values have a default; values that are commented out
+serve to show the default.
+"""
+# pylint: disable=invalid-name,redefined-builtin,duplicate-code
+# flake8: noqa: E265
+
+import tarantool
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
@@ -25,7 +29,7 @@
 # coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
 extensions = ['sphinx.ext.autodoc', 'sphinx.ext.intersphinx', 'sphinx.ext.todo',
               'sphinx.ext.coverage', 'sphinx.ext.ifconfig', 'sphinx_paramlinks',
-              'sphinx-favicon',]
+              'sphinx_favicon',]
 
 autodoc_default_options = {
     'members': True,
@@ -45,15 +49,13 @@
 master_doc = 'index'
 
 # General information about the project.
-project = u'Tarantool python client library'
-copyright = u'2011-2022, tarantool-python AUTHORS'
+project = 'Tarantool python client library'
+copyright = '2011-2022, tarantool-python AUTHORS'
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
 # built documents.
 
-import tarantool
-
 # The short X.Y version.
 version = tarantool.__version__
 # The full version, including alpha/beta/rc tags.
@@ -126,7 +128,7 @@
 # pixels large.
 #html_favicon = None
 
-# Set up favicons with sphinx-favicon. 
+# Set up favicons with sphinx_favicon.
 favicons = [
     {
         "rel": "icon",
@@ -279,8 +281,8 @@
 # Grouping the document tree into LaTeX files. List of tuples
 # (source start file, target name, title, author, documentclass [howto/manual]).
 latex_documents = [
-  ('index', 'Tarantoolpythonclientlibrary.tex', u'Tarantool python client library Documentation',
-   u'tarantool-python AUTHORS', 'manual'),
+  ('index', 'Tarantoolpythonclientlibrary.tex', 'Tarantool python client library Documentation',
+   'tarantool-python AUTHORS', 'manual'),
 ]
 
 # The name of an image file (relative to this directory) to place at the top of
@@ -309,8 +311,8 @@
 # One entry per manual page. List of tuples
 # (source start file, name, description, authors, manual section).
 man_pages = [
-    ('index', 'tarantoolpythonclientlibrary', u'Tarantool python client library Documentation',
-     [u'tarantool-python AUTHORS'], 1)
+    ('index', 'tarantoolpythonclientlibrary', 'Tarantool python client library Documentation',
+     ['tarantool-python AUTHORS'], 1)
 ]
 
 # If true, show URL addresses after external links.
@@ -323,8 +325,8 @@
 # (source start file, target name, title, author,
 #  dir menu entry, description, category)
 texinfo_documents = [
-  ('index', 'Tarantoolpythonclientlibrary', u'Tarantool python client library Documentation',
-   u'tarantool-python AUTHORS', 'Tarantoolpythonclientlibrary', 'One line description of project.',
+  ('index', 'Tarantoolpythonclientlibrary', 'Tarantool python client library Documentation',
+   'tarantool-python AUTHORS', 'Tarantoolpythonclientlibrary', 'One line description of project.',
    'Miscellaneous'),
 ]
 
@@ -342,7 +344,6 @@
 intersphinx_mapping = {
     'python': ('http://docs.python.org/', None),
     'msgpack': ('https://msgpack-python.readthedocs.io/en/latest/', None),
-    'pandas': ('https://pandas.pydata.org/docs/', None),
     'pytz': ('https://pytz.sourceforge.net/', None),
 }
 
diff --git a/docs/source/index.rst b/docs/source/index.rst
index b2d31cd7..60a264fe 100644
--- a/docs/source/index.rst
+++ b/docs/source/index.rst
@@ -5,7 +5,7 @@ Python client library for Tarantool
 
 :Version: |version|
 
-`Tarantool`_ is an in-memory computing platform originally designed by 
+`Tarantool`_ is an in-memory computing platform originally designed by
 `VK`_ and released under the terms of `BSD license`_.
 
 Install Tarantool Python connector with ``pip`` (`PyPI`_ page):
@@ -78,7 +78,7 @@ API Reference
 
 .. Indices and tables
 .. ==================
-.. 
+..
 .. * :ref:`genindex`
 .. * :ref:`modindex`
 .. * :ref:`search`
diff --git a/docs/source/quick-start.rst b/docs/source/quick-start.rst
index 27633012..20dec4db 100644
--- a/docs/source/quick-start.rst
+++ b/docs/source/quick-start.rst
@@ -56,7 +56,7 @@ Throws an error if there is already a tuple with the same primary key.
     ...     conn.insert('demo', ('BBBB', 'Bravo'))
     ... except Exception as exc:
     ...     print(exc)
-    ... 
+    ...
     (3, 'Duplicate key exists in unique index "pk" in space "demo" with old tuple - ["BBBB", "Bravo"] and new tuple - ["BBBB", "Bravo"]')
 
 Replace
@@ -125,7 +125,7 @@ Creating a space instance
 An instance of :class:`~tarantool.space.Space` is a named object to access
 the key space.
 
-Create a ``demo`` object that will be used to access the space 
+Create a ``demo`` object that will be used to access the space
 with id ``'demo'``:
 
 .. code-block:: python
@@ -205,26 +205,26 @@ read-write and read-only pool instances:
 Receiving out-of-band messages
 ----------------------------------
 
-Receiving out-of-band messages from a server that uses box.session.push 
-call is supported for methods: :meth:`~tarantool.Connection.call`, 
-:meth:`~tarantool.Connection.eval`, :meth:`~tarantool.Connection.select`, 
-:meth:`~tarantool.Connection.insert`, :meth:`~tarantool.Connection.replace`, 
-:meth:`~tarantool.Connection.update`, :meth:`~tarantool.Connection.upsert`, 
+Receiving out-of-band messages from a server that uses box.session.push
+call is supported for methods: :meth:`~tarantool.Connection.call`,
+:meth:`~tarantool.Connection.eval`, :meth:`~tarantool.Connection.select`,
+:meth:`~tarantool.Connection.insert`, :meth:`~tarantool.Connection.replace`,
+:meth:`~tarantool.Connection.update`, :meth:`~tarantool.Connection.upsert`,
 :meth:`~tarantool.Connection.delete`.
 
-To work with out-of-band messages, 2 optional arguments are used in 
+To work with out-of-band messages, 2 optional arguments are used in
 the methods listed above:
 
  * `on_push` - callback, launched with the received data for each out-of-band message. Two arguments for this callback are expected:
-   
+  
     * the first is the received from an out-of-band message data.
 
     * the second is `on_push_ctx`, variable for working with callback context (for example, recording the result or pass data to callback).
  * `on_push_ctx` - result of the `on_push` work can be written to this variable, or through this variable you can pass data to `on_push` callback.
 
-Below is an example of the proposed API with method :meth:`~tarantool.Connection.call` 
-and :meth:`~tarantool.Connection.insert`. In the described example, before the end 
-of the :meth:`~tarantool.Connection.call` and :meth:`~tarantool.Connection.insert`, 
+Below is an example of the proposed API with method :meth:`~tarantool.Connection.call`
+and :meth:`~tarantool.Connection.insert`. In the described example, before the end
+of the :meth:`~tarantool.Connection.call` and :meth:`~tarantool.Connection.insert`,
 out-of-band messages are processed via specified callback.
 
 In the example below, two shells are used, in the first we will configure the server:
@@ -249,7 +249,7 @@ In the example below, two shells are used, in the first we will configure the se
         return x
     end
 
-In the second shell, we will execute a :meth:`~tarantool.Connection.call` 
+In the second shell, we will execute a :meth:`~tarantool.Connection.call`
 with receiving out-of-band messages from the server:
 
 .. code-block:: python
@@ -266,11 +266,11 @@ with receiving out-of-band messages from the server:
     conn = tarantool.Connection(port=3301)
     res = conn.call(
         'server_function',
-        on_push=callback, 
+        on_push=callback,
         on_push_ctx=callback_res
     )
 
-    # receiving out-of-band messages, 
+    # receiving out-of-band messages,
     # the conn.call is not finished yet.
 
     >>> run callback with data:  [[1, 0]]
@@ -285,7 +285,7 @@ with receiving out-of-band messages from the server:
     print(callback_res)
     >>> [[[1, 1]], [[2, 1]], [[3, 1]]]
 
-Let's go back to the first shell with the server and 
+Let's go back to the first shell with the server and
 create a space and a trigger for it:
 
 .. code-block:: lua
@@ -315,7 +315,7 @@ create a space and a trigger for it:
         on_replace_callback
     )
 
-Now, in the second shell, we will execute an :meth:`~tarantool.ConnectionPool.insert` 
+Now, in the second shell, we will execute an :meth:`~tarantool.ConnectionPool.insert`
 with out-of-band message processing:
 
 .. code-block:: python
@@ -333,7 +333,7 @@ with out-of-band message processing:
         on_push_ctx=callback_res,
     )
 
-    # receiving out-of-band messages, 
+    # receiving out-of-band messages,
     # the conn_pool.insert is not finished yet.
 
     >>> run callback with data:  [[100, 0]]
@@ -352,26 +352,26 @@ with out-of-band message processing:
 Interaction with the crud module
 ----------------------------------
 
-Through the :class:`~tarantool.Connection` object, you can access 
+Through the :class:`~tarantool.Connection` object, you can access
 `crud module <https://github.com/tarantool/crud>`_ methods:
 
 .. code-block:: python
 
     >>> import tarantool
     >>> from tarantool.error import CrudModuleError, CrudModuleManyError, DatabaseError
-    >>> conn = tarantool.Connection(host='localhost',port=3301)
+    >>> conn = tarantool.Connection(host='localhost',port=3301,fetch_schema=False)
 
     >>> conn.crud_
-    conn.crud_count(                conn.crud_insert(               conn.crud_insert_object_many(   
-    conn.crud_min(                  conn.crud_replace_object(       conn.crud_stats(                
-    conn.crud_unflatten_rows(       conn.crud_upsert_many(          conn.crud_delete(               
-    conn.crud_insert_many(          conn.crud_len(                  conn.crud_replace(              
-    conn.crud_replace_object_many(  conn.crud_storage_info(         conn.crud_update(               
-    conn.crud_upsert_object(        conn.crud_get(                  conn.crud_insert_object(        
-    conn.crud_max(                  conn.crud_replace_many(         conn.crud_select(               
+    conn.crud_count(                conn.crud_insert(               conn.crud_insert_object_many(  
+    conn.crud_min(                  conn.crud_replace_object(       conn.crud_stats(               
+    conn.crud_unflatten_rows(       conn.crud_upsert_many(          conn.crud_delete(              
+    conn.crud_insert_many(          conn.crud_len(                  conn.crud_replace(             
+    conn.crud_replace_object_many(  conn.crud_storage_info(         conn.crud_update(              
+    conn.crud_upsert_object(        conn.crud_get(                  conn.crud_insert_object(       
+    conn.crud_max(                  conn.crud_replace_many(         conn.crud_select(              
     conn.crud_truncate(             conn.crud_upsert(               conn.crud_upsert_object_many(
 
-As an example, consider :meth:`~tarantool.Connection.crud_insert` and :meth:`~tarantool.Connection.crud_insert_object_many`. 
+As an example, consider :meth:`~tarantool.Connection.crud_insert` and :meth:`~tarantool.Connection.crud_insert_object_many`.
 It is recommended to enclose calls in the try-except construction as follows:
 
 .. code-block:: python
@@ -392,13 +392,13 @@ It is recommended to enclose calls in the try-except construction as follows:
     ...     res = conn.crud_insert('tester', (3500,300,'Rob'))
     ... except CrudModuleError as e:
     ...     exc_crud = e
-    ... 
+    ...
     >>> exc_crud
     CrudModuleError(0, 'Failed to insert: Duplicate key exists in unique index "primary_index" in space "tester" with old tuple - [3500, 300, "Rob"] and new tuple - [3500, 300, "Rob"]')
     >>> exc_crud.extra_info_error
     <tarantool.crud.CrudError object at 0x10a276950>
     >>> exc_crud.extra_info_error.
-    exc_crud.extra_info_error.class_name  exc_crud.extra_info_error.err         exc_crud.extra_info_error.file        exc_crud.extra_info_error.line        exc_crud.extra_info_error.str       
+    exc_crud.extra_info_error.class_name  exc_crud.extra_info_error.err         exc_crud.extra_info_error.file        exc_crud.extra_info_error.line        exc_crud.extra_info_error.str      
     >>> exc_crud.extra_info_error.class_name
     'InsertError'
     >>> exc_crud.extra_info_error.str
@@ -409,7 +409,7 @@ It is recommended to enclose calls in the try-except construction as follows:
     ...     res = conn.crud_insert_object_many('tester', ({'id':3,'bucket_id':100,'name':'Ann'}, {'id':4,'bucket_id':100,'name':'Sam'}), {'timeout':100, 'rollback_on_error':False})
     ... except CrudModuleManyError as e:
     ...     exc_crud = e
-    ... 
+    ...
     >>> exc_crud
     CrudModuleManyError(0, 'Got multiple errors, see errors_list')
     >>> exc_crud.success_list # some of the rows were inserted.
@@ -422,7 +422,7 @@ It is recommended to enclose calls in the try-except construction as follows:
     'CallError: Failed for 037adb3a-b9e3-4f78-a6d1-9f0cdb6cbefc: Function returned an error: Duplicate key exists in unique index "primary_index" in space "tester" with old tuple - [3500, 300, "Rob"] and new tuple - [3500, 100, "Mike"]'
     >>> exc_crud.errors_list[1].str
     'InsertManyError: Failed to flatten object: FlattenError: Object is specified in bad format: FlattenError: Unknown field "second_name" is specified'
-    
+   
     # If there are no problems with any rows, the entire response will be contained in the res variable.
     >>> res = conn.crud_insert_object_many('tester', ({'id':3,'bucket_id':100,'name':'Ann'}, {'id':4,'bucket_id':100,'name':'Sam'}), {'timeout':100, 'rollback_on_error':False})
     >>> res.rows
@@ -436,7 +436,7 @@ If module crud not found on the router or user has not sufficient grants:
     ...     res = conn.crud_insert('tester', (22221,300,'Rob'))
     ... except DatabaseError as e:
     ...     exc_db = e
-    ... 
+    ...
     >>> exc_db
     DatabaseError(33, "Procedure 'crud.insert' is not defined. Ensure that you're calling crud.router and user has sufficient grants")
     >>> exc_db.extra_info
diff --git a/requirements-test.txt b/requirements-test.txt
index ae4091d2..0f2ad987 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -1,3 +1,11 @@
 git+https://github.com/baztian/dbapi-compliance.git@ea7cb1b4#egg=dbapi-compliance
-pyyaml==6.0
+pyyaml >= 6.0.2
 importlib-metadata >= 1.0 ; python_version < '3.8'
+pylint == 3.3.0 ; python_version >= '3.9'
+pylint == 3.2.7 ; python_version == '3.8'
+pylint == 2.17.7 ; python_version == '3.7'
+flake8 == 6.1.0 ; python_version >= '3.8'
+flake8 == 5.0.4 ; python_version < '3.8'
+codespell == 2.3.0 ; python_version >= '3.8'
+codespell == 2.2.5 ; python_version < '3.8'
+setuptools >= 75.3.2
diff --git a/requirements.txt b/requirements.txt
index aa4406ce..afcf7b25 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,2 @@
 msgpack
-pandas
 pytz
-dataclasses; python_version <= '3.6'
diff --git a/rpm/SPECS/python-tarantool.spec b/rpm/SPECS/python-tarantool.spec
index b1dae43d..b1e5727e 100644
--- a/rpm/SPECS/python-tarantool.spec
+++ b/rpm/SPECS/python-tarantool.spec
@@ -29,7 +29,6 @@ Python client library for Tarantool.}
 %package -n python3-%{srcname}
 
 Requires:       python3-msgpack
-Requires:       python3-pandas
 Requires:       python3-pytz
 
 Summary:        %{summary}
diff --git a/setup.py b/setup.py
index 1c565e79..3fa65c9c 100755
--- a/setup.py
+++ b/setup.py
@@ -1,37 +1,46 @@
 #!/usr/bin/env python
+"""
+Package setup commands.
+"""
+# pylint: disable=bad-option-value,too-many-ancestors
 
 import codecs
 import os
-import re
 
-try:
-    from setuptools import setup, find_packages
-    from setuptools.command.build_py import build_py
-except ImportError:
-    from distutils.core import setup, find_packages
-    from distutils.command.build_py import build_py
+from setuptools import find_packages, setup
+from setuptools.command.build_py import build_py
 
 # Extra commands for documentation management
 cmdclass = {}
 command_options = {}
 
-# Build the package
-# python setup.py build_py
-# builds the package with generating correspondent VERSION file
+
 class BuildPyCommand(build_py):
+    """
+    Build the package
+    python setup.py build_py
+    builds the package with generating correspondent VERSION file
+    """
+
     def run(self):
+        """
+        Run the command.
+        """
+
         # Import here to allow to run commands
         # like `python setup.py test` without setuptools_scm.
+        # pylint: disable=import-outside-toplevel,import-error
         from setuptools_scm import get_version
         version = get_version()
 
         package_dir = self.get_package_dir('tarantool')
         version_file = os.path.join(package_dir, 'version.py')
-        with open(version_file, 'w') as file:
+        with open(version_file, 'w', encoding='utf-8') as file:
             file.write(f"__version__ = '{version}'")
 
         return super().run()
 
+
 cmdclass["build_py"] = BuildPyCommand
 
 # Build Sphinx documentation (html)
@@ -47,33 +56,34 @@ def run(self):
 # Test runner
 # python setup.py test
 try:
-    from test.setup_command import test
-    cmdclass["test"] = test
+    from test.setup_command import Test
+    cmdclass["test"] = Test
 except ImportError:
     pass
 
 
 def read(*parts):
+    """
+    Read the file.
+    """
+
     filename = os.path.join(os.path.dirname(__file__), *parts)
-    with codecs.open(filename, encoding='utf-8') as fp:
-        return fp.read()
+    with codecs.open(filename, encoding='utf-8') as file:
+        return file.read()
+
+
+def get_dependencies(filename):
+    """
+    Get package dependencies from the `requirements.txt`.
+    """
 
-def get_dependencies(file):
     root = os.path.dirname(os.path.realpath(__file__))
-    requirements = os.path.join(root, file)
-    result = []
+    requirements = os.path.join(root, filename)
     if os.path.isfile(requirements):
-        with open(requirements) as f:
-            return f.read().splitlines()
-    raise RuntimeError("Unable to get dependencies from file " + file)
-
-def find_version(*file_paths):
-    version_file = read(*file_paths)
-    version_match = re.search(r"""^__version__\s*=\s*(['"])(.+)\1""",
-                              version_file, re.M)
-    if version_match:
-        return version_match.group(2)
-    raise RuntimeError("Unable to find version string.")
+        with open(requirements, encoding='utf-8') as file:
+            return file.read().splitlines()
+    raise RuntimeError("Unable to get dependencies from file " + filename)
+
 
 packages = [item for item in find_packages('.') if item.startswith('tarantool')]
 
@@ -102,7 +112,7 @@ def find_version(*file_paths):
     command_options=command_options,
     install_requires=get_dependencies('requirements.txt'),
     setup_requires=[
-        'setuptools_scm==6.4.2',
+        'setuptools_scm==7.1.0',
     ],
-    python_requires='>=3.6',
+    python_requires='>=3.7',
 )
diff --git a/tarantool/__init__.py b/tarantool/__init__.py
index 915961fd..97a1e860 100644
--- a/tarantool/__init__.py
+++ b/tarantool/__init__.py
@@ -1,6 +1,7 @@
-# pylint: disable=C0301,W0105,W0401,W0614
-
-import sys
+"""
+This package provides API for interaction with a Tarantool server.
+"""
+# pylint: disable=too-many-arguments,too-many-positional-arguments
 
 from tarantool.connection import Connection
 from tarantool.mesh_connection import MeshConnection
@@ -50,7 +51,7 @@
     __version__ = '0.0.0-dev'
 
 
-def connect(host="localhost", port=33013, user=None, password=None,
+def connect(host="localhost", port=33013, socket_fd=None, user=None, password=None,
             encoding=ENCODING_DEFAULT, transport=DEFAULT_TRANSPORT,
             ssl_key_file=DEFAULT_SSL_KEY_FILE,
             ssl_cert_file=DEFAULT_SSL_CERT_FILE,
@@ -63,6 +64,8 @@ def connect(host="localhost", port=33013, user=None, password=None,
 
     :param port: Refer to :paramref:`~tarantool.Connection.params.port`.
 
+    :param socket_fd: Refer to :paramref:`~tarantool.Connection.params.socket_fd`.
+
     :param user: Refer to :paramref:`~tarantool.Connection.params.user`.
 
     :param password: Refer to
@@ -92,6 +95,7 @@ def connect(host="localhost", port=33013, user=None, password=None,
     """
 
     return Connection(host, port,
+                      socket_fd=socket_fd,
                       user=user,
                       password=password,
                       socket_timeout=SOCKET_TIMEOUT,
@@ -141,4 +145,4 @@ def connectmesh(addrs=({'host': 'localhost', 'port': 3301},), user=None,
 __all__ = ['connect', 'Connection', 'connectmesh', 'MeshConnection', 'Schema',
            'Error', 'DatabaseError', 'NetworkError', 'NetworkWarning',
            'SchemaError', 'dbapi', 'Datetime', 'Interval', 'IntervalAdjust',
-           'ConnectionPool', 'Mode', 'BoxError',]
+           'ConnectionPool', 'Mode', 'BoxError']
diff --git a/tarantool/connection.py b/tarantool/connection.py
index 7fd43b9e..682b0700 100644
--- a/tarantool/connection.py
+++ b/tarantool/connection.py
@@ -1,43 +1,43 @@
-# pylint: disable=C0301,W0105,W0401,W0614
 """
 This module provides API for interaction with a Tarantool server.
 """
+# pylint: disable=too-many-lines,duplicate-code
 
 import os
+import select
 import time
 import errno
+from enum import Enum
 import socket
 try:
     import ssl
-    is_ssl_supported = True
+    IS_SSL_SUPPORTED = True
 except ImportError:
-    is_ssl_supported = False
+    IS_SSL_SUPPORTED = False
 import sys
 import abc
 
 import ctypes
 import ctypes.util
 from ctypes import c_ssize_t
+from typing import Optional, Union
+from copy import copy
 
 import msgpack
 
 from tarantool.response import (
     unpacker_factory as default_unpacker_factory,
-    Response,
 )
 from tarantool.request import (
     packer_factory as default_packer_factory,
     Request,
-    # RequestOK,
     RequestCall,
     RequestDelete,
     RequestEval,
     RequestInsert,
-    RequestJoin,
     RequestReplace,
     RequestPing,
     RequestSelect,
-    RequestSubscribe,
     RequestUpdate,
     RequestUpsert,
     RequestAuthenticate,
@@ -52,14 +52,15 @@
     RECONNECT_DELAY,
     DEFAULT_TRANSPORT,
     SSL_TRANSPORT,
+    DEFAULT_HOST,
+    DEFAULT_PORT,
+    DEFAULT_SOCKET_FD,
     DEFAULT_SSL_KEY_FILE,
     DEFAULT_SSL_CERT_FILE,
     DEFAULT_SSL_CA_FILE,
     DEFAULT_SSL_CIPHERS,
     DEFAULT_SSL_PASSWORD,
     DEFAULT_SSL_PASSWORD_FILE,
-    REQUEST_TYPE_OK,
-    REQUEST_TYPE_ERROR,
     IPROTO_GREETING_SIZE,
     ITERATOR_EQ,
     ITERATOR_ALL,
@@ -69,7 +70,9 @@
     IPROTO_FEATURE_TRANSACTIONS,
     IPROTO_FEATURE_ERROR_EXTENSION,
     IPROTO_FEATURE_WATCHERS,
-    IPROTO_AUTH_TYPE,
+    IPROTO_FEATURE_PAGINATION,
+    IPROTO_FEATURE_SPACE_AND_INDEX_NAMES,
+    IPROTO_FEATURE_WATCH_ONCE,
     IPROTO_CHUNK,
     AUTH_TYPE_CHAP_SHA1,
     AUTH_TYPE_PAP_SHA256,
@@ -93,7 +96,6 @@
     CrudModuleError,
     CrudModuleManyError,
     SchemaReloadException,
-    Warning,
     warn
 )
 from tarantool.schema import Schema
@@ -108,7 +110,10 @@
     CrudError,
     call_crud,
 )
-from typing import Union
+
+WWSAEWOULDBLOCK = 10035
+ER_UNKNOWN_REQUEST_TYPE = 48
+
 
 # Based on https://realpython.com/python-interface/
 class ConnectionInterface(metaclass=abc.ABCMeta):
@@ -120,36 +125,37 @@ class ConnectionInterface(metaclass=abc.ABCMeta):
     Lua code on server, make simple data manipulations and execute SQL
     queries.
     """
+    # pylint: disable=too-many-public-methods
 
     @classmethod
     def __subclasshook__(cls, subclass):
-        return (hasattr(subclass, 'close') and
-                callable(subclass.close) and
-                hasattr(subclass, 'is_closed') and
-                callable(subclass.is_closed) and
-                hasattr(subclass, 'connect') and
-                callable(subclass.connect) and
-                hasattr(subclass, 'call') and
-                callable(subclass.call) and
-                hasattr(subclass, 'eval') and
-                callable(subclass.eval) and
-                hasattr(subclass, 'replace') and
-                callable(subclass.replace) and
-                hasattr(subclass, 'insert') and
-                callable(subclass.insert) and
-                hasattr(subclass, 'delete') and
-                callable(subclass.delete) and
-                hasattr(subclass, 'upsert') and
-                callable(subclass.upsert) and
-                hasattr(subclass, 'update') and
-                callable(subclass.update) and
-                hasattr(subclass, 'ping') and
-                callable(subclass.ping) and
-                hasattr(subclass, 'select') and
-                callable(subclass.select) and
-                hasattr(subclass, 'execute') and
-                callable(subclass.execute) or
-                NotImplemented)
+        return (hasattr(subclass, 'close')
+                and callable(subclass.close)
+                and hasattr(subclass, 'is_closed')
+                and callable(subclass.is_closed)
+                and hasattr(subclass, 'connect')
+                and callable(subclass.connect)
+                and hasattr(subclass, 'call')
+                and callable(subclass.call)
+                and hasattr(subclass, 'eval')
+                and callable(subclass.eval)
+                and hasattr(subclass, 'replace')
+                and callable(subclass.replace)
+                and hasattr(subclass, 'insert')
+                and callable(subclass.insert)
+                and hasattr(subclass, 'delete')
+                and callable(subclass.delete)
+                and hasattr(subclass, 'upsert')
+                and callable(subclass.upsert)
+                and hasattr(subclass, 'update')
+                and callable(subclass.update)
+                and hasattr(subclass, 'ping')
+                and callable(subclass.ping)
+                and hasattr(subclass, 'select')
+                and callable(subclass.select)
+                and hasattr(subclass, 'execute')
+                and callable(subclass.execute)
+                or NotImplemented)
 
     @abc.abstractmethod
     def close(self):
@@ -193,7 +199,7 @@ def eval(self, expr, *args, on_push=None, on_push_ctx=None):
         raise NotImplementedError
 
     @abc.abstractmethod
-    def replace(self, space_name, values, on_push=None, on_push_ctx=None):
+    def replace(self, space_name, values, *, on_push=None, on_push_ctx=None):
         """
         Reference implementation: :meth:`~tarantool.Connection.replace`.
         """
@@ -201,7 +207,7 @@ def replace(self, space_name, values, on_push=None, on_push_ctx=None):
         raise NotImplementedError
 
     @abc.abstractmethod
-    def insert(self, space_name, values, on_push=None, on_push_ctx=None):
+    def insert(self, space_name, values, *, on_push=None, on_push_ctx=None):
         """
         Reference implementation: :meth:`~tarantool.Connection.insert`.
         """
@@ -213,15 +219,17 @@ def delete(self, space_name, key, *, index=None, on_push=None, on_push_ctx=None)
         """
         Reference implementation: :meth:`~tarantool.Connection.delete`.
         """
+        # pylint: disable=too-many-arguments
 
         raise NotImplementedError
 
     @abc.abstractmethod
-    def upsert(self, space_name, tuple_value, op_list, *, index=None, 
+    def upsert(self, space_name, tuple_value, op_list, *, index=None,
                on_push=None, on_push_ctx=None):
         """
         Reference implementation: :meth:`~tarantool.Connection.upsert`.
         """
+        # pylint: disable=too-many-arguments
 
         raise NotImplementedError
 
@@ -230,6 +238,7 @@ def update(self, space_name, key, op_list, *, index=None, on_push=None, on_push_
         """
         Reference implementation: :meth:`~tarantool.Connection.update`.
         """
+        # pylint: disable=too-many-arguments
 
         raise NotImplementedError
 
@@ -247,6 +256,7 @@ def select(self, space_name, key, *, offset=None, limit=None,
         """
         Reference implementation: :meth:`~tarantool.Connection.select`.
         """
+        # pylint: disable=too-many-arguments
 
         raise NotImplementedError
 
@@ -259,7 +269,7 @@ def execute(self, query, params):
         raise NotImplementedError
 
     @abc.abstractmethod
-    def crud_insert(self, space_name, values, opts={}):
+    def crud_insert(self, space_name, values, opts=None):
         """
         Reference implementation: :meth:`~tarantool.Connection.crud_insert`.
         """
@@ -267,7 +277,7 @@ def crud_insert(self, space_name, values, opts={}):
         raise NotImplementedError
 
     @abc.abstractmethod
-    def crud_insert_object(self, space_name, values, opts={}):
+    def crud_insert_object(self, space_name, values, opts=None):
         """
         Reference implementation: :meth:`~tarantool.Connection.crud_insert_object`.
         """
@@ -275,7 +285,7 @@ def crud_insert_object(self, space_name, values, opts={}):
         raise NotImplementedError
 
     @abc.abstractmethod
-    def crud_insert_many(self, space_name, values, opts={}):
+    def crud_insert_many(self, space_name, values, opts=None):
         """
         Reference implementation: :meth:`~tarantool.Connection.crud_insert_many`.
         """
@@ -283,7 +293,7 @@ def crud_insert_many(self, space_name, values, opts={}):
         raise NotImplementedError
 
     @abc.abstractmethod
-    def crud_insert_object_many(self, space_name, values, opts={}):
+    def crud_insert_object_many(self, space_name, values, opts=None):
         """
         Reference implementation: :meth:`~tarantool.Connection.crud_insert_object_many`.
         """
@@ -291,7 +301,7 @@ def crud_insert_object_many(self, space_name, values, opts={}):
         raise NotImplementedError
 
     @abc.abstractmethod
-    def crud_get(self, space_name, key, opts={}):
+    def crud_get(self, space_name, key, opts=None):
         """
         Reference implementation: :meth:`~tarantool.Connection.crud_get`.
         """
@@ -299,7 +309,7 @@ def crud_get(self, space_name, key, opts={}):
         raise NotImplementedError
 
     @abc.abstractmethod
-    def crud_update(self, space_name, key, operations=[], opts={}):
+    def crud_update(self, space_name, key, operations=None, opts=None):
         """
         Reference implementation: :meth:`~tarantool.Connection.crud_update`.
         """
@@ -307,7 +317,7 @@ def crud_update(self, space_name, key, operations=[], opts={}):
         raise NotImplementedError
 
     @abc.abstractmethod
-    def crud_delete(self, space_name, key, opts={}):
+    def crud_delete(self, space_name, key, opts=None):
         """
         Reference implementation: :meth:`~tarantool.Connection.crud_delete`.
         """
@@ -315,7 +325,7 @@ def crud_delete(self, space_name, key, opts={}):
         raise NotImplementedError
 
     @abc.abstractmethod
-    def crud_replace(self, space_name, values, opts={}):
+    def crud_replace(self, space_name, values, opts=None):
         """
         Reference implementation: :meth:`~tarantool.Connection.crud_replace`.
         """
@@ -323,7 +333,7 @@ def crud_replace(self, space_name, values, opts={}):
         raise NotImplementedError
 
     @abc.abstractmethod
-    def crud_replace_object(self, space_name, values, opts={}):
+    def crud_replace_object(self, space_name, values, opts=None):
         """
         Reference implementation: :meth:`~tarantool.Connection.crud_replace_object`.
         """
@@ -331,7 +341,7 @@ def crud_replace_object(self, space_name, values, opts={}):
         raise NotImplementedError
 
     @abc.abstractmethod
-    def crud_replace_many(self, space_name, values, opts={}):
+    def crud_replace_many(self, space_name, values, opts=None):
         """
         Reference implementation: :meth:`~tarantool.Connection.crud_replace_many`.
         """
@@ -339,7 +349,7 @@ def crud_replace_many(self, space_name, values, opts={}):
         raise NotImplementedError
 
     @abc.abstractmethod
-    def crud_replace_object_many(self, space_name, values, opts={}):
+    def crud_replace_object_many(self, space_name, values, opts=None):
         """
         Reference implementation: :meth:`~tarantool.Connection.crud_replace_object_many`.
         """
@@ -347,7 +357,7 @@ def crud_replace_object_many(self, space_name, values, opts={}):
         raise NotImplementedError
 
     @abc.abstractmethod
-    def crud_upsert(self, space_name, values, operations=[], opts={}):
+    def crud_upsert(self, space_name, values, operations=None, opts=None):
         """
         Reference implementation: :meth:`~tarantool.Connection.crud_upsert`.
         """
@@ -355,7 +365,7 @@ def crud_upsert(self, space_name, values, operations=[], opts={}):
         raise NotImplementedError
 
     @abc.abstractmethod
-    def crud_upsert_object(self, space_name, values, operations=[], opts={}):
+    def crud_upsert_object(self, space_name, values, operations=None, opts=None):
         """
         Reference implementation: :meth:`~tarantool.Connection.crud_upsert_object`.
         """
@@ -363,7 +373,7 @@ def crud_upsert_object(self, space_name, values, operations=[], opts={}):
         raise NotImplementedError
 
     @abc.abstractmethod
-    def crud_upsert_many(self, space_name, values_operation, opts={}):
+    def crud_upsert_many(self, space_name, values_operation, opts=None):
         """
         Reference implementation: :meth:`~tarantool.Connection.crud_upsert_many`.
         """
@@ -371,7 +381,7 @@ def crud_upsert_many(self, space_name, values_operation, opts={}):
         raise NotImplementedError
 
     @abc.abstractmethod
-    def crud_upsert_object_many(self, space_name, values_operation, opts={}):
+    def crud_upsert_object_many(self, space_name, values_operation, opts=None):
         """
         Reference implementation: :meth:`~tarantool.Connection.crud_upsert_object_many`.
         """
@@ -379,7 +389,7 @@ def crud_upsert_object_many(self, space_name, values_operation, opts={}):
         raise NotImplementedError
 
     @abc.abstractmethod
-    def crud_select(self, space_name: str, conditions=[], opts={}):
+    def crud_select(self, space_name: str, conditions=None, opts=None):
         """
         Reference implementation: :meth:`~tarantool.Connection.crud_select`.
         """
@@ -387,7 +397,7 @@ def crud_select(self, space_name: str, conditions=[], opts={}):
         raise NotImplementedError
 
     @abc.abstractmethod
-    def crud_min(self, space_name, index_name, opts={}):
+    def crud_min(self, space_name, index_name, opts=None):
         """
         Reference implementation: :meth:`~tarantool.Connection.crud_min`.
         """
@@ -395,7 +405,7 @@ def crud_min(self, space_name, index_name, opts={}):
         raise NotImplementedError
 
     @abc.abstractmethod
-    def crud_max(self, space_name, index_name, opts={}):
+    def crud_max(self, space_name, index_name, opts=None):
         """
         Reference implementation: :meth:`~tarantool.Connection.crud_max`.
         """
@@ -403,7 +413,7 @@ def crud_max(self, space_name, index_name, opts={}):
         raise NotImplementedError
 
     @abc.abstractmethod
-    def crud_truncate(self, space_name, opts={}):
+    def crud_truncate(self, space_name, opts=None):
         """
         Reference implementation: :meth:`~tarantool.Connection.crud_truncate`.
         """
@@ -411,7 +421,7 @@ def crud_truncate(self, space_name, opts={}):
         raise NotImplementedError
 
     @abc.abstractmethod
-    def crud_len(self, space_name, opts={}):
+    def crud_len(self, space_name, opts=None):
         """
         Reference implementation: :meth:`~tarantool.Connection.crud_len`.
         """
@@ -419,7 +429,7 @@ def crud_len(self, space_name, opts={}):
         raise NotImplementedError
 
     @abc.abstractmethod
-    def crud_storage_info(self, opts={}):
+    def crud_storage_info(self, opts=None):
         """
         Reference implementation: :meth:`~tarantool.Connection.crud_storage_info`.
         """
@@ -427,7 +437,7 @@ def crud_storage_info(self, opts={}):
         raise NotImplementedError
 
     @abc.abstractmethod
-    def crud_count(self, space_name, conditions=[], opts={}):
+    def crud_count(self, space_name, conditions=None, opts=None):
         """
         Reference implementation: :meth:`~tarantool.Connection.crud_count`.
         """
@@ -451,6 +461,34 @@ def crud_unflatten_rows(self, rows, metadata):
         raise NotImplementedError
 
 
+class JoinState(Enum):
+    """
+    Current replication join state. See `join protocol`_ for more info.
+
+    .. _join protocol: https://www.tarantool.io/en/doc/latest/dev_guide/internals/iproto/replication/#box-protocol-join
+    """
+
+    HANDSHAKE = 1
+    """
+    Sent the join request.
+    """
+
+    INITIAL = 2
+    """
+    Received initial vclock.
+    """
+
+    FINAL = 3
+    """
+    Received current vclock.
+    """
+
+    DONE = 4
+    """
+    No more messages expected.
+    """
+
+
 class Connection(ConnectionInterface):
     """
     Represents a connection to the Tarantool server.
@@ -459,6 +497,7 @@ class Connection(ConnectionInterface):
     check its status, call procedures and evaluate Lua code on server,
     make simple data manipulations and execute SQL queries.
     """
+    # pylint: disable=too-many-instance-attributes,too-many-public-methods,bad-option-value,no-self-use
 
     # DBAPI Extension: supply exceptions as attributes on the connection
     Error = Error
@@ -559,7 +598,10 @@ class Connection(ConnectionInterface):
     :value: :exc:`~tarantool.error.CrudModuleError`
     """
 
-    def __init__(self, host, port,
+    def __init__(self,
+                 host=DEFAULT_HOST,
+                 port=DEFAULT_PORT,
+                 socket_fd=DEFAULT_SOCKET_FD,
                  user=None,
                  password=None,
                  socket_timeout=SOCKET_TIMEOUT,
@@ -579,14 +621,20 @@ def __init__(self, host, port,
                  ssl_password_file=DEFAULT_SSL_PASSWORD_FILE,
                  packer_factory=default_packer_factory,
                  unpacker_factory=default_unpacker_factory,
-                 auth_type=None):
+                 auth_type=None,
+                 fetch_schema=True,
+                 required_protocol_version=None,
+                 required_features=None):
         """
         :param host: Server hostname or IP address. Use ``None`` for
             Unix sockets.
         :type host: :obj:`str` or :obj:`None`
 
-        :param port: Server port or Unix socket path.
-        :type port: :obj:`int` or :obj:`str`
+        :param port: Server port, or Unix socket path.
+        :type port: :obj:`int` or :obj:`str` or :obj:`None`
+
+        :param socket_fd: socket fd number.
+        :type socket_fd: :obj:`int` or :obj:`None`
 
         :param user: User name for authentication on the Tarantool
             server.
@@ -736,6 +784,26 @@ def __init__(self, host, port,
             ``"chap-sha1"``.
         :type auth_type: :obj:`None` or :obj:`str`, optional
 
+        :param bool fetch_schema: If ``False``, schema is not loaded on connect
+            and schema updates are not automatically loaded.
+            As a result, these methods become unavailable:
+            :meth:`~tarantool.Connection.replace`,
+            :meth:`~tarantool.Connection.insert`,
+            :meth:`~tarantool.Connection.delete`,
+            :meth:`~tarantool.Connection.upsert`,
+            :meth:`~tarantool.Connection.update`,
+            :meth:`~tarantool.Connection.select`,
+            :meth:`~tarantool.Connection.space`.
+        :type fetch_schema: :obj:`bool`, optional
+
+        :param required_protocol_version: Minimal protocol version that
+            should be supported by Tarantool server.
+        :type required_protocol_version: :obj:`int` or :obj:`None`, optional
+
+        :param required_features: List of protocol features that
+            should be supported by Tarantool server.
+        :type required_features: :obj:`list` or :obj:`None`, optional
+
         :raise: :exc:`~tarantool.error.ConfigurationError`,
             :meth:`~tarantool.Connection.connect` exceptions
 
@@ -744,10 +812,23 @@ def __init__(self, host, port,
         .. _mp_bin: https://github.com/msgpack/msgpack/blob/master/spec.md#bin-format-family
         .. _mp_array: https://github.com/msgpack/msgpack/blob/master/spec.md#array-format-family
         """
+        # pylint: disable=too-many-arguments,too-many-locals,too-many-statements,too-many-positional-arguments
+
+        if host is None and port is None and socket_fd is None:
+            raise ConfigurationError("need to specify host/port, "
+                                     "port (in case of Unix sockets) "
+                                     "or socket_fd")
+
+        if socket_fd is not None and (host is not None or port is not None):
+            raise ConfigurationError("specifying both socket_fd and host/port is not allowed")
+
+        if host is not None and port is None:
+            raise ConfigurationError("when specifying host, "
+                                     "it is also necessary to specify port")
 
         if msgpack.version >= (1, 0, 0) and encoding not in (None, 'utf-8'):
-            raise ConfigurationError("msgpack>=1.0.0 only supports None and " +
-                                     "'utf-8' encoding option values")
+            raise ConfigurationError("msgpack>=1.0.0 only supports None and "
+                                     + "'utf-8' encoding option values")
 
         if os.name == 'nt':
             libc = ctypes.WinDLL(
@@ -761,13 +842,15 @@ def __init__(self, host, port,
         recv.restype = ctypes.c_int
         self.host = host
         self.port = port
+        self.socket_fd = socket_fd
         self.user = user
         self.password = password
         self.socket_timeout = socket_timeout
         self.reconnect_delay = reconnect_delay
         self.reconnect_max_attempts = reconnect_max_attempts
-        self.schema = Schema(self)
-        self.schema_version = 1
+        self.fetch_schema = fetch_schema
+        self.schema = None
+        self.schema_version = 0
         self._socket = None
         self.connected = False
         self.error = True
@@ -788,11 +871,23 @@ def __init__(self, host, port,
             IPROTO_FEATURE_TRANSACTIONS: False,
             IPROTO_FEATURE_ERROR_EXTENSION: False,
             IPROTO_FEATURE_WATCHERS: False,
+            IPROTO_FEATURE_PAGINATION: False,
+            IPROTO_FEATURE_SPACE_AND_INDEX_NAMES: False,
+            IPROTO_FEATURE_WATCH_ONCE: False,
         }
         self._packer_factory_impl = packer_factory
         self._unpacker_factory_impl = unpacker_factory
         self._client_auth_type = auth_type
         self._server_auth_type = None
+        self.version_id = None
+        self.uuid = None
+        self._salt = None
+        self._client_protocol_version = CONNECTOR_IPROTO_VERSION
+        self._client_features = copy(CONNECTOR_FEATURES)
+        self._server_protocol_version = None
+        self._server_features = None
+        self.required_protocol_version = required_protocol_version
+        self.required_features = copy(required_features)
 
         if connect_now:
             self.connect()
@@ -825,10 +920,37 @@ def connect_basic(self):
         :meta private:
         """
 
-        if self.host is None:
-            self.connect_unix()
-        else:
+        if self.socket_fd is not None:
+            self.connect_socket_fd()
+        elif self.host is not None:
             self.connect_tcp()
+        else:
+            self.connect_unix()
+
+    def connect_socket_fd(self):
+        """
+        Establish a connection using an existing socket fd.
+
+            +---------------------+--------------------------+-------------------------+
+            | socket_fd / timeout |         >= 0             |         `None`          |
+            +=====================+==========================+=========================+
+            |      blocking       | Set non-blocking socket  | Don't change, `select`  |
+            |                     | lib call `select`        | isn't needed            |
+            +---------------------+--------------------------+-------------------------+
+            |     non-blocking    | Don't change, socket lib | Don't change, call      |
+            |                     | call `select`            | `select` ourselves      |
+            +---------------------+--------------------------+-------------------------+
+
+        :meta private:
+        """
+
+        self.connected = True
+        if self._socket:
+            self._socket.close()
+
+        self._socket = socket.socket(fileno=self.socket_fd)
+        if self.socket_timeout is not None:
+            self._socket.settimeout(self.socket_timeout)
 
     def connect_tcp(self):
         """
@@ -849,9 +971,9 @@ def connect_tcp(self):
                 (self.host, self.port), timeout=self.connection_timeout)
             self._socket.settimeout(self.socket_timeout)
             self._socket.setsockopt(socket.SOL_TCP, socket.TCP_NODELAY, 1)
-        except socket.error as e:
+        except socket.error as exc:
             self.connected = False
-            raise NetworkError(e)
+            raise NetworkError(exc) from exc
 
     def connect_unix(self):
         """
@@ -862,6 +984,7 @@ def connect_unix(self):
 
         :meta private:
         """
+        # pylint: disable=no-member
 
         try:
             # If old socket already exists - close it and re-create
@@ -872,9 +995,9 @@ def connect_unix(self):
             self._socket.settimeout(self.connection_timeout)
             self._socket.connect(self.port)
             self._socket.settimeout(self.socket_timeout)
-        except socket.error as e:
+        except socket.error as exc:
             self.connected = False
-            raise NetworkError(e)
+            raise NetworkError(exc) from exc
 
     def wrap_socket_ssl(self):
         """
@@ -885,17 +1008,17 @@ def wrap_socket_ssl(self):
         :meta private:
         """
 
-        if not is_ssl_supported:
+        if not IS_SSL_SUPPORTED:
             raise SslError("Your version of Python doesn't support SSL")
 
         ver = sys.version_info
         if ver[0] < 3 or (ver[0] == 3 and ver[1] < 5):
-            raise SslError("SSL transport is supported only since " +
+            raise SslError("SSL transport is supported only since "
                            "python 3.5")
 
         if ((self.ssl_cert_file is None and self.ssl_key_file is not None)
            or (self.ssl_cert_file is not None and self.ssl_key_file is None)):
-            raise SslError("Both ssl_cert_file and ssl_key_file should be " +
+            raise SslError("Both ssl_cert_file and ssl_key_file should be "
                            "configured or unconfigured")
 
         try:
@@ -926,10 +1049,10 @@ def wrap_socket_ssl(self):
                 context.set_ciphers(self.ssl_ciphers)
 
             self._socket = context.wrap_socket(self._socket)
-        except SslError as e:
-            raise e
-        except Exception as e:
-            raise SslError(e)
+        except SslError as exc:
+            raise exc
+        except Exception as exc:
+            raise SslError(exc) from exc
 
     def _ssl_load_cert_chain(self, context):
         """
@@ -954,34 +1077,32 @@ def _ssl_load_cert_chain(self, context):
                                         keyfile=self.ssl_key_file,
                                         password=self.ssl_password)
                 return
-            except Exception as e:
-                exc_list.append(e)
-
+            except Exception as exc:  # pylint: disable=bad-option-value,broad-exception-caught,broad-except
+                exc_list.append(exc)
 
         if self.ssl_password_file is not None:
-            with open(self.ssl_password_file) as file:
+            with open(self.ssl_password_file, encoding=self.encoding) as file:
                 for line in file:
                     try:
                         context.load_cert_chain(certfile=self.ssl_cert_file,
                                                 keyfile=self.ssl_key_file,
                                                 password=line.rstrip())
                         return
-                    except Exception as e:
-                        exc_list.append(e)
-
+                    except Exception as exc:  # pylint: disable=bad-option-value,broad-exception-caught,broad-except
+                        exc_list.append(exc)
 
         try:
             def password_raise_error():
-                raise SslError("Password prompt for decrypting the private " +
-                               "key is unsupported, use ssl_password or " +
+                raise SslError("Password prompt for decrypting the private "
+                               "key is unsupported, use ssl_password or "
                                "ssl_password_file")
             context.load_cert_chain(certfile=self.ssl_cert_file,
                                     keyfile=self.ssl_key_file,
                                     password=password_raise_error)
 
             return
-        except Exception as e:
-            exc_list.append(e)
+        except Exception as exc:  # pylint: disable=bad-option-value,broad-exception-caught,broad-except
+            exc_list.append(exc)
 
         raise SslError(exc_list)
 
@@ -1000,9 +1121,11 @@ def handshake(self):
         if greeting.protocol != "Binary":
             raise NetworkError("Unsupported protocol: " + greeting.protocol)
         self.version_id = greeting.version_id
-        self._check_features()
         self.uuid = greeting.uuid
         self._salt = greeting.salt
+
+        self._check_features()
+
         if self.user:
             self.authenticate(self.user, self.password)
 
@@ -1023,12 +1146,16 @@ def connect(self):
             if self.transport == SSL_TRANSPORT:
                 self.wrap_socket_ssl()
             self.handshake()
-            self.load_schema()
-        except SslError as e:
-            raise e
-        except Exception as e:
+            if self.fetch_schema:
+                self.schema = Schema(self)
+                self.load_schema()
+            else:
+                self.schema = None
+        except SslError as exc:
+            raise exc
+        except Exception as exc:
             self.connected = False
-            raise NetworkError(e)
+            raise NetworkError(exc) from exc
 
     def _recv(self, to_read):
         """
@@ -1047,28 +1174,33 @@ def _recv(self, to_read):
         while to_read > 0:
             try:
                 tmp = self._socket.recv(to_read)
-            except OverflowError:
+            except BlockingIOError:
+                ready, _, _ = select.select([self._socket.fileno()], [], [], self.socket_timeout)
+                if not ready:
+                    raise NetworkError(TimeoutError())  # pylint: disable=raise-missing-from
+                continue
+            except OverflowError as exc:
                 self._socket.close()
                 err = socket.error(
                     errno.ECONNRESET,
                     "Packet too large. Closing connection to server"
                 )
-                raise NetworkError(err)
-            except socket.error:
+                raise NetworkError(err) from exc
+            except socket.error as exc:
+                err = socket.error(
+                    errno.ECONNRESET,
+                    "Lost connection to server during query"
+                )
+                raise NetworkError(err) from exc
+
+            if len(tmp) == 0:
                 err = socket.error(
                     errno.ECONNRESET,
                     "Lost connection to server during query"
                 )
                 raise NetworkError(err)
-            else:
-                if len(tmp) == 0:
-                    err = socket.error(
-                        errno.ECONNRESET,
-                        "Lost connection to server during query"
-                    )
-                    raise NetworkError(err)
-                to_read -= len(tmp)
-                buf += tmp
+            to_read -= len(tmp)
+            buf += tmp
         return buf
 
     def _read_response(self):
@@ -1086,6 +1218,41 @@ def _read_response(self):
         # Read the packet
         return self._recv(length)
 
+    def _sendall(self, bytes_to_send):
+        """
+        Sends bytes to the transport (socket).
+
+        :param bytes_to_send: Message to send.
+        :type bytes_to_send: :obj:`bytes`
+
+        :raise: :exc:`~tarantool.error.NetworkError`
+
+        :meta private:
+        """
+
+        total_sent = 0
+        while total_sent < len(bytes_to_send):
+            try:
+                sent = self._socket.send(bytes_to_send[total_sent:])
+                if sent == 0:
+                    err = socket.error(
+                        errno.ECONNRESET,
+                        "Lost connection to server during query"
+                    )
+                    raise NetworkError(err)
+                total_sent += sent
+            except BlockingIOError as exc:
+                total_sent += exc.characters_written
+                _, ready, _ = select.select([], [self._socket.fileno()], [], self.socket_timeout)
+                if not ready:
+                    raise NetworkError(TimeoutError())  # pylint: disable=raise-missing-from
+            except socket.error as exc:
+                err = socket.error(
+                    errno.ECONNRESET,
+                    "Lost connection to server during query"
+                )
+                raise NetworkError(err) from exc
+
     def _send_request_wo_reconnect(self, request, on_push=None, on_push_ctx=None):
         """
         Send request without trying to reconnect.
@@ -1114,16 +1281,17 @@ def _send_request_wo_reconnect(self, request, on_push=None, on_push_ctx=None):
         response = None
         while True:
             try:
-                self._socket.sendall(bytes(request))
+                self._sendall(bytes(request))
                 response = request.response_class(self, self._read_response())
                 break
-            except SchemaReloadException as e:
-                self.update_schema(e.schema_version)
+            except SchemaReloadException as exc:
+                if self.schema is not None:
+                    self.update_schema(exc.schema_version)
                 continue
 
-        while response._code == IPROTO_CHUNK:
-            if on_push is not None: 
-                on_push(response._data, on_push_ctx)
+        while response.code == IPROTO_CHUNK:
+            if on_push is not None:
+                on_push(response.data, on_push_ctx)
             response = request.response_class(self, self._read_response())
 
         return response
@@ -1138,42 +1306,41 @@ def _opt_reconnect(self):
 
         :meta private:
         """
+        # pylint: disable=no-member
 
         # **Bug in Python: timeout is an internal Python construction (???).
         if not self._socket:
-            return self.connect()
+            self.connect()
+            return
 
         def check():  # Check that connection is alive
             buf = ctypes.create_string_buffer(2)
             try:
                 sock_fd = self._socket.fileno()
-            except socket.error as e:
-                if e.errno == errno.EBADF:
-                    return errno.ECONNRESETtuple_value
-            else:
-                if os.name == 'nt':
-                    flag = socket.MSG_PEEK
-                    self._socket.setblocking(False)
-                else:
-                    flag = socket.MSG_DONTWAIT | socket.MSG_PEEK
-                retbytes = self._sys_recv(sock_fd, buf, 1, flag)
-
-                err = 0
-                if os.name!= 'nt':
-                    err = ctypes.get_errno()
-                else:
-                    err = ctypes.get_last_error()
-                    self._socket.setblocking(True)
-
-
-                WWSAEWOULDBLOCK = 10035
-                if (retbytes < 0) and (err == errno.EAGAIN or
-                                       err == errno.EWOULDBLOCK or
-                                       err == WWSAEWOULDBLOCK):
-                    ctypes.set_errno(0)
-                    return errno.EAGAIN
-                else:
+            except socket.error as exc:
+                if exc.errno == errno.EBADF:
                     return errno.ECONNRESET
+                return exc.errno
+
+            if os.name == 'nt':
+                flag = socket.MSG_PEEK
+                self._socket.setblocking(False)
+            else:
+                flag = socket.MSG_DONTWAIT | socket.MSG_PEEK
+            retbytes = self._sys_recv(sock_fd, buf, 1, flag)
+
+            err = 0
+            if os.name != 'nt':
+                err = ctypes.get_errno()
+            else:
+                err = ctypes.get_last_error()
+                self._socket.setblocking(True)
+
+            if (retbytes < 0) and err in (errno.EAGAIN, errno.EWOULDBLOCK, WWSAEWOULDBLOCK):
+                ctypes.set_errno(0)
+                return errno.EAGAIN
+
+            return errno.ECONNRESET
 
         last_errno = check()
         if self.connected and last_errno == errno.EAGAIN:
@@ -1190,8 +1357,8 @@ def check():  # Check that connection is alive
             else:
                 if self.connected:
                     break
-            warn("Reconnecting, attempt %d of %d" %
-                 (attempt, self.reconnect_max_attempts), NetworkWarning)
+            warn(f"Reconnecting, attempt {attempt} of {self.reconnect_max_attempts}",
+                 NetworkWarning)
             if attempt == self.reconnect_max_attempts:
                 raise NetworkError(
                     socket.error(last_errno, errno.errorcode[last_errno]))
@@ -1255,6 +1422,9 @@ def update_schema(self, schema_version):
         :meta private:
         """
 
+        if self.schema is None:
+            self.schema = Schema(self)
+
         self.schema_version = schema_version
         self.flush_schema()
 
@@ -1269,6 +1439,19 @@ def flush_schema(self):
         self.schema.flush()
         self.load_schema()
 
+    def _schemaful_connection_check(self):
+        """
+        Checks whether the connection is schemaful.
+        If the connection is schemaless, an exception will be thrown
+        about unsupporting the method in connection opened
+        with fetch_schema=False.
+
+        :raise: :exc:`~tarantool.error.NotSupportedError`
+        """
+        if self.schema is None:
+            raise NotSupportedError('This method is not available in '
+                                    'connection opened with fetch_schema=False')
+
     def call(self, func_name, *args, on_push=None, on_push_ctx=None):
         """
         Execute a CALL request: call a stored Lua function.
@@ -1342,7 +1525,7 @@ def eval(self, expr, *args, on_push=None, on_push_ctx=None):
         response = self._send_request(request, on_push, on_push_ctx)
         return response
 
-    def replace(self, space_name, values, on_push=None, on_push_ctx=None):
+    def replace(self, space_name, values, *, on_push=None, on_push_ctx=None):
         """
         Execute a REPLACE request: `replace`_ a tuple in the space.
         Doesn't throw an error if there is no tuple with the specified
@@ -1366,11 +1549,14 @@ def replace(self, space_name, values, on_push=None, on_push_ctx=None):
             :exc:`~tarantool.error.DatabaseError`,
             :exc:`~tarantool.error.SchemaError`,
             :exc:`~tarantool.error.NetworkError`,
-            :exc:`~tarantool.error.SslError`
+            :exc:`~tarantool.error.SslError`,
+            :exc:`~tarantool.error.NotSupportedError`
 
         .. _replace: https://www.tarantool.io/en/doc/latest/reference/reference_lua/box_space/replace/
         """
 
+        self._schemaful_connection_check()
+
         if isinstance(space_name, str):
             space_name = self.schema.get_space(space_name).sid
         if on_push is not None and not callable(on_push):
@@ -1405,13 +1591,14 @@ def authenticate(self, user, password):
         if not self._socket:
             return self._opt_reconnect()
 
-        request = RequestAuthenticate(self,
-                              salt=self._salt,
-                              user=self.user,
-                              password=self.password,
-                              auth_type=self._get_auth_type())
+        request = RequestAuthenticate(
+            self,
+            salt=self._salt,
+            user=self.user,
+            password=self.password,
+            auth_type=self._get_auth_type())
         auth_response = self._send_request_wo_reconnect(request)
-        if auth_response.return_code == 0:
+        if auth_response.return_code == 0 and self.schema is not None:
             self.flush_schema()
         return auth_response
 
@@ -1431,11 +1618,13 @@ def _get_auth_type(self):
                 auth_type = AUTH_TYPE_CHAP_SHA1
             else:
                 if self._server_auth_type not in AUTH_TYPES:
-                    raise ConfigurationError(f'Unknown server authentication type {self._server_auth_type}')
+                    raise ConfigurationError('Unknown server authentication type '
+                                             + str(self._server_auth_type))
                 auth_type = self._server_auth_type
         else:
             if self._client_auth_type not in AUTH_TYPES:
-                raise ConfigurationError(f'Unknown client authentication type {self._client_auth_type}')
+                raise ConfigurationError('Unknown client authentication type '
+                                         + str(self._client_auth_type))
             auth_type = self._client_auth_type
 
         if auth_type == AUTH_TYPE_PAP_SHA256 and self.transport != SSL_TRANSPORT:
@@ -1443,124 +1632,16 @@ def _get_auth_type(self):
 
         return auth_type
 
-    def _join_v16(self, server_uuid):
-        """
-        Execute a JOIN request for Tarantool 1.6 and older.
-
-        :param server_uuid: UUID of Tarantool server to join.
-        :type server_uuid: :obj:`str`
-
-        :raise: :exc:`~AssertionError`,
-            :exc:`~tarantool.error.DatabaseError`,
-            :exc:`~tarantool.error.SchemaError`,
-            :exc:`~tarantool.error.NetworkError`,
-            :exc:`~tarantool.error.SslError`
-        """
-
-        request = RequestJoin(self, server_uuid)
-        self._socket.sendall(bytes(request))
-
-        while True:
-            resp = Response(self, self._read_response())
-            yield resp
-            if resp.code == REQUEST_TYPE_OK or resp.code >= REQUEST_TYPE_ERROR:
-                return
-        self.close()  # close connection after JOIN
-
-    def _join_v17(self, server_uuid):
-        """
-        Execute a JOIN request for Tarantool 1.7 and newer.
-
-        :param server_uuid: UUID of Tarantool server to join.
-        :type server_uuid: :obj:`str`
-
-        :raise: :exc:`~AssertionError`,
-            :exc:`~tarantool.error.DatabaseError`,
-            :exc:`~tarantool.error.SchemaError`,
-            :exc:`~tarantool.error.NetworkError`,
-            :exc:`~tarantool.error.SslError`
-        """
-
-        class JoinState:
-            Handshake, Initial, Final, Done = range(4)
-
-        request = RequestJoin(self, server_uuid)
-        self._socket.sendall(bytes(request))
-        state = JoinState.Handshake
-        while True:
-            resp = Response(self, self._read_response())
-            yield resp
-            if resp.code >= REQUEST_TYPE_ERROR:
-                return
-            elif resp.code == REQUEST_TYPE_OK:
-                state = state + 1
-                if state == JoinState.Done:
-                    return
-
     def _ops_process(self, space, update_ops):
         new_ops = []
-        for op in update_ops:
-            if isinstance(op[1], str):
-                op = list(op)
-                op[1] = self.schema.get_field(space, op[1])['id']
-            new_ops.append(op)
+        for operation in update_ops:
+            if isinstance(operation[1], str):
+                operation = list(operation)
+                operation[1] = self.schema.get_field(space, operation[1])['id']
+            new_ops.append(operation)
         return new_ops
 
-    def join(self, server_uuid):
-        """
-        Execute a JOIN request: `join`_ a replicaset.
-
-        :param server_uuid: UUID of connector "server".
-        :type server_uuid: :obj:`str`
-
-        :raise: :exc:`~AssertionError`,
-            :exc:`~tarantool.error.DatabaseError`,
-            :exc:`~tarantool.error.SchemaError`,
-            :exc:`~tarantool.error.NetworkError`,
-            :exc:`~tarantool.error.SslError`
-
-        .. _join: https://www.tarantool.io/en/doc/latest/dev_guide/internals/box_protocol/#iproto-join-0x41
-        """
-
-        self._opt_reconnect()
-        if self.version_id < version_id(1, 7, 0):
-            return self._join_v16(server_uuid)
-        return self._join_v17(server_uuid)
-
-    def subscribe(self, cluster_uuid, server_uuid, vclock=None):
-        """
-        Execute a SUBSCRIBE request: `subscribe`_ to a replicaset
-        updates. Connection is closed after subscribing.
-
-        :param cluster_uuid: UUID of replicaset cluster.
-        :type cluster_uuid: :obj:`str`
-
-        :param server_uuid: UUID of connector "server".
-        :type server_uuid: :obj:`str`
-
-        :param vclock: Connector "server" vclock.
-        :type vclock: :obj:`dict` or :obj:`None`, optional
-
-        :raise: :exc:`~AssertionError`,
-            :exc:`~tarantool.error.DatabaseError`,
-            :exc:`~tarantool.error.SchemaError`,
-            :exc:`~tarantool.error.NetworkError`,
-            :exc:`~tarantool.error.SslError`
-
-        .. _subscribe: https://www.tarantool.io/en/doc/latest/dev_guide/internals/box_protocol/#iproto-subscribe-0x42
-        """
-
-        vclock = vclock or {}
-        request = RequestSubscribe(self, cluster_uuid, server_uuid, vclock)
-        self._socket.sendall(bytes(request))
-        while True:
-            resp = Response(self, self._read_response())
-            yield resp
-            if resp.code >= REQUEST_TYPE_ERROR:
-                return
-        self.close()  # close connection after SUBSCRIBE
-
-    def insert(self, space_name, values, on_push=None, on_push_ctx=None):
+    def insert(self, space_name, values, *, on_push=None, on_push_ctx=None):
         """
         Execute an INSERT request: `insert`_ a tuple to the space.
         Throws an error if there is already a tuple with the same
@@ -1584,11 +1665,14 @@ def insert(self, space_name, values, on_push=None, on_push_ctx=None):
             :exc:`~tarantool.error.DatabaseError`,
             :exc:`~tarantool.error.SchemaError`,
             :exc:`~tarantool.error.NetworkError`,
-            :exc:`~tarantool.error.SslError`
+            :exc:`~tarantool.error.SslError`,
+            :exc:`~tarantool.error.NotSupportedError`
 
         .. _insert: https://www.tarantool.io/en/doc/latest/reference/reference_lua/box_space/insert/
         """
 
+        self._schemaful_connection_check()
+
         if isinstance(space_name, str):
             space_name = self.schema.get_space(space_name).sid
         if on_push is not None and not callable(on_push):
@@ -1623,10 +1707,14 @@ def delete(self, space_name, key, *, index=0, on_push=None, on_push_ctx=None):
             :exc:`~tarantool.error.DatabaseError`,
             :exc:`~tarantool.error.SchemaError`,
             :exc:`~tarantool.error.NetworkError`,
-            :exc:`~tarantool.error.SslError`
+            :exc:`~tarantool.error.SslError`,
+            :exc:`~tarantool.error.NotSupportedError`
 
         .. _delete: https://www.tarantool.io/en/doc/latest/reference/reference_lua/box_space/delete/
         """
+        # pylint: disable=too-many-arguments
+
+        self._schemaful_connection_check()
 
         key = wrap_key(key)
         if isinstance(space_name, str):
@@ -1682,10 +1770,14 @@ def upsert(self, space_name, tuple_value, op_list, *, index=0, on_push=None, on_
             :exc:`~tarantool.error.DatabaseError`,
             :exc:`~tarantool.error.SchemaError`,
             :exc:`~tarantool.error.NetworkError`,
-            :exc:`~tarantool.error.SslError`
+            :exc:`~tarantool.error.SslError`,
+            :exc:`~tarantool.error.NotSupportedError`
 
         .. _upsert: https://www.tarantool.io/en/doc/latest/reference/reference_lua/box_space/upsert/
         """
+        # pylint: disable=too-many-arguments
+
+        self._schemaful_connection_check()
 
         if isinstance(space_name, str):
             space_name = self.schema.get_space(space_name).sid
@@ -1770,10 +1862,14 @@ def update(self, space_name, key, op_list, *, index=0, on_push=None, on_push_ctx
             :exc:`~tarantool.error.DatabaseError`,
             :exc:`~tarantool.error.SchemaError`,
             :exc:`~tarantool.error.NetworkError`,
-            :exc:`~tarantool.error.SslError`
+            :exc:`~tarantool.error.SslError`,
+            :exc:`~tarantool.error.NotSupportedError`
 
         .. _update: https://www.tarantool.io/en/doc/latest/reference/reference_lua/box_space/update/
         """
+        # pylint: disable=too-many-arguments
+
+        self._schemaful_connection_check()
 
         key = wrap_key(key)
         if isinstance(space_name, str):
@@ -1807,15 +1903,16 @@ def ping(self, notime=False):
         """
 
         request = RequestPing(self)
-        t0 = time.time()
+        start_time = time.time()
         self._send_request(request)
-        t1 = time.time()
+        finish_time = time.time()
 
         if notime:
             return "Success"
-        return t1 - t0
+        return finish_time - start_time
 
-    def select(self, space_name, key=None, *, offset=0, limit=0xffffffff, index=0, iterator=None, on_push=None, on_push_ctx=None):
+    def select(self, space_name, key=None, *, offset=0, limit=0xffffffff, index=0, iterator=None,
+               on_push=None, on_push_ctx=None):
         """
         Execute a SELECT request: `select`_ a tuple from the space.
 
@@ -1949,22 +2046,26 @@ def select(self, space_name, key=None, *, offset=0, limit=0xffffffff, index=0, i
 
         :param on_push_ctx: Сontext for working with on_push callback.
         :type on_push_ctx: optional
-        
+
         :rtype: :class:`~tarantool.response.Response`
 
         :raise: :exc:`~AssertionError`,
             :exc:`~tarantool.error.DatabaseError`,
             :exc:`~tarantool.error.SchemaError`,
             :exc:`~tarantool.error.NetworkError`,
-            :exc:`~tarantool.error.SslError`
+            :exc:`~tarantool.error.SslError`,
+            :exc:`~tarantool.error.NotSupportedError`
 
         .. _select: https://www.tarantool.io/en/doc/latest/reference/reference_lua/box_space/select/
         """
+        # pylint: disable=too-many-arguments
+
+        self._schemaful_connection_check()
 
         if iterator is None:
             iterator = ITERATOR_EQ
-            if key is None or (isinstance(key, (list, tuple)) and
-                               len(key) == 0):
+            if key is None or (isinstance(key, (list, tuple))
+                               and len(key) == 0):
                 iterator = ITERATOR_ALL
 
         # Perform smart type checking (scalar / list of scalars / list of
@@ -1996,6 +2097,8 @@ def space(self, space_name):
         :raise: :exc:`~tarantool.error.SchemaError`
         """
 
+        self._schemaful_connection_check()
+
         return Space(self, space_name)
 
     def generate_sync(self):
@@ -2076,33 +2179,47 @@ def _check_features(self):
             :exc:`~tarantool.error.SslError`
         """
 
-        try:
-            request = RequestProtocolVersion(self,
-                                             CONNECTOR_IPROTO_VERSION,
-                                             CONNECTOR_FEATURES)
-            response = self._send_request(request)
-            server_protocol_version = response.protocol_version
-            server_features = response.features
-            server_auth_type = response.auth_type
-        except DatabaseError as exc:
-            ER_UNKNOWN_REQUEST_TYPE = 48
-            if exc.code == ER_UNKNOWN_REQUEST_TYPE:
-                server_protocol_version = None
-                server_features = []
-                server_auth_type = None
+        if self.version_id >= version_id(2, 10, 0):
+            try:
+                request = RequestProtocolVersion(self,
+                                                 self._client_protocol_version,
+                                                 self._client_features)
+                response = self._send_request(request)
+                self._server_protocol_version = response.protocol_version
+                self._server_features = response.features
+                self._server_auth_type = response.auth_type
+            except DatabaseError as exc:
+                if exc.code != ER_UNKNOWN_REQUEST_TYPE:
+                    raise exc
+
+        if self.required_protocol_version is not None:
+            if self._server_protocol_version is None or \
+                    self._server_protocol_version < self.required_protocol_version:
+                raise ConfigurationError('Server protocol version is '
+                                         f'{self._server_protocol_version}, '
+                                         f'protocol version {self.required_protocol_version} '
+                                         'is required')
+
+        if self.required_features is not None:
+            if self._server_features is None:
+                failed_features = self.required_features
             else:
-                raise exc
+                failed_features = [val for val in self.required_features
+                                   if val not in self._server_features]
 
-        if server_protocol_version is not None:
-            self._protocol_version = min(server_protocol_version,
-                                         CONNECTOR_IPROTO_VERSION)
+            if len(failed_features) > 0:
+                str_features = ', '.join([str(v) for v in failed_features])
+                raise ConfigurationError(f'Server missing protocol features with id {str_features}')
 
-        # Intercept lists of features
-        features_list = [val for val in CONNECTOR_FEATURES if val in server_features]
-        for val in features_list:
-            self._features[val] = True
+        if self._server_protocol_version is not None:
+            self._protocol_version = min(self._server_protocol_version,
+                                         self._client_protocol_version)
 
-        self._server_auth_type = server_auth_type
+        # Intercept lists of features
+        if self._server_features is not None:
+            features_list = [val for val in self._client_features if val in self._server_features]
+            for val in features_list:
+                self._features[val] = True
 
     def _packer_factory(self):
         return self._packer_factory_impl(self)
@@ -2110,9 +2227,10 @@ def _packer_factory(self):
     def _unpacker_factory(self):
         return self._unpacker_factory_impl(self)
 
-    def crud_insert(self, space_name: str, values: Union[tuple, list], opts: dict={}) -> CrudResult:
+    def crud_insert(self, space_name: str, values: Union[tuple, list],
+                    opts: Optional[dict] = None) -> CrudResult:
         """
-        Inserts row through the 
+        Inserts row through the
         `crud <https://github.com/tarantool/crud#insert>`__.
 
         :param space_name: The name of the target space.
@@ -2132,18 +2250,21 @@ def crud_insert(self, space_name: str, values: Union[tuple, list], opts: dict={}
 
         assert isinstance(space_name, str)
         assert isinstance(values, (tuple, list))
+        if opts is None:
+            opts = {}
         assert isinstance(opts, dict)
 
         crud_resp = call_crud(self, "crud.insert", space_name, values, opts)
 
-        if crud_resp[1] is not None:
+        if len(crud_resp) > 1 and crud_resp[1] is not None:
             raise CrudModuleError(None, CrudError(crud_resp[1]))
 
         return CrudResult(crud_resp[0])
 
-    def crud_insert_object(self, space_name: str, values: dict, opts: dict={}) -> CrudResult:
+    def crud_insert_object(self, space_name: str, values: dict,
+                           opts: Optional[dict] = None) -> CrudResult:
         """
-        Inserts object row through the 
+        Inserts object row through the
         `crud <https://github.com/tarantool/crud#insert>`__.
 
         :param space_name: The name of the target space.
@@ -2163,18 +2284,21 @@ def crud_insert_object(self, space_name: str, values: dict, opts: dict={}) -> Cr
 
         assert isinstance(space_name, str)
         assert isinstance(values, dict)
+        if opts is None:
+            opts = {}
         assert isinstance(opts, dict)
 
         crud_resp = call_crud(self, "crud.insert_object", space_name, values, opts)
 
-        if crud_resp[1] is not None:
+        if len(crud_resp) > 1 and crud_resp[1] is not None:
             raise CrudModuleError(None, CrudError(crud_resp[1]))
 
         return CrudResult(crud_resp[0])
 
-    def crud_insert_many(self, space_name: str, values: Union[tuple, list], opts: dict={}) -> CrudResult:
+    def crud_insert_many(self, space_name: str, values: Union[tuple, list],
+                         opts: Optional[dict] = None) -> CrudResult:
         """
-        Inserts batch rows through the 
+        Inserts batch rows through the
         `crud <https://github.com/tarantool/crud#insert-many>`__.
 
         :param space_name: The name of the target space.
@@ -2194,6 +2318,8 @@ def crud_insert_many(self, space_name: str, values: Union[tuple, list], opts: di
 
         assert isinstance(space_name, str)
         assert isinstance(values, (tuple, list))
+        if opts is None:
+            opts = {}
         assert isinstance(opts, dict)
 
         crud_resp = call_crud(self, "crud.insert_many", space_name, values, opts)
@@ -2202,17 +2328,18 @@ def crud_insert_many(self, space_name: str, values: Union[tuple, list], opts: di
         if crud_resp[0] is not None:
             res = CrudResult(crud_resp[0])
 
-        if crud_resp[1] is not None:
-            errs = list()
+        if len(crud_resp) > 1 and crud_resp[1] is not None:
+            errs = []
             for err in crud_resp[1]:
                 errs.append(CrudError(err))
             raise CrudModuleManyError(res, errs)
 
         return res
 
-    def crud_insert_object_many(self, space_name: str, values: Union[tuple, list], opts: dict={}) -> CrudResult:
+    def crud_insert_object_many(self, space_name: str, values: Union[tuple, list],
+                                opts: Optional[dict] = None) -> CrudResult:
         """
-        Inserts batch object rows through the 
+        Inserts batch object rows through the
         `crud <https://github.com/tarantool/crud#insert-many>`__.
 
         :param space_name: The name of the target space.
@@ -2232,6 +2359,8 @@ def crud_insert_object_many(self, space_name: str, values: Union[tuple, list], o
 
         assert isinstance(space_name, str)
         assert isinstance(values, (tuple, list))
+        if opts is None:
+            opts = {}
         assert isinstance(opts, dict)
 
         crud_resp = call_crud(self, "crud.insert_object_many", space_name, values, opts)
@@ -2240,17 +2369,17 @@ def crud_insert_object_many(self, space_name: str, values: Union[tuple, list], o
         if crud_resp[0] is not None:
             res = CrudResult(crud_resp[0])
 
-        if crud_resp[1] is not None:
-            errs = list()
+        if len(crud_resp) > 1 and crud_resp[1] is not None:
+            errs = []
             for err in crud_resp[1]:
                 errs.append(CrudError(err))
             raise CrudModuleManyError(res, errs)
 
         return res
 
-    def crud_get(self, space_name: str, key: int, opts: dict={}) -> CrudResult:
+    def crud_get(self, space_name: str, key: int, opts: Optional[dict] = None) -> CrudResult:
         """
-        Gets row through the 
+        Gets row through the
         `crud <https://github.com/tarantool/crud#get>`__.
 
         :param space_name: The name of the target space.
@@ -2269,18 +2398,21 @@ def crud_get(self, space_name: str, key: int, opts: dict={}) -> CrudResult:
         """
 
         assert isinstance(space_name, str)
+        if opts is None:
+            opts = {}
         assert isinstance(opts, dict)
 
         crud_resp = call_crud(self, "crud.get", space_name, key, opts)
 
-        if crud_resp[1] is not None:
+        if len(crud_resp) > 1 and crud_resp[1] is not None:
             raise CrudModuleError(None, CrudError(crud_resp[1]))
 
         return CrudResult(crud_resp[0])
 
-    def crud_update(self, space_name: str, key: int, operations: list=[], opts: dict={}) -> CrudResult:
+    def crud_update(self, space_name: str, key: int, operations: Optional[list] = None,
+                    opts: Optional[dict] = None) -> CrudResult:
         """
-        Updates row through the 
+        Updates row through the
         `crud <https://github.com/tarantool/crud#update>`__.
 
         :param space_name: The name of the target space.
@@ -2302,19 +2434,23 @@ def crud_update(self, space_name: str, key: int, operations: list=[], opts: dict
         """
 
         assert isinstance(space_name, str)
+        if operations is None:
+            operations = []
         assert isinstance(operations, list)
+        if opts is None:
+            opts = {}
         assert isinstance(opts, dict)
 
         crud_resp = call_crud(self, "crud.update", space_name, key, operations, opts)
 
-        if crud_resp[1] is not None:
+        if len(crud_resp) > 1 and crud_resp[1] is not None:
             raise CrudModuleError(None, CrudError(crud_resp[1]))
 
         return CrudResult(crud_resp[0])
 
-    def crud_delete(self, space_name: str, key: int, opts: dict={}) -> CrudResult:
+    def crud_delete(self, space_name: str, key: int, opts: Optional[dict] = None) -> CrudResult:
         """
-        Deletes row through the 
+        Deletes row through the
         `crud <https://github.com/tarantool/crud#delete>`__.
 
         :param space_name: The name of the target space.
@@ -2333,18 +2469,21 @@ def crud_delete(self, space_name: str, key: int, opts: dict={}) -> CrudResult:
         """
 
         assert isinstance(space_name, str)
+        if opts is None:
+            opts = {}
         assert isinstance(opts, dict)
 
         crud_resp = call_crud(self, "crud.delete", space_name, key, opts)
 
-        if crud_resp[1] is not None:
+        if len(crud_resp) > 1 and crud_resp[1] is not None:
             raise CrudModuleError(None, CrudError(crud_resp[1]))
 
         return CrudResult(crud_resp[0])
 
-    def crud_replace(self, space_name: str, values: Union[tuple, list], opts: dict={}) -> CrudResult:
+    def crud_replace(self, space_name: str, values: Union[tuple, list],
+                     opts: Optional[dict] = None) -> CrudResult:
         """
-        Replaces row through the 
+        Replaces row through the
         `crud <https://github.com/tarantool/crud#replace>`__.
 
         :param space_name: The name of the target space.
@@ -2364,18 +2503,21 @@ def crud_replace(self, space_name: str, values: Union[tuple, list], opts: dict={
 
         assert isinstance(space_name, str)
         assert isinstance(values, (tuple, list))
+        if opts is None:
+            opts = {}
         assert isinstance(opts, dict)
 
         crud_resp = call_crud(self, "crud.replace", space_name, values, opts)
 
-        if crud_resp[1] is not None:
+        if len(crud_resp) > 1 and crud_resp[1] is not None:
             raise CrudModuleError(None, CrudError(crud_resp[1]))
 
         return CrudResult(crud_resp[0])
 
-    def crud_replace_object(self, space_name: str, values: dict, opts: dict={}) -> CrudResult:
+    def crud_replace_object(self, space_name: str, values: dict,
+                            opts: Optional[dict] = None) -> CrudResult:
         """
-        Replaces object row through the 
+        Replaces object row through the
         `crud <https://github.com/tarantool/crud#replace>`__.
 
         :param space_name: The name of the target space.
@@ -2395,18 +2537,21 @@ def crud_replace_object(self, space_name: str, values: dict, opts: dict={}) -> C
 
         assert isinstance(space_name, str)
         assert isinstance(values, dict)
+        if opts is None:
+            opts = {}
         assert isinstance(opts, dict)
 
         crud_resp = call_crud(self, "crud.replace_object", space_name, values, opts)
 
-        if crud_resp[1] is not None:
+        if len(crud_resp) > 1 and crud_resp[1] is not None:
             raise CrudModuleError(None, CrudError(crud_resp[1]))
 
         return CrudResult(crud_resp[0])
 
-    def crud_replace_many(self, space_name: str, values: Union[tuple, list], opts: dict={}) -> CrudResult:
+    def crud_replace_many(self, space_name: str, values: Union[tuple, list],
+                          opts: Optional[dict] = None) -> CrudResult:
         """
-        Replaces batch rows through the 
+        Replaces batch rows through the
         `crud <https://github.com/tarantool/crud#replace-many>`__.
 
         :param space_name: The name of the target space.
@@ -2426,6 +2571,8 @@ def crud_replace_many(self, space_name: str, values: Union[tuple, list], opts: d
 
         assert isinstance(space_name, str)
         assert isinstance(values, (tuple, list))
+        if opts is None:
+            opts = {}
         assert isinstance(opts, dict)
 
         crud_resp = call_crud(self, "crud.replace_many", space_name, values, opts)
@@ -2434,17 +2581,18 @@ def crud_replace_many(self, space_name: str, values: Union[tuple, list], opts: d
         if crud_resp[0] is not None:
             res = CrudResult(crud_resp[0])
 
-        if crud_resp[1] is not None:
-            errs = list()
+        if len(crud_resp) > 1 and crud_resp[1] is not None:
+            errs = []
             for err in crud_resp[1]:
                 errs.append(CrudError(err))
             raise CrudModuleManyError(res, errs)
 
         return res
 
-    def crud_replace_object_many(self, space_name: str, values: Union[tuple, list], opts: dict={}) -> CrudResult:
+    def crud_replace_object_many(self, space_name: str, values: Union[tuple, list],
+                                 opts: Optional[dict] = None) -> CrudResult:
         """
-        Replaces batch object rows through the 
+        Replaces batch object rows through the
         `crud <https://github.com/tarantool/crud#replace-many>`__.
 
         :param space_name: The name of the target space.
@@ -2464,6 +2612,8 @@ def crud_replace_object_many(self, space_name: str, values: Union[tuple, list],
 
         assert isinstance(space_name, str)
         assert isinstance(values, (tuple, list))
+        if opts is None:
+            opts = {}
         assert isinstance(opts, dict)
 
         crud_resp = call_crud(self, "crud.replace_object_many", space_name, values, opts)
@@ -2472,17 +2622,18 @@ def crud_replace_object_many(self, space_name: str, values: Union[tuple, list],
         if crud_resp[0] is not None:
             res = CrudResult(crud_resp[0])
 
-        if crud_resp[1] is not None:
-            errs = list()
+        if len(crud_resp) > 1 and crud_resp[1] is not None:
+            errs = []
             for err in crud_resp[1]:
                 errs.append(CrudError(err))
             raise CrudModuleManyError(res, errs)
 
         return res
 
-    def crud_upsert(self, space_name: str, values: Union[tuple, list], operations: list=[], opts: dict={}) -> CrudResult:
+    def crud_upsert(self, space_name: str, values: Union[tuple, list],
+                    operations: Optional[list] = None, opts: Optional[dict] = None) -> CrudResult:
         """
-        Upserts row through the 
+        Upserts row through the
         `crud <https://github.com/tarantool/crud#upsert>`__.
 
         :param space_name: The name of the target space.
@@ -2505,19 +2656,25 @@ def crud_upsert(self, space_name: str, values: Union[tuple, list], operations: l
 
         assert isinstance(space_name, str)
         assert isinstance(values, (tuple, list))
+        if operations is None:
+            operations = []
         assert isinstance(operations, list)
+        if opts is None:
+            opts = {}
         assert isinstance(opts, dict)
 
         crud_resp = call_crud(self, "crud.upsert", space_name, values, operations, opts)
 
-        if crud_resp[1] is not None:
+        if len(crud_resp) > 1 and crud_resp[1] is not None:
             raise CrudModuleError(None, CrudError(crud_resp[1]))
 
         return CrudResult(crud_resp[0])
 
-    def crud_upsert_object(self, space_name: str, values: dict, operations: list=[], opts: dict={}) -> CrudResult:
+    def crud_upsert_object(self, space_name: str, values: dict,
+                           operations: Optional[list] = None,
+                           opts: Optional[dict] = None) -> CrudResult:
         """
-        Upserts object row through the 
+        Upserts object row through the
         `crud <https://github.com/tarantool/crud#upsert>`__.
 
         :param space_name: The name of the target space.
@@ -2540,19 +2697,24 @@ def crud_upsert_object(self, space_name: str, values: dict, operations: list=[],
 
         assert isinstance(space_name, str)
         assert isinstance(values, dict)
+        if operations is None:
+            operations = []
         assert isinstance(operations, list)
+        if opts is None:
+            opts = {}
         assert isinstance(opts, dict)
 
         crud_resp = call_crud(self, "crud.upsert_object", space_name, values, operations, opts)
-        
-        if crud_resp[1] is not None:
+
+        if len(crud_resp) > 1 and crud_resp[1] is not None:
             raise CrudModuleError(None, CrudError(crud_resp[1]))
 
         return CrudResult(crud_resp[0])
 
-    def crud_upsert_many(self, space_name: str, values_operation: Union[tuple, list], opts: dict={}) -> CrudResult:
+    def crud_upsert_many(self, space_name: str, values_operation: Union[tuple, list],
+                         opts: Optional[dict] = None) -> CrudResult:
         """
-        Upserts batch rows through the 
+        Upserts batch rows through the
         `crud <https://github.com/tarantool/crud#upsert-many>`__.
 
         :param space_name: The name of the target space.
@@ -2572,6 +2734,8 @@ def crud_upsert_many(self, space_name: str, values_operation: Union[tuple, list]
 
         assert isinstance(space_name, str)
         assert isinstance(values_operation, (tuple, list))
+        if opts is None:
+            opts = {}
         assert isinstance(opts, dict)
 
         crud_resp = call_crud(self, "crud.upsert_many", space_name, values_operation, opts)
@@ -2580,17 +2744,18 @@ def crud_upsert_many(self, space_name: str, values_operation: Union[tuple, list]
         if crud_resp[0] is not None:
             res = CrudResult(crud_resp[0])
 
-        if crud_resp[1] is not None:
-            errs = list()
+        if len(crud_resp) > 1 and crud_resp[1] is not None:
+            errs = []
             for err in crud_resp[1]:
                 errs.append(CrudError(err))
             raise CrudModuleManyError(res, errs)
 
         return res
 
-    def crud_upsert_object_many(self, space_name: str, values_operation: Union[tuple, list], opts: dict={}) -> CrudResult:
+    def crud_upsert_object_many(self, space_name: str, values_operation: Union[tuple, list],
+                                opts: Optional[dict] = None) -> CrudResult:
         """
-        Upserts batch object rows through the 
+        Upserts batch object rows through the
         `crud <https://github.com/tarantool/crud#upsert-many>`__.
 
         :param space_name: The name of the target space.
@@ -2610,6 +2775,8 @@ def crud_upsert_object_many(self, space_name: str, values_operation: Union[tuple
 
         assert isinstance(space_name, str)
         assert isinstance(values_operation, (tuple, list))
+        if opts is None:
+            opts = {}
         assert isinstance(opts, dict)
 
         crud_resp = call_crud(self, "crud.upsert_object_many", space_name, values_operation, opts)
@@ -2618,17 +2785,18 @@ def crud_upsert_object_many(self, space_name: str, values_operation: Union[tuple
         if crud_resp[0] is not None:
             res = CrudResult(crud_resp[0])
 
-        if crud_resp[1] is not None:
-            errs = list()
+        if len(crud_resp) > 1 and crud_resp[1] is not None:
+            errs = []
             for err in crud_resp[1]:
                 errs.append(CrudError(err))
             raise CrudModuleManyError(res, errs)
 
         return res
 
-    def crud_select(self, space_name: str, conditions: list=[], opts: dict={}) -> CrudResult:
+    def crud_select(self, space_name: str, conditions: Optional[list] = None,
+                    opts: Optional[dict] = None) -> CrudResult:
         """
-        Selects rows through the 
+        Selects rows through the
         `crud <https://github.com/tarantool/crud#select>`__.
 
         :param space_name: The name of the target space.
@@ -2647,19 +2815,23 @@ def crud_select(self, space_name: str, conditions: list=[], opts: dict={}) -> Cr
         """
 
         assert isinstance(space_name, str)
-        assert isinstance(conditions, (tuple, list))
+        if conditions is None:
+            conditions = []
+        assert isinstance(conditions, list)
+        if opts is None:
+            opts = {}
         assert isinstance(opts, dict)
 
         crud_resp = call_crud(self, "crud.select", space_name, conditions, opts)
 
-        if crud_resp[1] is not None:
+        if len(crud_resp) > 1 and crud_resp[1] is not None:
             raise CrudModuleError(None, CrudError(crud_resp[1]))
 
         return CrudResult(crud_resp[0])
 
-    def crud_min(self, space_name: str, index_name: str, opts: dict={}) -> CrudResult:
+    def crud_min(self, space_name: str, index_name: str, opts: Optional[dict] = None) -> CrudResult:
         """
-        Gets rows with minimum value in the specified index through 
+        Gets rows with minimum value in the specified index through
         the `crud <https://github.com/tarantool/crud#min-and-max>`__.
 
         :param space_name: The name of the target space.
@@ -2678,18 +2850,20 @@ def crud_min(self, space_name: str, index_name: str, opts: dict={}) -> CrudResul
         """
 
         assert isinstance(space_name, str)
+        if opts is None:
+            opts = {}
         assert isinstance(opts, dict)
 
         crud_resp = call_crud(self, "crud.min", space_name, index_name, opts)
 
-        if crud_resp[1] is not None:
+        if len(crud_resp) > 1 and crud_resp[1] is not None:
             raise CrudModuleError(None, CrudError(crud_resp[1]))
 
         return CrudResult(crud_resp[0])
 
-    def crud_max(self, space_name: str, index_name: str, opts: dict={}) -> CrudResult:
+    def crud_max(self, space_name: str, index_name: str, opts: Optional[dict] = None) -> CrudResult:
         """
-        Gets rows with maximum value in the specified index through 
+        Gets rows with maximum value in the specified index through
         the `crud <https://github.com/tarantool/crud#min-and-max>`__.
 
         :param space_name: The name of the target space.
@@ -2708,18 +2882,20 @@ def crud_max(self, space_name: str, index_name: str, opts: dict={}) -> CrudResul
         """
 
         assert isinstance(space_name, str)
+        if opts is None:
+            opts = {}
         assert isinstance(opts, dict)
 
         crud_resp = call_crud(self, "crud.max", space_name, index_name, opts)
 
-        if crud_resp[1] is not None:
+        if len(crud_resp) > 1 and crud_resp[1] is not None:
             raise CrudModuleError(None, CrudError(crud_resp[1]))
 
         return CrudResult(crud_resp[0])
 
-    def crud_truncate(self, space_name: str, opts: dict={}) -> bool:
+    def crud_truncate(self, space_name: str, opts: Optional[dict] = None) -> bool:
         """
-        Truncate rows through 
+        Truncate rows through
         the `crud <https://github.com/tarantool/crud#truncate>`__.
 
         :param space_name: The name of the target space.
@@ -2735,20 +2911,20 @@ def crud_truncate(self, space_name: str, opts: dict={}) -> bool:
         """
 
         assert isinstance(space_name, str)
+        if opts is None:
+            opts = {}
         assert isinstance(opts, dict)
 
         crud_resp = call_crud(self, "crud.truncate", space_name, opts)
 
-        # In absence of an error, crud does not give 
-        # variable err as nil (as in most cases).
-        if len(crud_resp) != 1:
+        if len(crud_resp) > 1 and crud_resp[1] is not None:
             raise CrudModuleError(None, CrudError(crud_resp[1]))
 
         return crud_resp[0]
-    
-    def crud_len(self, space_name: str, opts: dict={}) -> int:
+
+    def crud_len(self, space_name: str, opts: Optional[dict] = None) -> int:
         """
-        Gets the number of tuples in the space through 
+        Gets the number of tuples in the space through
         the `crud <https://github.com/tarantool/crud#len>`__.
 
         :param space_name: The name of the target space.
@@ -2764,20 +2940,20 @@ def crud_len(self, space_name: str, opts: dict={}) -> int:
         """
 
         assert isinstance(space_name, str)
+        if opts is None:
+            opts = {}
         assert isinstance(opts, dict)
 
         crud_resp = call_crud(self, "crud.len", space_name, opts)
 
-        # In absence of an error, crud does not give 
-        # variable err as nil (as in most cases).
-        if len(crud_resp) != 1:
+        if len(crud_resp) > 1 and crud_resp[1] is not None:
             raise CrudModuleError(None, CrudError(crud_resp[1]))
 
         return crud_resp[0]
 
-    def crud_storage_info(self, opts: dict={}) -> dict:
+    def crud_storage_info(self, opts: Optional[dict] = None) -> dict:
         """
-        Gets storages status through the 
+        Gets storages status through the
         `crud <https://github.com/tarantool/crud#storage-info>`__.
 
         :param opts: The opts for the crud module.
@@ -2789,20 +2965,21 @@ def crud_storage_info(self, opts: dict={}) -> dict:
             :exc:`~tarantool.error.DatabaseError`
         """
 
+        if opts is None:
+            opts = {}
         assert isinstance(opts, dict)
 
         crud_resp = call_crud(self, "crud.storage_info", opts)
 
-        # In absence of an error, crud does not give 
-        # variable err as nil (as in most cases).
-        if len(crud_resp) != 1:
+        if len(crud_resp) > 1 and crud_resp[1] is not None:
             raise CrudModuleError(None, CrudError(crud_resp[1]))
 
         return crud_resp[0]
 
-    def crud_count(self, space_name: str, conditions: list=[], opts: dict={}) -> int:
+    def crud_count(self, space_name: str, conditions: Optional[list] = None,
+                   opts: Optional[dict] = None) -> int:
         """
-        Gets rows count through the 
+        Gets rows count through the
         `crud <https://github.com/tarantool/crud#count>`__.
 
         :param space_name: The name of the target space.
@@ -2821,19 +2998,23 @@ def crud_count(self, space_name: str, conditions: list=[], opts: dict={}) -> int
         """
 
         assert isinstance(space_name, str)
-        assert isinstance(conditions, (tuple, list))
+        if conditions is None:
+            conditions = []
+        assert isinstance(conditions, list)
+        if opts is None:
+            opts = {}
         assert isinstance(opts, dict)
 
         crud_resp = call_crud(self, "crud.count", space_name, conditions, opts)
 
-        if crud_resp[1] is not None:
+        if len(crud_resp) > 1 and crud_resp[1] is not None:
             raise CrudModuleError(None, CrudError(crud_resp[1]))
 
         return crud_resp[0]
 
-    def crud_stats(self, space_name: str=None) -> CrudResult:
+    def crud_stats(self, space_name: str = None) -> CrudResult:
         """
-        Gets statistics from the 
+        Gets statistics from the
         `crud <https://github.com/tarantool/crud#statistics>`__.
 
         :param space_name: The name of the target space.
@@ -2849,6 +3030,7 @@ def crud_stats(self, space_name: str=None) -> CrudResult:
 
         crud_resp = call_crud(self, "crud.stats", space_name)
 
+        # There are no errors in `crud.stats`.
         res = None
         if len(crud_resp.data[0]) > 0:
             res = CrudResult(crud_resp.data[0])
@@ -2857,7 +3039,7 @@ def crud_stats(self, space_name: str=None) -> CrudResult:
 
     def crud_unflatten_rows(self, rows: list, metadata: list) -> list:
         """
-        Makes rows unflatten through the 
+        Makes rows unflatten through the
         `crud <https://github.com/tarantool/crud#api>`__.
 
         :param rows: The rows to unflatten.
diff --git a/tarantool/connection_pool.py b/tarantool/connection_pool.py
index 362b7618..f1e675b3 100644
--- a/tarantool/connection_pool.py
+++ b/tarantool/connection_pool.py
@@ -1,6 +1,7 @@
 """
 This module provides API for interaction with Tarantool servers cluster.
 """
+# pylint: disable=too-many-lines,duplicate-code
 
 import abc
 import itertools
@@ -18,8 +19,6 @@
     POOL_INSTANCE_RECONNECT_MAX_ATTEMPTS,
     POOL_REFRESH_DELAY,
     SOCKET_TIMEOUT,
-    DEFAULT_SSL_PASSWORD,
-    DEFAULT_SSL_PASSWORD_FILE,
 )
 from tarantool.error import (
     ClusterConnectWarning,
@@ -93,13 +92,13 @@ class InstanceState():
     """
     :type: :class:`~tarantool.connection_pool.Status`
     """
-    ro: typing.Optional[bool] = None
+    read_only: typing.Optional[bool] = None
     """
     :type: :obj:`bool`, optional
     """
 
 
-def QueueFactory():
+def queue_factory():
     """
     Build a queue-based channel.
     """
@@ -116,7 +115,7 @@ class PoolUnit():
 
     addr: dict
     """
-    ``{"host": host, "port": port}`` info.
+    ``{"host": host, "port": port, "socket_fd": socket_fd}`` info.
 
     :type: :obj:`dict`
     """
@@ -126,14 +125,14 @@ class PoolUnit():
     :type: :class:`~tarantool.Connection`
     """
 
-    input_queue: queue.Queue = field(default_factory=QueueFactory)
+    input_queue: queue.Queue = field(default_factory=queue_factory)
     """
     Channel to pass requests for the server thread.
 
     :type: :obj:`queue.Queue`
     """
 
-    output_queue: queue.Queue = field(default_factory=QueueFactory)
+    output_queue: queue.Queue = field(default_factory=queue_factory)
     """
     Channel to receive responses from the server thread.
 
@@ -162,21 +161,31 @@ class PoolUnit():
     :type: :obj:`bool`
     """
 
+    def get_address(self):
+        """
+        Get an address string representation.
+        """
+        if self.addr['socket_fd'] is not None:
+            return f'fd://{self.addr["socket_fd"]}'
+        return f'{self.addr["host"]}:{self.addr["port"]}'
+
+
 # Based on https://realpython.com/python-interface/
 class StrategyInterface(metaclass=abc.ABCMeta):
     """
     Defines strategy to choose a pool server based on a request mode.
     """
+    # pylint: disable=bad-option-value,super-init-not-called
 
     @classmethod
     def __subclasshook__(cls, subclass):
-        return (hasattr(subclass, '__init__') and
-                callable(subclass.__init__) and
-                hasattr(subclass, 'update') and
-                callable(subclass.update) and
-                hasattr(subclass, 'getnext') and
-                callable(subclass.getnext) or
-                NotImplemented)
+        return (hasattr(subclass, '__init__')
+                and callable(subclass.__init__)
+                and hasattr(subclass, 'update')
+                and callable(subclass.update)
+                and hasattr(subclass, 'getnext')
+                and callable(subclass.getnext)
+                or NotImplemented)
 
     @abc.abstractmethod
     def __init__(self, pool):
@@ -205,10 +214,12 @@ def getnext(self, mode):
 
         raise NotImplementedError
 
+
 class RoundRobinStrategy(StrategyInterface):
     """
     Simple round-robin pool servers rotation.
     """
+    # pylint: disable=bad-option-value,no-self-use,super-init-not-called
 
     def __init__(self, pool):
         """
@@ -216,9 +227,9 @@ def __init__(self, pool):
             :class:`~tarantool.connection_pool.PoolUnit` objects
         """
 
-        self.ANY_iter = None
-        self.RW_iter = None
-        self.RO_iter = None
+        self.any_iter = None
+        self.rw_iter = None
+        self.ro_iter = None
         self.pool = pool
         self.rebuild_needed = True
 
@@ -228,9 +239,9 @@ def build(self):
         based on `box.info.ro`_ state.
         """
 
-        ANY_pool = []
-        RW_pool = []
-        RO_pool = []
+        any_pool = []
+        rw_pool = []
+        ro_pool = []
 
         for key in self.pool:
             state = self.pool[key].state
@@ -238,27 +249,27 @@ def build(self):
             if state.status == Status.UNHEALTHY:
                 continue
 
-            ANY_pool.append(key)
+            any_pool.append(key)
 
-            if state.ro == False:
-                RW_pool.append(key)
+            if state.read_only is False:
+                rw_pool.append(key)
             else:
-                RO_pool.append(key)
+                ro_pool.append(key)
 
-        if len(ANY_pool) > 0:
-            self.ANY_iter = itertools.cycle(ANY_pool)
+        if len(any_pool) > 0:
+            self.any_iter = itertools.cycle(any_pool)
         else:
-            self.ANY_iter = None
+            self.any_iter = None
 
-        if len(RW_pool) > 0:
-            self.RW_iter = itertools.cycle(RW_pool)
+        if len(rw_pool) > 0:
+            self.rw_iter = itertools.cycle(rw_pool)
         else:
-            self.RW_iter = None
+            self.rw_iter = None
 
-        if len(RO_pool) > 0:
-            self.RO_iter = itertools.cycle(RO_pool)
+        if len(ro_pool) > 0:
+            self.ro_iter = itertools.cycle(ro_pool)
         else:
-            self.RO_iter = None
+            self.ro_iter = None
 
         self.rebuild_needed = False
 
@@ -271,6 +282,27 @@ def update(self):
 
         self.rebuild_needed = True
 
+    def _getnext_by_mode(self, *iters, err_msg="Can't find healthy instance in pool"):
+        """
+        Get server from prioritized list of iterators.
+
+        :param iters: list of iterators
+        :type iters: :obj:`list`
+
+        :param err_msg: Error message to raise in case of error.
+        :type err_msg: :obj:`str`
+
+        :rtype: :class:`~tarantool.connection_pool.PoolUnit`
+
+        :raise: :exc:`~tarantool.error.PoolTolopogyError`
+
+        :meta private:
+        """
+        for itr in iters:
+            if itr is not None:
+                return next(itr)
+        raise PoolTolopogyError(err_msg)
+
     def getnext(self, mode):
         """
         Get server based on the request mode.
@@ -287,34 +319,19 @@ def getnext(self, mode):
             self.build()
 
         if mode == Mode.ANY:
-            if self.ANY_iter is not None:
-                return next(self.ANY_iter)
-            else:
-                raise PoolTolopogyError("Can't find healthy instance in pool")
-        elif mode == Mode.RW:
-            if self.RW_iter is not None:
-                return next(self.RW_iter)
-            else:
-                raise PoolTolopogyError("Can't find healthy rw instance in pool")
-        elif mode == Mode.RO:
-            if self.RO_iter is not None:
-                return next(self.RO_iter)
-            else:
-                raise PoolTolopogyError("Can't find healthy ro instance in pool")
-        elif mode == Mode.PREFER_RO:
-            if self.RO_iter is not None:
-                return next(self.RO_iter)
-            elif self.RW_iter is not None:
-                return next(self.RW_iter)
-            else:
-                raise PoolTolopogyError("Can't find healthy instance in pool")
-        elif mode == Mode.PREFER_RW:
-            if self.RW_iter is not None:
-                return next(self.RW_iter)
-            elif self.RO_iter is not None:
-                return next(self.RO_iter)
-            else:
-                raise PoolTolopogyError("Can't find healthy instance in pool")
+            return self._getnext_by_mode(self.any_iter)
+        if mode == Mode.RW:
+            return self._getnext_by_mode(self.rw_iter,
+                                         err_msg="Can't find healthy rw instance in pool")
+        if mode == Mode.RO:
+            return self._getnext_by_mode(self.ro_iter,
+                                         err_msg="Can't find healthy ro instance in pool")
+        if mode == Mode.PREFER_RO:
+            return self._getnext_by_mode(self.ro_iter, self.rw_iter)
+        if mode == Mode.PREFER_RW:
+            return self._getnext_by_mode(self.rw_iter, self.ro_iter)
+
+        raise ValueError(f"Unexpected mode {mode}")
 
 
 @dataclass
@@ -365,6 +382,7 @@ class ConnectionPool(ConnectionInterface):
         >>> resp
         - ['AAAA', 'Alpha']
     """
+    # pylint: disable=too-many-public-methods,duplicate-code,bad-option-value,no-self-use
 
     def __init__(self,
                  addrs,
@@ -378,7 +396,8 @@ def __init__(self,
                  call_16=False,
                  connection_timeout=CONNECTION_TIMEOUT,
                  strategy_class=RoundRobinStrategy,
-                 refresh_delay=POOL_REFRESH_DELAY):
+                 refresh_delay=POOL_REFRESH_DELAY,
+                 fetch_schema=True):
         """
         :param addrs: List of dictionaries describing server addresses:
 
@@ -387,6 +406,7 @@ def __init__(self,
                 {
                     "host': "str" or None,     # mandatory
                     "port": int or "str",      # mandatory
+                    "socket_fd": int,          # optional
                     "transport": "str",        # optional
                     "ssl_key_file": "str",     # optional
                     "ssl_cert_file": "str",    # optional
@@ -452,6 +472,9 @@ def __init__(self,
             `box.info.ro`_ status background refreshes, in seconds.
         :type connection_timeout: :obj:`float`, optional
 
+        :param fetch_schema: Refer to
+            :paramref:`~tarantool.Connection.params.fetch_schema`.
+
         :raise: :exc:`~tarantool.error.ConfigurationError`,
             :class:`~tarantool.Connection` exceptions
 
@@ -459,6 +482,7 @@ def __init__(self,
         .. _box.info.status:
         .. _box.info: https://www.tarantool.io/en/doc/latest/reference/reference_lua/box_info/
         """
+        # pylint: disable=too-many-arguments,too-many-locals,too-many-positional-arguments
 
         if not isinstance(addrs, list) or len(addrs) == 0:
             raise ConfigurationError("addrs must be non-empty list")
@@ -484,12 +508,13 @@ def __init__(self,
                 conn=Connection(
                     host=addr['host'],
                     port=addr['port'],
+                    socket_fd=addr['socket_fd'],
                     user=user,
                     password=password,
                     socket_timeout=socket_timeout,
                     reconnect_max_attempts=reconnect_max_attempts,
                     reconnect_delay=reconnect_delay,
-                    connect_now=False, # Connect in ConnectionPool.connect()
+                    connect_now=False,  # Connect in ConnectionPool.connect()
                     encoding=encoding,
                     call_16=call_16,
                     connection_timeout=connection_timeout,
@@ -500,7 +525,8 @@ def __init__(self,
                     ssl_ciphers=addr['ssl_ciphers'],
                     ssl_password=addr['ssl_password'],
                     ssl_password_file=addr['ssl_password_file'],
-                    auth_type=addr['auth_type'])
+                    auth_type=addr['auth_type'],
+                    fetch_schema=fetch_schema)
             )
 
         if connect_now:
@@ -513,15 +539,16 @@ def _make_key(self, addr):
         """
         Make a unique key for a server based on its address.
 
-        :param addr: `{"host": host, "port": port}` dictionary.
+        :param addr: `{"host": host, "port": port, "socket_fd": socket_fd}` dictionary.
         :type addr: :obj:`dict`
 
         :rtype: :obj:`str`
 
         :meta private:
         """
-
-        return '{0}:{1}'.format(addr['host'], addr['port'])
+        if addr['socket_fd'] is None:
+            return f"{addr['host']}:{addr['port']}"
+        return addr['socket_fd']
 
     def _get_new_state(self, unit):
         """
@@ -540,25 +567,25 @@ def _get_new_state(self, unit):
         if conn.is_closed():
             try:
                 conn.connect()
-            except NetworkError as e:
-                msg = "Failed to connect to {0}:{1}".format(
-                    unit.addr['host'], unit.addr['port'])
+            except NetworkError as exc:
+                msg = (f"Failed to connect to {unit.get_address()}, "
+                       f"reason: {repr(exc)}")
                 warn(msg, ClusterConnectWarning)
                 return InstanceState(Status.UNHEALTHY)
 
         try:
             resp = conn.call('box.info')
-        except NetworkError as e:
-            msg = "Failed to get box.info for {0}:{1}, reason: {2}".format(
-                unit.addr['host'], unit.addr['port'], repr(e))
+        except NetworkError as exc:
+            msg = (f"Failed to get box.info for {unit.get_address()}, "
+                   f"reason: {repr(exc)}")
             warn(msg, PoolTolopogyWarning)
             return InstanceState(Status.UNHEALTHY)
 
         try:
-            ro = resp.data[0]['ro']
-        except (IndexError, KeyError) as e:
-            msg = "Incorrect box.info response from {0}:{1}".format(
-                unit.addr['host'], unit.addr['port'])
+            read_only = resp.data[0]['ro']
+        except (IndexError, KeyError) as exc:
+            msg = (f"Incorrect box.info response from {unit.get_address()}"
+                   f"reason: {repr(exc)}")
             warn(msg, PoolTolopogyWarning)
             return InstanceState(Status.UNHEALTHY)
 
@@ -566,17 +593,16 @@ def _get_new_state(self, unit):
             status = resp.data[0]['status']
 
             if status != 'running':
-                msg = "{0}:{1} instance status is not 'running'".format(
-                    unit.addr['host'], unit.addr['port'])
+                msg = f"{unit.get_address()} instance status is not 'running'"
                 warn(msg, PoolTolopogyWarning)
                 return InstanceState(Status.UNHEALTHY)
-        except (IndexError, KeyError) as e:
-            msg = "Incorrect box.info response from {0}:{1}".format(
-                unit.addr['host'], unit.addr['port'])
+        except (IndexError, KeyError) as exc:
+            msg = (f"Incorrect box.info response from {unit.get_address()}"
+                   f"reason: {repr(exc)}")
             warn(msg, PoolTolopogyWarning)
             return InstanceState(Status.UNHEALTHY)
 
-        return InstanceState(Status.HEALTHY, ro)
+        return InstanceState(Status.HEALTHY, read_only)
 
     def _refresh_state(self, key):
         """
@@ -615,7 +641,7 @@ def is_closed(self):
         :rtype: :obj:`bool`
         """
 
-        return all(unit.request_processing_enabled == False for unit in self.pool.values())
+        return all(unit.request_processing_enabled is False for unit in self.pool.values())
 
     def _request_process_loop(self, key, unit, last_refresh):
         """
@@ -639,8 +665,8 @@ def _request_process_loop(self, key, unit, last_refresh):
                 method = getattr(Connection, task.method_name)
                 try:
                     resp = method(unit.conn, *task.args, **task.kwargs)
-                except Exception as e:
-                    unit.output_queue.put(e)
+                except Exception as exc:  # pylint: disable=bad-option-value,broad-exception-caught,broad-except
+                    unit.output_queue.put(exc)
                 else:
                     unit.output_queue.put(resp)
 
@@ -663,9 +689,7 @@ def connect(self):
         and refresh the info would be processed in the background.
         """
 
-        for key in self.pool:
-            unit = self.pool[key]
-
+        for key, unit in self.pool.items():
             self._refresh_state(key)
             last_refresh = time.time()
 
@@ -807,8 +831,10 @@ def replace(self, space_name, values, *, mode=Mode.RW, on_push=None, on_push_ctx
 
         .. _replace: https://www.tarantool.io/en/doc/latest/reference/reference_lua/box_space/replace/
         """
+        # pylint: disable=too-many-arguments
 
-        return self._send(mode, 'replace', space_name, values, on_push=on_push, on_push_ctx=on_push_ctx)
+        return self._send(mode, 'replace', space_name, values,
+                          on_push=on_push, on_push_ctx=on_push_ctx)
 
     def insert(self, space_name, values, *, mode=Mode.RW, on_push=None, on_push_ctx=None):
         """
@@ -836,8 +862,10 @@ def insert(self, space_name, values, *, mode=Mode.RW, on_push=None, on_push_ctx=
 
         .. _insert: https://www.tarantool.io/en/doc/latest/reference/reference_lua/box_space/insert/
         """
+        # pylint: disable=too-many-arguments
 
-        return self._send(mode, 'insert', space_name, values, on_push=on_push, on_push_ctx=on_push_ctx)
+        return self._send(mode, 'insert', space_name, values,
+                          on_push=on_push, on_push_ctx=on_push_ctx)
 
     def delete(self, space_name, key, *, index=0, mode=Mode.RW, on_push=None, on_push_ctx=None):
         """
@@ -868,10 +896,13 @@ def delete(self, space_name, key, *, index=0, mode=Mode.RW, on_push=None, on_pus
 
         .. _delete: https://www.tarantool.io/en/doc/latest/reference/reference_lua/box_space/delete/
         """
+        # pylint: disable=too-many-arguments
 
-        return self._send(mode, 'delete', space_name, key, index=index, on_push=on_push, on_push_ctx=on_push_ctx)
+        return self._send(mode, 'delete', space_name, key, index=index,
+                          on_push=on_push, on_push_ctx=on_push_ctx)
 
-    def upsert(self, space_name, tuple_value, op_list, *, index=0, mode=Mode.RW, on_push=None, on_push_ctx=None):
+    def upsert(self, space_name, tuple_value, op_list, *, index=0, mode=Mode.RW,
+               on_push=None, on_push_ctx=None):
         """
         Execute an UPSERT request on the pool server: `upsert`_ a tuple to
         the space. Refer to :meth:`~tarantool.Connection.upsert`.
@@ -903,11 +934,13 @@ def upsert(self, space_name, tuple_value, op_list, *, index=0, mode=Mode.RW, on_
 
         .. _upsert: https://www.tarantool.io/en/doc/latest/reference/reference_lua/box_space/upsert/
         """
+        # pylint: disable=too-many-arguments
 
         return self._send(mode, 'upsert', space_name, tuple_value,
-            op_list, index=index, on_push=on_push, on_push_ctx=on_push_ctx)
+                          op_list, index=index, on_push=on_push, on_push_ctx=on_push_ctx)
 
-    def update(self, space_name, key, op_list, *, index=0, mode=Mode.RW, on_push=None, on_push_ctx=None):
+    def update(self, space_name, key, op_list, *, index=0, mode=Mode.RW,
+               on_push=None, on_push_ctx=None):
         """
         Execute an UPDATE request on the pool server: `update`_ a tuple
         in the space. Refer to :meth:`~tarantool.Connection.update`.
@@ -939,9 +972,10 @@ def update(self, space_name, key, op_list, *, index=0, mode=Mode.RW, on_push=Non
 
         .. _update: https://www.tarantool.io/en/doc/latest/reference/reference_lua/box_space/update/
         """
+        # pylint: disable=too-many-arguments
 
-        return self._send(mode, 'update', space_name, key, 
-            op_list, index=index, on_push=on_push, on_push_ctx=on_push_ctx)
+        return self._send(mode, 'update', space_name, key,
+                          op_list, index=index, on_push=on_push, on_push_ctx=on_push_ctx)
 
     def ping(self, notime=False, *, mode=None):
         """
@@ -1005,6 +1039,7 @@ def select(self, space_name, key, *, offset=0, limit=0xffffffff,
 
         .. _select: https://www.tarantool.io/en/doc/latest/reference/reference_lua/box_space/select/
         """
+        # pylint: disable=too-many-arguments
 
         return self._send(mode, 'select', space_name, key, offset=offset, limit=limit,
                           index=index, iterator=iterator, on_push=on_push, on_push_ctx=on_push_ctx)
@@ -1034,10 +1069,10 @@ def execute(self, query, params=None, *, mode=None):
 
         return self._send(mode, 'execute', query, params)
 
-    def crud_insert(self, space_name, values, opts={}, *, mode=Mode.ANY):
+    def crud_insert(self, space_name, values, opts=None, *, mode=Mode.ANY):
         """
-        Execute an crud_insert request on the pool server: 
-        inserts row through the 
+        Execute an crud_insert request on the pool server:
+        inserts row through the
         `crud <https://github.com/tarantool/crud#insert>`__.
         Refer to :meth:`~tarantool.Connection.crud_insert`.
 
@@ -1061,10 +1096,10 @@ def crud_insert(self, space_name, values, opts={}, *, mode=Mode.ANY):
 
         return self._send(mode, 'crud_insert', space_name, values, opts)
 
-    def crud_insert_object(self, space_name, values, opts={}, *, mode=Mode.ANY):
+    def crud_insert_object(self, space_name, values, opts=None, *, mode=Mode.ANY):
         """
-        Execute an crud_insert_object request on the pool server: 
-        inserts object row through the 
+        Execute an crud_insert_object request on the pool server:
+        inserts object row through the
         `crud <https://github.com/tarantool/crud#insert>`__.
         Refer to :meth:`~tarantool.Connection.crud_insert_object`.
 
@@ -1088,10 +1123,10 @@ def crud_insert_object(self, space_name, values, opts={}, *, mode=Mode.ANY):
 
         return self._send(mode, 'crud_insert_object', space_name, values, opts)
 
-    def crud_insert_many(self, space_name, values, opts={}, *, mode=Mode.ANY):
+    def crud_insert_many(self, space_name, values, opts=None, *, mode=Mode.ANY):
         """
-        Execute an crud_insert_many request on the pool server: 
-        inserts batch rows through the 
+        Execute an crud_insert_many request on the pool server:
+        inserts batch rows through the
         `crud <https://github.com/tarantool/crud#insert-many>`__.
         Refer to :meth:`~tarantool.Connection.crud_insert_many`.
 
@@ -1115,9 +1150,9 @@ def crud_insert_many(self, space_name, values, opts={}, *, mode=Mode.ANY):
 
         return self._send(mode, 'crud_insert_many', space_name, values, opts)
 
-    def crud_insert_object_many(self, space_name, values, opts={}, *, mode=Mode.ANY):
+    def crud_insert_object_many(self, space_name, values, opts=None, *, mode=Mode.ANY):
         """
-        Execute an crud_insert_object_many request on the pool server: 
+        Execute an crud_insert_object_many request on the pool server:
         inserts batch object rows through the
         `crud <https://github.com/tarantool/crud#insert-many>`__.
         Refer to :meth:`~tarantool.Connection.crud_insert_object_many`.
@@ -1142,10 +1177,10 @@ def crud_insert_object_many(self, space_name, values, opts={}, *, mode=Mode.ANY)
 
         return self._send(mode, 'crud_insert_object_many', space_name, values, opts)
 
-    def crud_get(self, space_name, key, opts={}, *, mode=Mode.ANY):
+    def crud_get(self, space_name, key, opts=None, *, mode=Mode.ANY):
         """
-        Execute an crud_get request on the pool server: 
-        gets row through the 
+        Execute an crud_get request on the pool server:
+        gets row through the
         `crud <https://github.com/tarantool/crud#get>`__.
         Refer to :meth:`~tarantool.Connection.crud_get`.
 
@@ -1169,10 +1204,10 @@ def crud_get(self, space_name, key, opts={}, *, mode=Mode.ANY):
 
         return self._send(mode, 'crud_get', space_name, key, opts)
 
-    def crud_update(self, space_name, key, operations=[], opts={}, *, mode=Mode.ANY):
+    def crud_update(self, space_name, key, operations=None, opts=None, *, mode=Mode.ANY):
         """
-        Execute an crud_update request on the pool server: 
-        updates row through the 
+        Execute an crud_update request on the pool server:
+        updates row through the
         `crud <https://github.com/tarantool/crud#update>`__.
         Refer to :meth:`~tarantool.Connection.crud_update`.
 
@@ -1196,13 +1231,14 @@ def crud_update(self, space_name, key, operations=[], opts={}, *, mode=Mode.ANY)
         :raise: :exc:`~tarantool.error.CrudModuleError`,
             :exc:`~tarantool.error.DatabaseError`
         """
+        # pylint: disable=too-many-arguments
 
         return self._send(mode, 'crud_update', space_name, key, operations, opts)
 
-    def crud_delete(self, space_name, key, opts={}, *, mode=Mode.ANY):
+    def crud_delete(self, space_name, key, opts=None, *, mode=Mode.ANY):
         """
-        Execute an crud_delete request on the pool server: 
-        deletes row through the 
+        Execute an crud_delete request on the pool server:
+        deletes row through the
         `crud <https://github.com/tarantool/crud#delete>`__.
         Refer to :meth:`~tarantool.Connection.crud_delete`.
 
@@ -1226,10 +1262,10 @@ def crud_delete(self, space_name, key, opts={}, *, mode=Mode.ANY):
 
         return self._send(mode, 'crud_delete', space_name, key, opts)
 
-    def crud_replace(self, space_name, values, opts={}, *, mode=Mode.ANY):
+    def crud_replace(self, space_name, values, opts=None, *, mode=Mode.ANY):
         """
-        Execute an crud_replace request on the pool server: 
-        replaces row through the 
+        Execute an crud_replace request on the pool server:
+        replaces row through the
         `crud <https://github.com/tarantool/crud#replace>`__.
         Refer to :meth:`~tarantool.Connection.crud_replace`.
 
@@ -1253,10 +1289,10 @@ def crud_replace(self, space_name, values, opts={}, *, mode=Mode.ANY):
 
         return self._send(mode, 'crud_replace', space_name, values, opts)
 
-    def crud_replace_object(self, space_name, values, opts={}, *, mode=Mode.ANY):
+    def crud_replace_object(self, space_name, values, opts=None, *, mode=Mode.ANY):
         """
-        Execute an crud_replace_object request on the pool server: 
-        replaces object row through the 
+        Execute an crud_replace_object request on the pool server:
+        replaces object row through the
         `crud <https://github.com/tarantool/crud#replace>`__.
         Refer to :meth:`~tarantool.Connection.crud_replace_object`.
 
@@ -1280,10 +1316,10 @@ def crud_replace_object(self, space_name, values, opts={}, *, mode=Mode.ANY):
 
         return self._send(mode, 'crud_replace_object', space_name, values, opts)
 
-    def crud_replace_many(self, space_name, values, opts={}, *, mode=Mode.ANY):
+    def crud_replace_many(self, space_name, values, opts=None, *, mode=Mode.ANY):
         """
-        Execute an crud_replace_many request on the pool server: 
-        replaces batch rows through the 
+        Execute an crud_replace_many request on the pool server:
+        replaces batch rows through the
         `crud <https://github.com/tarantool/crud#replace-many>`__.
         Refer to :meth:`~tarantool.Connection.crud_replace_many`.
 
@@ -1307,10 +1343,10 @@ def crud_replace_many(self, space_name, values, opts={}, *, mode=Mode.ANY):
 
         return self._send(mode, 'crud_replace_many', space_name, values, opts)
 
-    def crud_replace_object_many(self, space_name, values, opts={}, *, mode=Mode.ANY):
+    def crud_replace_object_many(self, space_name, values, opts=None, *, mode=Mode.ANY):
         """
-        Execute an crud_replace_object_many request on the pool server: 
-        replaces batch object rows through the 
+        Execute an crud_replace_object_many request on the pool server:
+        replaces batch object rows through the
         `crud <https://github.com/tarantool/crud#replace-many>`__.
         Refer to :meth:`~tarantool.Connection.crud_replace_object_many`.
 
@@ -1334,10 +1370,10 @@ def crud_replace_object_many(self, space_name, values, opts={}, *, mode=Mode.ANY
 
         return self._send(mode, 'crud_replace_object_many', space_name, values, opts)
 
-    def crud_upsert(self, space_name, values, operations=[], opts={}, *, mode=Mode.ANY):
+    def crud_upsert(self, space_name, values, operations=None, opts=None, *, mode=Mode.ANY):
         """
-        Execute an crud_upsert request on the pool server: 
-        upserts row through the 
+        Execute an crud_upsert request on the pool server:
+        upserts row through the
         `crud <https://github.com/tarantool/crud#upsert>`__.
         Refer to :meth:`~tarantool.Connection.crud_upsert`.
 
@@ -1361,13 +1397,14 @@ def crud_upsert(self, space_name, values, operations=[], opts={}, *, mode=Mode.A
         :raise: :exc:`~tarantool.error.CrudModuleError`,
             :exc:`~tarantool.error.DatabaseError`
         """
+        # pylint: disable=too-many-arguments
 
         return self._send(mode, 'crud_upsert', space_name, values, operations, opts)
 
-    def crud_upsert_object(self, space_name, values, operations=[], opts={}, *, mode=Mode.ANY):
+    def crud_upsert_object(self, space_name, values, operations=None, opts=None, *, mode=Mode.ANY):
         """
-        Execute an crud_upsert_object request on the pool server: 
-        upserts object row through the 
+        Execute an crud_upsert_object request on the pool server:
+        upserts object row through the
         `crud <https://github.com/tarantool/crud#upsert>`__.
         Refer to :meth:`~tarantool.Connection.crud_upsert_object`.
 
@@ -1391,13 +1428,14 @@ def crud_upsert_object(self, space_name, values, operations=[], opts={}, *, mode
         :raise: :exc:`~tarantool.error.CrudModuleError`,
             :exc:`~tarantool.error.DatabaseError`
         """
+        # pylint: disable=too-many-arguments
 
         return self._send(mode, 'crud_upsert_object', space_name, values, operations, opts)
 
-    def crud_upsert_many(self, space_name, values_operation, opts={}, *, mode=Mode.ANY):
+    def crud_upsert_many(self, space_name, values_operation, opts=None, *, mode=Mode.ANY):
         """
-        Execute an crud_upsert_many request on the pool server: 
-        upserts batch rows through the 
+        Execute an crud_upsert_many request on the pool server:
+        upserts batch rows through the
         `crud <https://github.com/tarantool/crud#upsert-many>`__.
         Refer to :meth:`~tarantool.Connection.crud_upsert_many`.
 
@@ -1421,10 +1459,10 @@ def crud_upsert_many(self, space_name, values_operation, opts={}, *, mode=Mode.A
 
         return self._send(mode, 'crud_upsert_many', space_name, values_operation, opts)
 
-    def crud_upsert_object_many(self, space_name, values_operation, opts={}, *, mode=Mode.ANY):
+    def crud_upsert_object_many(self, space_name, values_operation, opts=None, *, mode=Mode.ANY):
         """
-        Execute an crud_upsert_object_many request on the pool server: 
-        upserts batch object rows through the 
+        Execute an crud_upsert_object_many request on the pool server:
+        upserts batch object rows through the
         `crud <https://github.com/tarantool/crud#upsert-many>`__.
         Refer to :meth:`~tarantool.Connection.crud_upsert_object_many`.
 
@@ -1448,10 +1486,10 @@ def crud_upsert_object_many(self, space_name, values_operation, opts={}, *, mode
 
         return self._send(mode, 'crud_upsert_object_many', space_name, values_operation, opts)
 
-    def crud_select(self, space_name, conditions=[], opts={}, *, mode=Mode.ANY):
+    def crud_select(self, space_name, conditions=None, opts=None, *, mode=Mode.ANY):
         """
-        Execute an crud_select request on the pool server: 
-        selects rows through the 
+        Execute an crud_select request on the pool server:
+        selects rows through the
         `crud <https://github.com/tarantool/crud#select>`__.
         Refer to :meth:`~tarantool.Connection.crud_select`.
 
@@ -1475,10 +1513,10 @@ def crud_select(self, space_name, conditions=[], opts={}, *, mode=Mode.ANY):
 
         return self._send(mode, 'crud_select', space_name, conditions, opts)
 
-    def crud_min(self, space_name, index_name, opts={}, *, mode=Mode.ANY):
+    def crud_min(self, space_name, index_name, opts=None, *, mode=Mode.ANY):
         """
-        Execute an crud_min request on the pool server: 
-        gets rows with minimum value in the specified index through 
+        Execute an crud_min request on the pool server:
+        gets rows with minimum value in the specified index through
         `crud <https://github.com/tarantool/crud#min-and-max>`__.
         Refer to :meth:`~tarantool.Connection.crud_min`.
 
@@ -1502,10 +1540,10 @@ def crud_min(self, space_name, index_name, opts={}, *, mode=Mode.ANY):
 
         return self._send(mode, 'crud_min', space_name, index_name, opts)
 
-    def crud_max(self, space_name, index_name, opts={}, *, mode=Mode.ANY):
+    def crud_max(self, space_name, index_name, opts=None, *, mode=Mode.ANY):
         """
-        Execute an crud_max request on the pool server: 
-        gets rows with maximum value in the specified index through 
+        Execute an crud_max request on the pool server:
+        gets rows with maximum value in the specified index through
         `crud <https://github.com/tarantool/crud#min-and-max>`__.
         Refer to :meth:`~tarantool.Connection.crud_max`.
 
@@ -1529,10 +1567,10 @@ def crud_max(self, space_name, index_name, opts={}, *, mode=Mode.ANY):
 
         return self._send(mode, 'crud_max', space_name, index_name, opts)
 
-    def crud_len(self, space_name, opts={}, *, mode=Mode.ANY):
+    def crud_len(self, space_name, opts=None, *, mode=Mode.ANY):
         """
-        Execute an crud_len request on the pool server: 
-        gets the number of tuples in the space through 
+        Execute an crud_len request on the pool server:
+        gets the number of tuples in the space through
         `crud <https://github.com/tarantool/crud#len>`__.
         Refer to :meth:`~tarantool.Connection.crud_len`.
 
@@ -1553,10 +1591,10 @@ def crud_len(self, space_name, opts={}, *, mode=Mode.ANY):
 
         return self._send(mode, 'crud_len', space_name, opts)
 
-    def crud_storage_info(self, opts={}, *, mode=Mode.ANY):
+    def crud_storage_info(self, opts=None, *, mode=Mode.ANY):
         """
-        Execute an crud_storage_info request on the pool server: 
-        gets storages status through the 
+        Execute an crud_storage_info request on the pool server:
+        gets storages status through the
         `crud <https://github.com/tarantool/crud#storage-info>`__.
         Refer to :meth:`~tarantool.Connection.crud_storage_info`.
 
@@ -1574,10 +1612,10 @@ def crud_storage_info(self, opts={}, *, mode=Mode.ANY):
 
         return self._send(mode, 'crud_storage_info', opts)
 
-    def crud_count(self, space_name, conditions=[], opts={}, *, mode=Mode.ANY):
+    def crud_count(self, space_name, conditions=None, opts=None, *, mode=Mode.ANY):
         """
-        Execute an crud_count request on the pool server: 
-        gets rows count through the 
+        Execute an crud_count request on the pool server:
+        gets rows count through the
         `crud <https://github.com/tarantool/crud#count>`__.
         Refer to :meth:`~tarantool.Connection.crud_count`.
 
@@ -1603,8 +1641,8 @@ def crud_count(self, space_name, conditions=[], opts={}, *, mode=Mode.ANY):
 
     def crud_stats(self, space_name=None, *, mode=Mode.ANY):
         """
-        Execute an crud_stats request on the pool server: 
-        gets statistics through the 
+        Execute an crud_stats request on the pool server:
+        gets statistics through the
         `crud <https://github.com/tarantool/crud#statistics>`__.
         Refer to :meth:`~tarantool.Connection.crud_stats`.
 
@@ -1624,7 +1662,7 @@ def crud_stats(self, space_name=None, *, mode=Mode.ANY):
 
     def crud_unflatten_rows(self, rows, metadata, *, mode=Mode.ANY):
         """
-        Makes rows unflatten through the 
+        Makes rows unflatten through the
         `crud <https://github.com/tarantool/crud#api>`__.
         Refer to :meth:`~tarantool.Connection.crud_unflatten_rows`.
 
@@ -1645,10 +1683,10 @@ def crud_unflatten_rows(self, rows, metadata, *, mode=Mode.ANY):
 
         return self._send(mode, 'crud_unflatten_rows', rows, metadata)
 
-    def crud_truncate(self, space_name, opts={}, *, mode=Mode.ANY):
+    def crud_truncate(self, space_name, opts=None, *, mode=Mode.ANY):
         """
-        Execute an crud_truncate request on the pool server: 
-        truncates rows through 
+        Execute an crud_truncate request on the pool server:
+        truncates rows through
         `crud <https://github.com/tarantool/crud#truncate>`__.
         Refer to :meth:`~tarantool.Connection.crud_truncate`.
 
diff --git a/tarantool/const.py b/tarantool/const.py
index 6b12598d..53749cec 100644
--- a/tarantool/const.py
+++ b/tarantool/const.py
@@ -1,4 +1,6 @@
-# pylint: disable=C0301,W0105,W0401,W0614
+"""
+This module a set of constants for the package.
+"""
 
 IPROTO_REQUEST_TYPE = 0x00
 IPROTO_SYNC = 0x01
@@ -97,7 +99,16 @@
 IPROTO_FEATURE_TRANSACTIONS = 1
 IPROTO_FEATURE_ERROR_EXTENSION = 2
 IPROTO_FEATURE_WATCHERS = 3
+IPROTO_FEATURE_PAGINATION = 4
+IPROTO_FEATURE_SPACE_AND_INDEX_NAMES = 5
+IPROTO_FEATURE_WATCH_ONCE = 6
 
+# Default value for host.
+DEFAULT_HOST = None
+# Default value for port.
+DEFAULT_PORT = None
+# Default value for socket_fd.
+DEFAULT_SOCKET_FD = None
 # Default value for connection timeout (seconds)
 CONNECTION_TIMEOUT = None
 # Default value for socket timeout (seconds)
@@ -131,10 +142,10 @@
 # Default delay between attempts to reconnect (seconds)
 POOL_INSTANCE_RECONNECT_DELAY = 0
 
-# Tarantool 2.10 protocol version is 3
-CONNECTOR_IPROTO_VERSION = 3
+# Tarantool master 970ea48 protocol version is 6
+CONNECTOR_IPROTO_VERSION = 6
 # List of connector-supported features
-CONNECTOR_FEATURES = [IPROTO_FEATURE_ERROR_EXTENSION,]
+CONNECTOR_FEATURES = [IPROTO_FEATURE_ERROR_EXTENSION]
 
 # Authenticate with CHAP-SHA1 (Tarantool CE and EE)
 AUTH_TYPE_CHAP_SHA1 = "chap-sha1"
diff --git a/tarantool/crud.py b/tarantool/crud.py
index dee1be36..3a642564 100644
--- a/tarantool/crud.py
+++ b/tarantool/crud.py
@@ -7,13 +7,14 @@
 from tarantool.error import DatabaseError, ER_NO_SUCH_PROC, ER_ACCESS_DENIED
 
 
-class CrudResponse(object):
+class CrudResponse():
     """
-    Contains response fields from the `crud`_ module that correspond 
+    Contains response fields from the `crud`_ module that correspond
     to the Lua implementation.
 
     .. _crud: https://github.com/tarantool/crud/
     """
+    # pylint: disable=too-few-public-methods
 
     def __init__(self, response):
         """
@@ -33,16 +34,16 @@ def __init__(self, response):
             raise RuntimeError('Unable to decode response to object due to unknown type')
 
 
-class CrudResult(CrudResponse):
+class CrudResult(CrudResponse):  # pylint: disable=too-few-public-methods
     """
-    Contains result's fields from result variable 
+    Contains result's fields from result variable
     of crud module operation.
     """
 
 
-class CrudError(CrudResponse):
+class CrudError(CrudResponse):  # pylint: disable=too-few-public-methods
     """
-    Contains error's fields from error variable 
+    Contains error's fields from error variable
     of crud module operation.
     """
 
@@ -64,9 +65,10 @@ def call_crud(conn, *args):
 
     try:
         crud_resp = conn.call(*args)
-    except DatabaseError as e:
-        if e.code == ER_NO_SUCH_PROC or e.code == ER_ACCESS_DENIED:
+    except DatabaseError as exc:
+        if exc.code in (ER_NO_SUCH_PROC, ER_ACCESS_DENIED):
             exc_msg = ". Ensure that you're calling crud.router and user has sufficient grants"
-            raise DatabaseError(e.code, e.message + exc_msg, extra_info=e.extra_info) from e
+            raise DatabaseError(exc.code, exc.message + exc_msg, extra_info=exc.extra_info) from exc
+        raise exc
 
     return crud_resp
diff --git a/tarantool/dbapi.py b/tarantool/dbapi.py
index f6f5d2ab..3b4d1013 100644
--- a/tarantool/dbapi.py
+++ b/tarantool/dbapi.py
@@ -3,11 +3,24 @@
 
 .. _PEP-249: http://www.python.org/dev/peps/pep-0249/
 """
+# pylint: disable=fixme,unused-import,bad-option-value,no-self-use
+# flake8: noqa: F401
 
 from tarantool.connection import Connection as BaseConnection
-from tarantool.error import *
-
-
+from tarantool.error import (
+    Error,
+    InterfaceError,
+    DatabaseError,
+    OperationalError,
+    IntegrityError,
+    InternalError,
+    ProgrammingError,
+    NotSupportedError,
+)
+
+Warning = Warning  # pylint: disable=redefined-builtin,self-assigning-variable
+
+# pylint: disable=invalid-name
 paramstyle = 'named'
 apilevel = "2.0"
 threadsafety = 1
@@ -50,6 +63,11 @@ def callproc(self, procname, *params):
 
     @property
     def rows(self):
+        """
+        Returns the current count of rows in cursor.
+
+        :type: :obj:`int`
+        """
         return self._rows
 
     @property
@@ -278,7 +296,7 @@ def __init__(self, *args, **kwargs):
         :raise: :class:`~tarantool.Connection` exceptions
         """
 
-        super(Connection, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
         self._set_autocommit(kwargs.get('autocommit', True))
 
     def _set_autocommit(self, autocommit):
@@ -291,7 +309,7 @@ def _set_autocommit(self, autocommit):
 
         if not isinstance(autocommit, bool):
             raise InterfaceError("autocommit parameter must be boolean, "
-                                 "not %s" % autocommit.__class__.__name__)
+                                 f"not {autocommit.__class__.__name__}")
         if autocommit is False:
             raise NotSupportedError("The connector supports "
                                     "only autocommit mode")
@@ -337,7 +355,7 @@ def close(self):
         """
 
         self._check_not_closed("The closed connector can not be closed again.")
-        super(Connection, self).close()
+        super().close()
 
     def commit(self):
         """
diff --git a/tarantool/error.py b/tarantool/error.py
index 29c2430f..85e30c03 100644
--- a/tarantool/error.py
+++ b/tarantool/error.py
@@ -1,4 +1,3 @@
-# pylint: disable=C0301,W0105,W0401,W0614
 """
 Python DB API compatible exceptions, see `PEP-249`_.
 
@@ -7,22 +6,10 @@
 
 import os
 import socket
-try:
-    import ssl
-    is_ssl_supported = True
-except ImportError:
-    is_ssl_supported = False
 import sys
 import warnings
 
 
-
-class Warning(Exception):
-    """
-    Exception raised for important warnings
-    like data truncations while inserting, etc.
-    """
-
 class Error(Exception):
     """
     Base class for error exceptions.
@@ -124,6 +111,7 @@ class ConfigurationError(Error):
     Error of initialization with a user-provided configuration.
     """
 
+
 class MsgpackError(Error):
     """
     Error with encoding or decoding of `MP_EXT`_ types.
@@ -131,11 +119,13 @@ class MsgpackError(Error):
     .. _MP_EXT: https://www.tarantool.io/en/doc/latest/dev_guide/internals/msgpack_extensions/
     """
 
+
 class MsgpackWarning(UserWarning):
     """
     Warning with encoding or decoding of `MP_EXT`_ types.
     """
 
+
 # Monkey patch os.strerror for win32
 if sys.platform == "win32":
     # Windows Sockets Error Codes (not all, but related on network errors)
@@ -194,8 +184,8 @@ def os_strerror_patched(code):
         message = os_strerror_orig(code)
         if not message.startswith("Unknown"):
             return message
-        else:
-            return _code2str.get(code, "Unknown error %s" % code)
+
+        return _code2str.get(code, f"Unknown error {code}")
 
     os.strerror = os_strerror_patched
     del os_strerror_patched
@@ -211,7 +201,7 @@ def __init__(self, value):
         :param value: Error value.
         """
 
-        super(SchemaError, self).__init__(0, value)
+        super().__init__(0, value)
         self.value = value
 
     def __str__(self):
@@ -232,7 +222,7 @@ def __init__(self, message, schema_version):
         :type schema_version: :obj:`int`
         """
 
-        super(SchemaReloadException, self).__init__(109, message)
+        super().__init__(109, message)
         self.schema_version = schema_version
 
     def __str__(self):
@@ -244,72 +234,79 @@ class NetworkError(DatabaseError):
     Error related to network.
     """
 
-    def __init__(self, orig_exception=None, *args, **kwargs):
+    def __init__(self, *args, **kwargs):
         """
-        :param orig_exception: Exception to wrap.
-        :type orig_exception: optional
+        :param args: Exception arguments. If the first argument is
+           a socket exception, it is wrapped.
+        :type args: :obj:`tuple`, optional
 
-        :param args: Wrapped exception arguments.
-        :type args: :obj:`tuple`
+        :param kwargs: Exception to wrap.
+        :type args: :obj:`dict`, optional
         """
 
         self.errno = 0
-        if hasattr(orig_exception, 'errno'):
-            self.errno = orig_exception.errno
-        if orig_exception:
+
+        if len(args) > 0:
+            orig_exception = args[0]
+
+            if hasattr(orig_exception, 'errno'):
+                self.errno = orig_exception.errno
+
             if isinstance(orig_exception, socket.timeout):
                 self.message = "Socket timeout"
-                super(NetworkError, self).__init__(0, self.message)
-            elif isinstance(orig_exception, socket.error):
+                super().__init__(0, self.message)
+                return
+
+            if isinstance(orig_exception, socket.error):
                 self.message = os.strerror(orig_exception.errno)
-                super(NetworkError, self).__init__(
-                    orig_exception.errno, self.message)
-            else:
-                super(NetworkError, self).__init__(orig_exception, *args, **kwargs)
+                super().__init__(orig_exception.errno, self.message)
+                return
+
+        super().__init__(*args, **kwargs)
 
 
 class NetworkWarning(UserWarning):
     """
     Warning related to network.
     """
-    pass
+
 
 class SslError(DatabaseError):
     """
     Error related to SSL.
     """
 
-    def __init__(self, orig_exception=None, *args):
+    def __init__(self, *args, **kwargs):
         """
-        :param orig_exception: Exception to wrap.
-        :type orig_exception: optional
+        :param args: Exception arguments. If the first argument is
+           a socket exception, it is wrapped.
+        :type args: :obj:`tuple`, optional
 
-        :param args: Wrapped exception arguments.
-        :type args: :obj:`tuple`
+        :param kwargs: Exception to wrap.
+        :type args: :obj:`dict`, optional
         """
 
         self.errno = 0
-        if hasattr(orig_exception, 'errno'):
-            self.errno = orig_exception.errno
-        if orig_exception:
-            if is_ssl_supported and isinstance(orig_exception, ssl.SSLError):
-                super(SslError, self).__init__(orig_exception, *args)
-            else:
-                super(SslError, self).__init__(orig_exception, *args)
+
+        if len(args) > 0:
+            orig_exception = args[0]
+
+            if hasattr(orig_exception, 'errno'):
+                self.errno = orig_exception.errno
+
+        super().__init__(*args, **kwargs)
 
 
 class ClusterDiscoveryWarning(UserWarning):
     """
     Warning related to cluster discovery.
     """
-    pass
 
 
 class ClusterConnectWarning(UserWarning):
     """
     Warning related to cluster pool connection.
     """
-    pass
 
 
 class PoolTolopogyWarning(UserWarning):
@@ -317,7 +314,6 @@ class PoolTolopogyWarning(UserWarning):
     Warning related to unsatisfying `box.info.ro`_ state of
     pool instances.
     """
-    pass
 
 
 class PoolTolopogyError(DatabaseError):
@@ -327,7 +323,6 @@ class PoolTolopogyError(DatabaseError):
 
     .. _box.info.ro: https://www.tarantool.io/en/doc/latest/reference/reference_lua/box_info/
     """
-    pass
 
 
 class CrudModuleError(DatabaseError):
@@ -341,12 +336,12 @@ class CrudModuleError(DatabaseError):
     def __init__(self, _, error):
         """
         Sets fields with result and errors.
-        
+
         :param args: The tuple from the crud module with result and errors.
         :type args: :obj:`tuple`
         """
 
-        super(CrudModuleError, self).__init__(0, error.err)
+        super().__init__(0, error.err)
         # Sets tarantool.crud.CrudError object.
         self.extra_info_error = error
 
@@ -362,13 +357,13 @@ class CrudModuleManyError(DatabaseError):
     def __init__(self, success, error):
         """
         Sets fields with result and errors.
-        
+
         :param args: The tuple from the crud module with result and errors.
         :type args: :obj:`tuple`
         """
 
         exc_msg = "Got multiple errors, see errors_list and success_list"
-        super(CrudModuleManyError, self).__init__(0, exc_msg)
+        super().__init__(0, exc_msg)
         # Sets list of tarantool.crud.CrudResult objects.
         self.success_list = success
         # Sets list of tarantool.crud.CrudError objects.
@@ -390,8 +385,9 @@ def warn(message, warning_class):
     :param warning_class: Warning class.
     :type warning_class: :class:`~tarantool.error.Warning`
     """
+    # pylint: disable=protected-access
 
-    frame = sys._getframe(2)  # pylint: disable=W0212
+    frame = sys._getframe(2)
     module_name = frame.f_globals.get("__name__")
     line_no = frame.f_lineno
     warnings.warn_explicit(message, warning_class, module_name, line_no)
diff --git a/tarantool/mesh_connection.py b/tarantool/mesh_connection.py
index cc4def5a..02a20d7d 100644
--- a/tarantool/mesh_connection.py
+++ b/tarantool/mesh_connection.py
@@ -1,6 +1,7 @@
 """
 This module provides API for interaction with Tarantool servers cluster.
 """
+# pylint: disable=fixme,duplicate-code
 
 import time
 
@@ -27,6 +28,9 @@
     DEFAULT_SSL_PASSWORD,
     DEFAULT_SSL_PASSWORD_FILE,
     CLUSTER_DISCOVERY_DELAY,
+    DEFAULT_HOST,
+    DEFAULT_SOCKET_FD,
+    DEFAULT_PORT,
 )
 
 from tarantool.request import (
@@ -34,6 +38,9 @@
 )
 
 default_addr_opts = {
+    'host': DEFAULT_HOST,
+    'port': DEFAULT_PORT,
+    'socket_fd': DEFAULT_SOCKET_FD,
     'transport': DEFAULT_TRANSPORT,
     'ssl_key_file': DEFAULT_SSL_KEY_FILE,
     'ssl_cert_file': DEFAULT_SSL_CERT_FILE,
@@ -58,10 +65,11 @@ def parse_uri(uri):
     :rtype: first value: :obj:`dict` or ``None``,
         second value: ``None`` or :obj:`str`
     """
+    # pylint: disable=too-many-branches
 
     # TODO: Support Unix sockets.
     def parse_error(uri, msg):
-        msg = 'URI "%s": %s' % (uri, msg)
+        msg = f'URI "{uri}": {msg}'
         return None, msg
 
     if not uri:
@@ -88,17 +96,18 @@ def parse_error(uri, msg):
     except ValueError:
         return parse_error(uri, 'port should be a number')
 
-    for k, v in default_addr_opts.items():
-        result[k] = v
+    for key, val in default_addr_opts.items():
+        if key not in result:
+            result[key] = val
 
     if opts_str != "":
         for opt_str in opts_str.split('&'):
             opt = opt_str.split('=')
             if len(opt) != 2:
                 continue
-            for k in default_addr_opts:
-                if k == opt[0]:
-                    result[k] = opt[1]
+            for key in default_addr_opts:
+                if key == opt[0]:
+                    result[key] = opt[1]
 
     return result, None
 
@@ -117,23 +126,32 @@ def prepare_address(address):
     :rtype: first value: :obj:`dict` or ``None``,
         second value: ``None`` or :obj:`str`
     """
+    # pylint: disable=too-many-return-statements,too-many-branches
 
     def format_error(address, err):
-        return None, 'Address %s: %s' % (str(address), err)
+        return None, f'Address {str(address)}: {err}'
 
     if not isinstance(address, dict):
         return format_error(address, 'address must be a dict')
 
-    if 'port' not in address or address['port'] is None:
-        return format_error(address, 'port is not set or None')
-
     result = {}
-    for k, v in address.items():
-        result[k] = v
+    for key, val in address.items():
+        result[key] = val
     # Set default values.
-    for k, v in default_addr_opts.items():
-        if k not in result:
-            result[k] = v
+    for key, val in default_addr_opts.items():
+        if key not in result:
+            result[key] = val
+
+    if result['socket_fd'] is not None:
+        # Looks like socket fd.
+        if result['host'] is not None or result['port'] is not None:
+            return format_error(result,
+                                "specifying both socket_fd and host/port is not allowed")
+
+        if not isinstance(result['socket_fd'], int):
+            return format_error(result,
+                                'socket_fd must be an int')
+        return result, None
 
     if isinstance(result['port'], int):
         # Looks like an inet address.
@@ -152,11 +170,12 @@ def format_error(address, err):
                                 'port must be an int for an inet result')
         if result['port'] < 1 or result['port'] > 65535:
             return format_error(result, 'port must be in range [1, 65535] '
-                                         'for an inet result')
+                                        'for an inet result')
 
         # Looks okay.
         return result, None
-    elif isinstance(result['port'], str):
+
+    if isinstance(result['port'], str):
         # Looks like a unix address.
 
         # Expect no host.
@@ -188,6 +207,7 @@ def update_connection(conn, address):
 
     conn.host = address["host"]
     conn.port = address["port"]
+    conn.socket_fd = address["socket_fd"]
     conn.transport = address['transport']
     conn.ssl_key_file = address['ssl_key_file']
     conn.ssl_cert_file = address['ssl_cert_file']
@@ -198,7 +218,7 @@ def update_connection(conn, address):
     conn.auth_type = address['auth_type']
 
 
-class RoundRobinStrategy(object):
+class RoundRobinStrategy():
     """
     Defines strategy to choose next pool server after fail.
     """
@@ -209,6 +229,8 @@ def __init__(self, addrs):
             :paramref:`~tarantool.ConnectionPool.params.addrs`.
         :type addrs: :obj:`list` of :obj:`dict`
         """
+        self.pos = None
+        self.addrs = []
         self.update(addrs)
 
     def update(self, new_addrs):
@@ -230,7 +252,7 @@ def update(self, new_addrs):
         new_addrs = new_addrs_unique
 
         # Save a current address if any.
-        if 'pos' in self.__dict__ and 'addrs' in self.__dict__:
+        if self.pos is not None:
             current_addr = self.addrs[self.pos]
         else:
             current_addr = None
@@ -262,7 +284,10 @@ class MeshConnection(Connection):
     Represents a connection to a cluster of Tarantool servers.
     """
 
-    def __init__(self, host=None, port=None,
+    def __init__(self,
+                 host=DEFAULT_HOST,
+                 port=DEFAULT_PORT,
+                 socket_fd=DEFAULT_SOCKET_FD,
                  user=None,
                  password=None,
                  socket_timeout=SOCKET_TIMEOUT,
@@ -283,7 +308,8 @@ def __init__(self, host=None, port=None,
                  addrs=None,
                  strategy_class=RoundRobinStrategy,
                  cluster_discovery_function=None,
-                 cluster_discovery_delay=CLUSTER_DISCOVERY_DELAY):
+                 cluster_discovery_delay=CLUSTER_DISCOVERY_DELAY,
+                 fetch_schema=True):
         """
         :param host: Refer to
             :paramref:`~tarantool.Connection.params.host`.
@@ -291,7 +317,12 @@ def __init__(self, host=None, port=None,
             :paramref:`~tarantool.MeshConnection.params.addrs` list.
 
         :param port: Refer to
-            :paramref:`~tarantool.Connection.params.host`.
+            :paramref:`~tarantool.Connection.params.port`.
+            Value would be used to add one more server in
+            :paramref:`~tarantool.MeshConnection.params.addrs` list.
+
+        :param socket_fd: Refer to
+            :paramref:`~tarantol.Connection.params.socket_fd`.
             Value would be used to add one more server in
             :paramref:`~tarantool.MeshConnection.params.addrs` list.
 
@@ -425,10 +456,14 @@ def __init__(self, host=None, port=None,
             list refresh.
         :type cluster_discovery_delay: :obj:`float`, optional
 
+        :param fetch_schema: Refer to
+            :paramref:`~tarantool.Connection.params.fetch_schema`.
+
         :raises: :exc:`~tarantool.error.ConfigurationError`,
             :class:`~tarantool.Connection` exceptions,
             :class:`~tarantool.MeshConnection.connect` exceptions
         """
+        # pylint: disable=too-many-arguments,too-many-locals,too-many-positional-arguments
 
         if addrs is None:
             addrs = []
@@ -436,9 +471,10 @@ def __init__(self, host=None, port=None,
             # Don't change user provided arguments.
             addrs = addrs[:]
 
-        if host and port:
+        if (host and port) or socket_fd:
             addrs.insert(0, {'host': host,
                              'port': port,
+                             'socket_fd': socket_fd,
                              'transport': transport,
                              'ssl_key_file': ssl_key_file,
                              'ssl_cert_file': ssl_cert_file,
@@ -470,9 +506,10 @@ def __init__(self, host=None, port=None,
         self.cluster_discovery_delay = cluster_discovery_delay
         self.last_nodes_refresh = 0
 
-        super(MeshConnection, self).__init__(
+        super().__init__(
             host=addr['host'],
             port=addr['port'],
+            socket_fd=addr['socket_fd'],
             user=user,
             password=password,
             socket_timeout=socket_timeout,
@@ -489,7 +526,8 @@ def __init__(self, host=None, port=None,
             ssl_ciphers=addr['ssl_ciphers'],
             ssl_password=addr['ssl_password'],
             ssl_password_file=addr['ssl_password_file'],
-            auth_type=addr['auth_type'])
+            auth_type=addr['auth_type'],
+            fetch_schema=fetch_schema)
 
     def connect(self):
         """
@@ -503,7 +541,7 @@ def connect(self):
             :exc:`~tarantool.error.NetworkError`,
             :class:`~tarantool.Connection.connect` exceptions
         """
-        super(MeshConnection, self).connect()
+        super().connect()
         if self.connected and self.cluster_discovery_function:
             self._opt_refresh_instances()
 
@@ -519,11 +557,11 @@ def _opt_reconnect(self):
         last_error = None
         for _ in range(len(self.strategy.addrs)):
             try:
-                super(MeshConnection, self)._opt_reconnect()
+                super()._opt_reconnect()
                 last_error = None
                 break
-            except NetworkError as e:
-                last_error = e
+            except NetworkError as exc:
+                last_error = exc
                 addr = self.strategy.getnext()
                 update_connection(self, addr)
 
@@ -553,8 +591,8 @@ def _opt_refresh_instances(self):
                               self.call_16)
         try:
             resp = self._send_request_wo_reconnect(request)
-        except DatabaseError as e:
-            msg = 'got "%s" error, skipped address updates' % str(e)
+        except DatabaseError as exc:
+            msg = f'got "{str(exc)}" error, skipped address updates'
             warn(msg, ClusterDiscoveryWarning)
             return
 
@@ -592,6 +630,7 @@ def _opt_refresh_instances(self):
         # an instance list and connect to one of new instances.
         current_addr = {'host': self.host,
                         'port': self.port,
+                        'socket_fd': self.socket_fd,
                         'transport': self.transport,
                         'ssl_key_file': self.ssl_key_file,
                         'ssl_cert_file': self.ssl_cert_file,
@@ -621,4 +660,4 @@ def _send_request(self, request, on_push=None, on_push_ctx=None):
         """
 
         self._opt_refresh_instances()
-        return super(MeshConnection, self)._send_request(request, on_push, on_push_ctx)
+        return super()._send_request(request, on_push, on_push_ctx)
diff --git a/tarantool/msgpack_ext/datetime.py b/tarantool/msgpack_ext/datetime.py
index 64422f5d..f7323c5f 100644
--- a/tarantool/msgpack_ext/datetime.py
+++ b/tarantool/msgpack_ext/datetime.py
@@ -40,7 +40,6 @@
 
 from tarantool.msgpack_ext.types.datetime import (
     NSEC_IN_SEC,
-    SEC_IN_MIN,
     Datetime,
 )
 import tarantool.msgpack_ext.types.timezones as tt_timezones
@@ -54,10 +53,10 @@
 
 BYTEORDER = 'little'
 
-SECONDS_SIZE_BYTES  = 8
-NSEC_SIZE_BYTES     = 4
+SECONDS_SIZE_BYTES = 8
+NSEC_SIZE_BYTES = 4
 TZOFFSET_SIZE_BYTES = 2
-TZINDEX_SIZE_BYTES  = 2
+TZINDEX_SIZE_BYTES = 2
 
 
 def get_int_as_bytes(data, size):
@@ -78,6 +77,7 @@ def get_int_as_bytes(data, size):
 
     return data.to_bytes(size, byteorder=BYTEORDER, signed=True)
 
+
 def encode(obj, _):
     """
     Encode a datetime object.
@@ -95,9 +95,9 @@ def encode(obj, _):
     nsec = obj.nsec
     tzoffset = obj.tzoffset
 
-    tz = obj.tz
-    if tz != '':
-        tzindex = tt_timezones.timezoneToIndex[tz]
+    timezone = obj.tz
+    if timezone != '':
+        tzindex = tt_timezones.timezoneToIndex[timezone]
     else:
         tzindex = 0
 
@@ -134,6 +134,7 @@ def get_bytes_as_int(data, cursor, size):
     part = data[cursor:cursor + size]
     return int.from_bytes(part, BYTEORDER, signed=True), cursor + size
 
+
 def decode(data, _):
     """
     Decode a datetime object.
@@ -152,11 +153,11 @@ def decode(data, _):
     seconds, cursor = get_bytes_as_int(data, cursor, SECONDS_SIZE_BYTES)
 
     data_len = len(data)
-    if data_len == (SECONDS_SIZE_BYTES + NSEC_SIZE_BYTES + \
-                    TZOFFSET_SIZE_BYTES + TZINDEX_SIZE_BYTES):
-        nsec, cursor     = get_bytes_as_int(data, cursor, NSEC_SIZE_BYTES)
+    if data_len == (SECONDS_SIZE_BYTES + NSEC_SIZE_BYTES
+                    + TZOFFSET_SIZE_BYTES + TZINDEX_SIZE_BYTES):
+        nsec, cursor = get_bytes_as_int(data, cursor, NSEC_SIZE_BYTES)
         tzoffset, cursor = get_bytes_as_int(data, cursor, TZOFFSET_SIZE_BYTES)
-        tzindex, cursor  = get_bytes_as_int(data, cursor, TZINDEX_SIZE_BYTES)
+        tzindex, cursor = get_bytes_as_int(data, cursor, TZINDEX_SIZE_BYTES)
     elif data_len == SECONDS_SIZE_BYTES:
         nsec = 0
         tzoffset = 0
@@ -170,9 +171,9 @@ def decode(data, _):
         tz = tt_timezones.indexToTimezone[tzindex]
         return Datetime(timestamp=seconds, nsec=nsec, tz=tz,
                         timestamp_since_utc_epoch=True)
-    elif tzoffset != 0:
+    if tzoffset != 0:
         return Datetime(timestamp=seconds, nsec=nsec, tzoffset=tzoffset,
                         timestamp_since_utc_epoch=True)
-    else:
-        return Datetime(timestamp=seconds, nsec=nsec,
-                        timestamp_since_utc_epoch=True)
+
+    return Datetime(timestamp=seconds, nsec=nsec,
+                    timestamp_since_utc_epoch=True)
diff --git a/tarantool/msgpack_ext/decimal.py b/tarantool/msgpack_ext/decimal.py
index bad947fb..f1654784 100644
--- a/tarantool/msgpack_ext/decimal.py
+++ b/tarantool/msgpack_ext/decimal.py
@@ -56,6 +56,8 @@
 
 from decimal import Decimal
 
+import msgpack
+
 from tarantool.error import MsgpackError, MsgpackWarning, warn
 
 EXT_ID = 1
@@ -65,6 +67,7 @@
 
 TARANTOOL_DECIMAL_MAX_DIGITS = 38
 
+
 def get_mp_sign(sign):
     """
     Parse decimal sign to a nibble.
@@ -88,6 +91,7 @@ def get_mp_sign(sign):
 
     raise RuntimeError
 
+
 def add_mp_digit(digit, bytes_reverted, digit_count):
     """
     Append decimal digit to a binary data array.
@@ -109,6 +113,7 @@ def add_mp_digit(digit, bytes_reverted, digit_count):
     else:
         bytes_reverted.append(digit)
 
+
 def check_valid_tarantool_decimal(str_repr, scale, first_digit_ind):
     """
     Decimal numbers have 38 digits of precision, that is, the total
@@ -183,21 +188,21 @@ def check_valid_tarantool_decimal(str_repr, scale, first_digit_ind):
         return True
 
     if (digit_count - scale) > TARANTOOL_DECIMAL_MAX_DIGITS:
-        raise MsgpackError('Decimal cannot be encoded: Tarantool decimal ' + \
+        raise MsgpackError('Decimal cannot be encoded: Tarantool decimal '
                            'supports a maximum of 38 digits.')
 
     starts_with_zero = str_repr[first_digit_ind] == '0'
 
-    if (    (digit_count > TARANTOOL_DECIMAL_MAX_DIGITS + 1) or \
-            (digit_count == TARANTOOL_DECIMAL_MAX_DIGITS + 1 \
-            and not starts_with_zero)):
-        warn('Decimal encoded with loss of precision: ' + \
+    if (digit_count > TARANTOOL_DECIMAL_MAX_DIGITS + 1) or \
+            (digit_count == TARANTOOL_DECIMAL_MAX_DIGITS + 1 and not starts_with_zero):
+        warn('Decimal encoded with loss of precision: '
              'Tarantool decimal supports a maximum of 38 digits.',
              MsgpackWarning)
         return False
 
     return True
 
+
 def strip_decimal_str(str_repr, scale, first_digit_ind):
     """
     Strip decimal digits after the decimal point if decimal cannot be
@@ -225,6 +230,7 @@ def strip_decimal_str(str_repr, scale, first_digit_ind):
     # Do not strips zeroes before the decimal point
     return str_repr
 
+
 def encode(obj, _):
     """
     Encode a decimal object.
@@ -244,8 +250,7 @@ def encode(obj, _):
     bytes_reverted = bytearray()
 
     scale = 0
-    for i in range(len(str_repr)):
-        str_digit = str_repr[i]
+    for i, str_digit in enumerate(str_repr):
         if str_digit == '.':
             scale = len(str_repr) - i - 1
             break
@@ -263,7 +268,7 @@ def encode(obj, _):
     bytes_reverted.append(get_mp_sign(sign))
 
     digit_count = 0
-    # We need to update the scale after possible strip_decimal_str() 
+    # We need to update the scale after possible strip_decimal_str()
     scale = 0
 
     for i in range(len(str_repr) - 1, first_digit_ind - 1, -1):
@@ -301,14 +306,15 @@ def get_str_sign(nibble):
     :meta private:
     """
 
-    if nibble == 0x0a or nibble == 0x0c or nibble == 0x0e or nibble == 0x0f:
+    if nibble in (0x0a, 0x0c, 0x0e, 0x0f):
         return '+'
 
-    if nibble == 0x0b or nibble == 0x0d:
+    if nibble in (0x0b, 0x0d):
         return '-'
 
     raise MsgpackError('Unexpected MP_DECIMAL sign nibble')
 
+
 def add_str_digit(digit, digits_reverted, scale):
     """
     Append decimal digit to a binary data array.
@@ -327,7 +333,7 @@ def add_str_digit(digit, digits_reverted, scale):
     :meta private:
     """
 
-    if not (0 <= digit <= 9):
+    if not 0 <= digit <= 9:
         raise MsgpackError('Unexpected MP_DECIMAL digit nibble')
 
     if len(digits_reverted) == scale:
@@ -335,6 +341,7 @@ def add_str_digit(digit, digits_reverted, scale):
 
     digits_reverted.append(str(digit))
 
+
 def decode(data, _):
     """
     Decode a decimal object.
@@ -348,7 +355,12 @@ def decode(data, _):
     :raise: :exc:`~tarantool.error.MsgpackError`
     """
 
-    scale = data[0] 
+    # A decimal starts with mp_int or mp_uint followed by raw bytes.
+    unpacker = msgpack.Unpacker()
+    unpacker.feed(data)
+
+    scale = unpacker.unpack()
+    scale_size = unpacker.tell()
 
     sign = get_str_sign(data[-1] & 0x0f)
 
@@ -357,7 +369,7 @@ def decode(data, _):
 
     add_str_digit(data[-1] >> 4, digits_reverted, scale)
 
-    for i in range(len(data) - 2, 0, -1):
+    for i in range(len(data) - 2, scale_size - 1, -1):
         add_str_digit(data[i] & 0x0f, digits_reverted, scale)
         add_str_digit(data[i] >> 4, digits_reverted, scale)
 
@@ -367,6 +379,12 @@ def decode(data, _):
 
     digits_reverted.append(sign)
 
-    str_repr = ''.join(digits_reverted[::-1])
+    digits = digits_reverted[::-1]
+
+    # Add trailing zeroes in case of a negative scale
+    for i in range(0, -1 * scale):
+        add_str_digit(0, digits, scale)
+
+    str_repr = ''.join(digits)
 
     return Decimal(str_repr)
diff --git a/tarantool/msgpack_ext/error.py b/tarantool/msgpack_ext/error.py
index a3f13a04..ef322d58 100644
--- a/tarantool/msgpack_ext/error.py
+++ b/tarantool/msgpack_ext/error.py
@@ -16,6 +16,7 @@
 `error`_ type id.
 """
 
+
 def encode(obj, packer):
     """
     Encode an error object.
@@ -33,6 +34,7 @@ def encode(obj, packer):
     err_map = encode_box_error(obj)
     return packer.pack(err_map)
 
+
 def decode(data, unpacker):
     """
     Decode an error object.
diff --git a/tarantool/msgpack_ext/interval.py b/tarantool/msgpack_ext/interval.py
index cd7ab16d..12136772 100644
--- a/tarantool/msgpack_ext/interval.py
+++ b/tarantool/msgpack_ext/interval.py
@@ -51,6 +51,7 @@
 `datetime.interval`_ type id.
 """
 
+
 def encode(obj, _):
     """
     Encode an interval object.
@@ -65,8 +66,7 @@ def encode(obj, _):
     buf = bytes()
 
     count = 0
-    for field_id in id_map.keys():
-        field_name = id_map[field_id]
+    for field_id, field_name in id_map.items():
         value = getattr(obj, field_name)
 
         if field_name == 'adjust':
@@ -80,6 +80,7 @@ def encode(obj, _):
 
     return buf
 
+
 def decode(data, unpacker):
     """
     Decode an interval object.
@@ -127,8 +128,8 @@ def decode(data, unpacker):
             if field_name == 'adjust':
                 try:
                     value = Adjust(value)
-                except ValueError as e:
-                    raise MsgpackError(e)
+                except ValueError as exc:
+                    raise MsgpackError(exc) from exc
 
             kwargs[id_map[field_id]] = value
 
diff --git a/tarantool/msgpack_ext/packer.py b/tarantool/msgpack_ext/packer.py
index 12faa29e..e2c03b8b 100644
--- a/tarantool/msgpack_ext/packer.py
+++ b/tarantool/msgpack_ext/packer.py
@@ -3,6 +3,7 @@
 
 .. _extension: https://www.tarantool.io/en/doc/latest/dev_guide/internals/msgpack_extensions/
 """
+# pylint: disable=duplicate-code
 
 from decimal import Decimal
 from uuid import UUID
@@ -19,13 +20,14 @@
 import tarantool.msgpack_ext.interval as ext_interval
 
 encoders = [
-    {'type': Decimal,  'ext': ext_decimal },
-    {'type': UUID,     'ext': ext_uuid    },
-    {'type': BoxError, 'ext': ext_error   },
+    {'type': Decimal, 'ext': ext_decimal},
+    {'type': UUID, 'ext': ext_uuid},
+    {'type': BoxError, 'ext': ext_error},
     {'type': Datetime, 'ext': ext_datetime},
     {'type': Interval, 'ext': ext_interval},
 ]
 
+
 def default(obj, packer=None):
     """
     :class:`msgpack.Packer` encoder.
@@ -48,4 +50,4 @@ def default(obj, packer=None):
     for encoder in encoders:
         if isinstance(obj, encoder['type']):
             return ExtType(encoder['ext'].EXT_ID, encoder['ext'].encode(obj, packer))
-    raise TypeError("Unknown type: %r" % (obj,))
+    raise TypeError(f"Unknown type: {repr(obj)}")
diff --git a/tarantool/msgpack_ext/types/datetime.py b/tarantool/msgpack_ext/types/datetime.py
index d2e4b903..d7068f57 100644
--- a/tarantool/msgpack_ext/types/datetime.py
+++ b/tarantool/msgpack_ext/types/datetime.py
@@ -1,10 +1,12 @@
 """
 Tarantool `datetime`_ extension type implementation module.
 """
+# pylint: disable=line-too-long
 
+from calendar import monthrange
 from copy import deepcopy
+from datetime import datetime, timedelta
 
-import pandas
 import pytz
 
 import tarantool.msgpack_ext.types.timezones as tt_timezones
@@ -15,15 +17,17 @@
 NSEC_IN_MKSEC = 1000
 SEC_IN_MIN = 60
 MONTH_IN_YEAR = 12
+_EPOCH = datetime(1970, 1, 1, tzinfo=pytz.utc)
 
-def compute_offset(timestamp):
+
+def compute_offset(_datetime):
     """
     Compute timezone offset. Offset is computed each time and not stored
     since it could depend on current datetime value. It is expected that
     timestamp offset is not ``None``.
 
-    :param timestamp: Timestamp data.
-    :type timestamp: :class:`pandas.Timestamp`
+    :param _datetime: Datetime date.
+    :type _datetime: :class:`datetime.datetime`
 
     :return: Timezone offset, in minutes.
     :rtype: :obj:`int`
@@ -31,7 +35,7 @@ def compute_offset(timestamp):
     :meta private:
     """
 
-    utc_offset = timestamp.tzinfo.utcoffset(timestamp)
+    utc_offset = _datetime.tzinfo.utcoffset(_datetime)
 
     # `None` offset is a valid utcoffset implementation,
     # but it seems that pytz timezones never return `None`:
@@ -41,6 +45,7 @@ def compute_offset(timestamp):
     # There is no precision loss since offset is in minutes
     return int(utc_offset.total_seconds()) // SEC_IN_MIN
 
+
 def get_python_tzinfo(tz):
     """
     All non-abbreviated Tarantool timezones are represented as pytz
@@ -71,10 +76,29 @@ def get_python_tzinfo(tz):
 
     return pytz.FixedOffset(tt_tzinfo['offset'])
 
+
+def month_last_day(year, month):
+    """
+    Get the number of the last day in month.
+
+    :param year: Calendar year.
+    :type year: :obj:`int`
+
+    :param month: Calendar month.
+    :type month: :obj:`int`
+
+    :rtype: :obj:`int`
+
+    :meta private:
+    """
+
+    return monthrange(year, month)[1]
+
+
 class Datetime():
     """
     Class representing Tarantool `datetime`_ info. Internals are based
-    on :class:`pandas.Timestamp`.
+    on :class:`datetime.datetime`.
 
     You can create :class:`~tarantool.Datetime` objects by using the
     same API as in Tarantool:
@@ -160,43 +184,39 @@ def __init__(self, *, timestamp=None, year=None, month=None,
         :type timestamp: :obj:`float` or :obj:`int`, optional
 
         :param year: Datetime year value. Must be a valid
-            :class:`pandas.Timestamp` ``year`` parameter.
+            :class:`datetime.datetime` ``year`` parameter.
             Must be provided unless the object is built with
             :paramref:`~tarantool.Datetime.params.data` or
             :paramref:`~tarantool.Datetime.params.timestamp`.
         :type year: :obj:`int`, optional
 
         :param month: Datetime month value. Must be a valid
-            :class:`pandas.Timestamp` ``month`` parameter.
+            :class:`datetime.datetime` ``month`` parameter.
             Must be provided unless the object is built with
             :paramref:`~tarantool.Datetime.params.data` or
             :paramref:`~tarantool.Datetime.params.timestamp`.
         :type month: :obj:`int`, optional
 
         :param day: Datetime day value. Must be a valid
-            :class:`pandas.Timestamp` ``day`` parameter.
+            :class:`datetime.datetime` ``day`` parameter.
             Must be provided unless the object is built with
             :paramref:`~tarantool.Datetime.params.data` or
             :paramref:`~tarantool.Datetime.params.timestamp`.
         :type day: :obj:`int`, optional
 
         :param hour: Datetime hour value. Must be a valid
-            :class:`pandas.Timestamp` ``hour`` parameter.
+            :class:`datetime.datetime` ``hour`` parameter.
         :type hour: :obj:`int`, optional
 
         :param minute: Datetime minute value. Must be a valid
-            :class:`pandas.Timestamp` ``minute`` parameter.
+            :class:`datetime.datetime` ``minute`` parameter.
         :type minute: :obj:`int`, optional
 
         :param sec: Datetime seconds value. Must be a valid
-            :class:`pandas.Timestamp` ``second`` parameter.
+            :class:`datetime.datetime` ``second`` parameter.
         :type sec: :obj:`int`, optional
 
-        :param nsec: Datetime nanoseconds value. Quotient of a division
-            by 1000 (nanoseconds in microseconds) must be a valid
-            :class:`pandas.Timestamp` ``microsecond`` parameter,
-            remainder of a division by 1000 must be a valid
-            :class:`pandas.Timestamp` ``nanosecond`` parameter.
+        :param nsec: Datetime nanoseconds value.
         :type sec: :obj:`int`, optional
 
         :param tzoffset: Timezone offset. Ignored, if provided together
@@ -207,7 +227,7 @@ def __init__(self, *, timestamp=None, year=None, month=None,
         :type tz: :obj:`str`, optional
 
         :param timestamp_since_utc_epoch: Parameter to set timestamp
-            convertion behavior for timezone-aware datetimes.
+            conversion behavior for timezone-aware datetimes.
 
             If ``False`` (default), behaves similar to Tarantool
             `datetime.new()`_:
@@ -228,13 +248,13 @@ def __init__(self, *, timestamp=None, year=None, month=None,
 
             Thus, if ``False``, datetime is computed from timestamp
             since epoch and then timezone is applied without any
-            convertion. In that case,
+            conversion. In that case,
             :attr:`~tarantool.Datetime.timestamp` won't be equal to
             initialization
             :paramref:`~tarantool.Datetime.params.timestamp` for all
             timezones with non-zero offset.
 
-            If ``True``, behaves similar to :class:`pandas.Timestamp`:
+            If ``True``, behaves similar to :class:`datetime.datetime`:
 
             .. code-block:: python
 
@@ -257,10 +277,11 @@ def __init__(self, *, timestamp=None, year=None, month=None,
         :type timestamp_since_utc_epoch: :obj:`bool`, optional
 
         :raise: :exc:`ValueError`, :exc:`~tarantool.error.MsgpackError`,
-            :class:`pandas.Timestamp` exceptions
+            :class:`datetime.datetime` exceptions
 
         .. _datetime.new(): https://www.tarantool.io/en/doc/latest/reference/reference_lua/datetime/new/
         """
+        # pylint: disable=too-many-branches,too-many-locals,too-many-statements,too-many-arguments
 
         tzinfo = None
         if tz != '':
@@ -275,46 +296,95 @@ def __init__(self, *, timestamp=None, year=None, month=None,
         # The logic is same as in Tarantool, refer to datetime API.
         # https://www.tarantool.io/en/doc/latest/reference/reference_lua/datetime/new/
         if timestamp is not None:
-            if ((year is not None) or (month is not None) or \
-                    (day is not None) or (hour is not None) or \
-                    (minute is not None) or (sec is not None)):
-                raise ValueError('Cannot provide both timestamp and year, month, ' +
+            # pylint: disable=too-many-boolean-expressions
+            if ((year is not None) or (month is not None)
+                    or (day is not None) or (hour is not None)
+                    or (minute is not None) or (sec is not None)):
+                raise ValueError('Cannot provide both timestamp and year, month, '
                                  'day, hour, minute, sec')
 
             if nsec is not None:
                 if not isinstance(timestamp, int):
                     raise ValueError('timestamp must be int if nsec provided')
 
-                total_nsec = timestamp * NSEC_IN_SEC + nsec
-                datetime = pandas.to_datetime(total_nsec, unit='ns')
-            else:
-                datetime = pandas.to_datetime(timestamp, unit='s')
+                # Tarantool may send negative nanoseconds or nanoseconds bigger
+                # than 999999999. datetime.datetime doesn't process overflows.
+                if (nsec >= NSEC_IN_SEC) or (nsec < 0):
+                    timestamp += nsec // NSEC_IN_SEC
+                    nsec = nsec % NSEC_IN_SEC
+
+            # datetime.fromtimestamp may raise OverflowError, if the timestamp
+            # is out of the range of values supported by the platform C localtime()
+            # function, and OSError on localtime() failure. It’s common for this
+            # to be restricted to years from 1970 through 2038, yet we want
+            # to support a wider range.
+            _datetime = _EPOCH + timedelta(seconds=timestamp)
 
-            if not timestamp_since_utc_epoch:
-                self._datetime = datetime.tz_localize(tzinfo)
-            else:
-                self._datetime = datetime.tz_localize(pytz.UTC).tz_convert(tzinfo)
-        else:
             if nsec is not None:
-                microsecond = nsec // NSEC_IN_MKSEC
-                nanosecond = nsec % NSEC_IN_MKSEC
+                _datetime = _datetime.replace(microsecond=nsec // NSEC_IN_MKSEC)
+                _datetime_nsec = nsec % NSEC_IN_MKSEC
             else:
-                microsecond = 0
-                nanosecond = 0
+                _datetime_nsec = 0
+
+            if tzinfo is not None:
+                if not timestamp_since_utc_epoch:
+                    # It seems that there is no way to get expected behavior without
+                    # this hack. Localizing a timezone-naive datetime built
+                    # from the timestamp fails since it uses local timezone to mess up
+                    # the underlying timestamp. On the other hand, you cannot localize
+                    # a timezone-aware datetime, even UTC one. Replaces don't work since
+                    # they are broken for pytz + datetime, see
+                    # https://pythonhosted.org/pytz/
+                    _datetime = datetime.combine(_datetime.date(), _datetime.time())
+                    _datetime = tzinfo.localize(_datetime)
+                else:
+                    _datetime = _datetime.astimezone(tzinfo)
+
+            self._datetime = _datetime
+            self._datetime_nsec = _datetime_nsec
+        else:
+            # datetime does not support None as defaults,
+            # we support them for backward compatibility.
+            if hour is None:
+                hour = 0
+
+            if minute is None:
+                minute = 0
 
-            self._datetime = pandas.Timestamp(
-                year=year, month=month, day=day,
-                hour=hour, minute=minute, second=sec,
-                microsecond=microsecond,
-                nanosecond=nanosecond).tz_localize(tzinfo)
+            if sec is None:
+                sec = 0
 
-    def _interval_operation(self, other, sign=1):
+            overflow = None
+            if nsec is None:
+                nsec = 0
+            else:
+                # Tarantool may send negative nanoseconds or nanoseconds bigger
+                # than 999999999. datetime.datetime doesn't process overflows.
+                if (nsec >= NSEC_IN_SEC) or (nsec < 0):
+                    overflow = timedelta(seconds=nsec // NSEC_IN_SEC)
+                    nsec = nsec % NSEC_IN_SEC
+
+            _datetime = datetime(year=year, month=month, day=day,
+                                 hour=hour, minute=minute, second=sec,
+                                 microsecond=nsec // NSEC_IN_MKSEC)
+            if overflow is not None:
+                _datetime = _datetime + overflow
+            # tzinfo as argument on the datetime not works as expected, see
+            # https://pythonhosted.org/pytz/
+            # Timezone-naive datetime objects are treated by many datetime methods
+            # as local times, so we represent time in UTC explicitly if not provided.
+            if tzinfo is None:
+                tzinfo = pytz.UTC
+            self._datetime = tzinfo.localize(_datetime)
+            self._datetime_nsec = nsec % NSEC_IN_MKSEC
+
+    def _interval_operation(self, interval, sign=1):
         """
         Implementation of :class:`~tarantool.Interval` addition and
         subtraction.
 
-        :param other: Interval to add or subtract.
-        :type other: :class:`~tarantool.Interval`
+        :param interval: Interval to add or subtract.
+        :type interval: :class:`~tarantool.Interval`
 
         :param sign: Right operand multiplier: ``1`` for addition,
             ``-1`` for subtractiom.
@@ -325,37 +395,45 @@ def _interval_operation(self, other, sign=1):
         :meta private:
         """
 
-        self_dt = self._datetime
+        old_dt = self._datetime
+        new_dt = old_dt
+
+        new_year = old_dt.year + sign * interval.year
+        new_month = old_dt.month + sign * interval.month
+        if (new_month < 1) or (new_month - 1 > MONTH_IN_YEAR):
+            new_year += (new_month - 1) // MONTH_IN_YEAR
+            new_month = (new_month - 1) % MONTH_IN_YEAR + 1
+
+        new_month_last_day = month_last_day(new_year, new_month)
+        old_month_last_day = month_last_day(old_dt.year, old_dt.month)
 
         # https://github.com/tarantool/tarantool/wiki/Datetime-Internals#date-adjustions-and-leap-years
-        months = other.year * MONTH_IN_YEAR + other.month
-
-        res = self_dt + pandas.DateOffset(months = sign * months)
-
-        # pandas.DateOffset works exactly like Adjust.NONE
-        if other.adjust == Adjust.EXCESS:
-            if self_dt.day > res.day:
-                res = res + pandas.DateOffset(days = self_dt.day - res.day)
-        elif other.adjust == Adjust.LAST:
-            if self_dt.is_month_end:
-                # day replaces days
-                res = res.replace(day = res.days_in_month)
-
-        res = res + pandas.Timedelta(weeks = sign * other.week,
-                                     days = sign * other.day,
-                                     hours = sign * other.hour,
-                                     minutes = sign * other.minute,
-                                     seconds = sign * other.sec,
-                                     microseconds = sign * (other.nsec // NSEC_IN_MKSEC),
-                                     nanoseconds = sign * (other.nsec % NSEC_IN_MKSEC))
-
-        if res.tzinfo is not None:
-            tzoffset = compute_offset(res)
+        if (interval.adjust == Adjust.NONE) and (new_month_last_day < new_dt.day):
+            new_dt = new_dt.replace(year=new_year, month=new_month, day=new_month_last_day)
+        elif (interval.adjust == Adjust.EXCESS) and (new_month_last_day < new_dt.day):
+            new_dt = new_dt.replace(year=new_year, month=new_month, day=new_month_last_day) + \
+                timedelta(days=new_dt.day - new_month_last_day)
+        elif (interval.adjust == Adjust.LAST) and (old_dt.day == old_month_last_day):
+            new_dt = new_dt.replace(year=new_year, month=new_month, day=new_month_last_day)
+        else:
+            new_dt = new_dt.replace(year=new_year, month=new_month)
+
+        nsec = self._datetime_nsec + sign * interval.nsec
+        new_dt = new_dt + timedelta(weeks=sign * interval.week,
+                                    days=sign * interval.day,
+                                    hours=sign * interval.hour,
+                                    minutes=sign * interval.minute,
+                                    seconds=sign * interval.sec,
+                                    microseconds=nsec // NSEC_IN_MKSEC)
+        new_nsec = nsec % NSEC_IN_MKSEC
+
+        if new_dt.tzinfo is not None:
+            tzoffset = compute_offset(new_dt)
         else:
             tzoffset = 0
-        return Datetime(year=res.year, month=res.month, day=res.day,
-                        hour=res.hour, minute=res.minute, sec=res.second,
-                        nsec=res.nanosecond + res.microsecond * NSEC_IN_MKSEC,
+        return Datetime(year=new_dt.year, month=new_dt.month, day=new_dt.day,
+                        hour=new_dt.hour, minute=new_dt.minute, sec=new_dt.second,
+                        nsec=new_nsec + new_dt.microsecond * NSEC_IN_MKSEC,
                         tzoffset=tzoffset, tz=self.tz)
 
     def __add__(self, other):
@@ -421,7 +499,8 @@ def __add__(self, other):
         """
 
         if not isinstance(other, Interval):
-            raise TypeError(f"unsupported operand type(s) for +: '{type(self)}' and '{type(other)}'")
+            raise TypeError("unsupported operand type(s) for +: "
+                            f"'{type(self)}' and '{type(other)}'")
 
         return self._interval_operation(other, sign=1)
 
@@ -451,61 +530,69 @@ def __sub__(self, other):
             self_dt = self._datetime
             other_dt = other._datetime
 
-            # Tarantool datetime subtraction ignores timezone info, but it is a bug:
-            #
-            # Tarantool 2.10.1-0-g482d91c66
-            #
-            # tarantool> datetime.new{tz='MSK'} - datetime.new{tz='UTC'}
-            # ---
-            # - +0 seconds
-            # ...
-            #
-            # Refer to https://github.com/tarantool/tarantool/issues/7698
-            # for possible updates.
-
             if self_dt.tzinfo != other_dt.tzinfo:
-                other_dt = other_dt.tz_convert(self_dt.tzinfo)
+                other_dt = other_dt.astimezone(self_dt.tzinfo)
 
-            self_nsec = self_dt.microsecond * NSEC_IN_MKSEC + self_dt.nanosecond
-            other_nsec = other_dt.microsecond * NSEC_IN_MKSEC + other_dt.nanosecond
+            self_nsec = self_dt.microsecond * NSEC_IN_MKSEC + self._datetime_nsec
+            other_nsec = other_dt.microsecond * NSEC_IN_MKSEC + other._datetime_nsec
 
             return Interval(
-                year = self_dt.year - other_dt.year,
-                month = self_dt.month - other_dt.month,
-                day = self_dt.day - other_dt.day,
-                hour = self_dt.hour - other_dt.hour,
-                minute = self_dt.minute - other_dt.minute,
-                sec = self_dt.second - other_dt.second,
-                nsec = self_nsec - other_nsec,
+                year=self_dt.year - other_dt.year,
+                month=self_dt.month - other_dt.month,
+                day=self_dt.day - other_dt.day,
+                hour=self_dt.hour - other_dt.hour,
+                minute=self_dt.minute - other_dt.minute,
+                sec=self_dt.second - other_dt.second,
+                nsec=self_nsec - other_nsec,
             )
-        elif isinstance(other, Interval):
+        if isinstance(other, Interval):
             return self._interval_operation(other, sign=-1)
-        else:
-            raise TypeError(f"unsupported operand type(s) for -: '{type(self)}' and '{type(other)}'")
+
+        raise TypeError(f"unsupported operand type(s) for -: '{type(self)}' and '{type(other)}'")
 
     def __eq__(self, other):
         """
         Datetimes are equal when underlying datetime infos are equal.
 
         :param other: Second operand.
-        :type other: :class:`~tarantool.Datetime` or
-            :class:`~pandas.Timestamp`
+        :type other: :class:`~tarantool.Datetime`
 
         :rtype: :obj:`bool`
         """
 
         if isinstance(other, Datetime):
-            return self._datetime == other._datetime
-        elif isinstance(other, pandas.Timestamp):
-            return self._datetime == other
-        else:
-            return False
+            return self.value == other.value
+        return False
 
     def __str__(self):
-        return self._datetime.__str__()
+        # Based on pandas.Timestamp isofomat for backward compatibility.
+        # https://github.com/pandas-dev/pandas/blob/249d93e4abc59639983eb3e8fccac8382592d457/pandas/_libs/tslibs/timestamps.pyx#L1015-L1034
+        base = self._datetime.isoformat(sep='T', timespec='auto')
+
+        # Preserve explicit UTC and implicit UTC difference for backward compatibility.
+        implicit_utc = False
+        if (self._datetime.tzinfo == pytz.UTC) and (self._tz == ''):
+            implicit_utc = True
+            base = base[:-6]
+
+        if self._datetime_nsec == 0:
+            return base
+
+        if implicit_utc:
+            base1, base2 = base, ""
+        else:
+            base1, base2 = base[:-6], base[-6:]
+
+        if self._datetime.microsecond:
+            base1 += f"{self._datetime_nsec:03d}"
+        else:
+            base1 += f".{self._datetime_nsec:09d}"
+
+        return base1 + base2
 
     def __repr__(self):
-        return f'datetime: {self._datetime.__repr__()}, tz: "{self.tz}"'
+        return f'datetime: {self._datetime.__repr__()}, nsec: {self._datetime_nsec}, ' + \
+               f'tz: "{self.tz}"'
 
     def __copy__(self):
         cls = self.__class__
@@ -517,8 +604,8 @@ def __deepcopy__(self, memo):
         cls = self.__class__
         result = cls.__new__(cls)
         memo[id(self)] = result
-        for k, v in self.__dict__.items():
-            setattr(result, k, deepcopy(v, memo))
+        for key, val in self.__dict__.items():
+            setattr(result, key, deepcopy(val, memo))
         return result
 
     @property
@@ -589,7 +676,7 @@ def nsec(self):
         :rtype: :obj:`int`
         """
 
-        return self._datetime.value % NSEC_IN_SEC
+        return self._datetime.microsecond * NSEC_IN_MKSEC + self._datetime_nsec
 
     @property
     def timestamp(self):
@@ -599,7 +686,7 @@ def timestamp(self):
         :rtype: :obj:`float`
         """
 
-        return self._datetime.timestamp()
+        return self._datetime.timestamp() + self._datetime_nsec / NSEC_IN_SEC
 
     @property
     def tzoffset(self):
@@ -631,4 +718,7 @@ def value(self):
         :rtype: :obj:`int`
         """
 
-        return self._datetime.value
+        # Python sources way to get ineteger time since epoch.
+        # https://github.com/python/cpython/blob/a6f95941a3d686707fb38e0f37758e666f25e180/Lib/datetime.py#L1879
+        seconds = (self._datetime - _EPOCH) // timedelta(0, 1)
+        return seconds * NSEC_IN_SEC + self.nsec
diff --git a/tarantool/msgpack_ext/types/interval.py b/tarantool/msgpack_ext/types/interval.py
index e90ff0a0..734a9088 100644
--- a/tarantool/msgpack_ext/types/interval.py
+++ b/tarantool/msgpack_ext/types/interval.py
@@ -16,6 +16,61 @@
     8: 'adjust',
 }
 
+# https://github.com/tarantool/tarantool/blob/ff57f990f359f6d7866c1947174d8ba0e97b1ea6/src/lua/datetime.lua#L112-L146
+SECS_PER_DAY = 86400
+
+MIN_DATE_YEAR = -5879610
+MIN_DATE_MONTH = 6
+MIN_DATE_DAY = 22
+MAX_DATE_YEAR = 5879611
+MAX_DATE_MONTH = 7
+MAX_DATE_DAY = 11
+
+AVERAGE_DAYS_YEAR = 365.25
+AVERAGE_WEEK_YEAR = AVERAGE_DAYS_YEAR / 7
+INT_MAX = 2147483647
+MAX_YEAR_RANGE = MAX_DATE_YEAR - MIN_DATE_YEAR
+MAX_MONTH_RANGE = MAX_YEAR_RANGE * 12
+MAX_WEEK_RANGE = MAX_YEAR_RANGE * AVERAGE_WEEK_YEAR
+MAX_DAY_RANGE = MAX_YEAR_RANGE * AVERAGE_DAYS_YEAR
+MAX_HOUR_RANGE = MAX_DAY_RANGE * 24
+MAX_MIN_RANGE = MAX_HOUR_RANGE * 60
+MAX_SEC_RANGE = MAX_DAY_RANGE * SECS_PER_DAY
+MAX_NSEC_RANGE = INT_MAX
+
+max_val = {
+    'year': MAX_YEAR_RANGE,
+    'month': MAX_MONTH_RANGE,
+    'week': MAX_WEEK_RANGE,
+    'day': MAX_DAY_RANGE,
+    'hour': MAX_HOUR_RANGE,
+    'minute': MAX_MIN_RANGE,
+    'sec': MAX_SEC_RANGE,
+    'nsec': MAX_NSEC_RANGE,
+}
+
+
+def verify_range(intv):
+    """
+    Check allowed values. Approach is the same as in tarantool/tarantool.
+
+    :param intv: Raw interval to verify.
+    :type intv: :class:`~tarantool.Interval`
+
+    :raise: :exc:`ValueError`
+
+    :meta private:
+    """
+
+    for field_name, range_max in max_val.items():
+        val = getattr(intv, field_name)
+        # Tarantool implementation has a bug
+        # https://github.com/tarantool/tarantool/issues/8878
+        if (val > range_max) or (val < -range_max):
+            raise ValueError(f"value {val} of {field_name} is out of "
+                             f"allowed range [{-range_max}, {range_max}]")
+
+
 # https://github.com/tarantool/c-dt/blob/cec6acebb54d9e73ea0b99c63898732abd7683a6/dt_arithmetic.h#L34
 class Adjust(Enum):
     """
@@ -38,6 +93,7 @@ class Adjust(Enum):
     Mode when day snaps to the end of month, if it happens.
     """
 
+
 class Interval():
     """
     Class representing Tarantool `datetime.interval`_ info.
@@ -47,8 +103,8 @@ class Interval():
 
     .. code-block:: python
 
-        di = tarantool.Interval(year=-1, month=2, day=3,
-                                hour=4, minute=-5, sec=6,
+        di = tarantool.Interval(year=-1, month=2, week=-3,
+                                day=4, hour=5, minute=-6, sec=7,
                                 nsec=308543321,
                                 adjust=tarantool.IntervalAdjust.NONE)
 
@@ -57,6 +113,7 @@ class Interval():
 
     .. _datetime.interval: https://www.tarantool.io/en/doc/latest/dev_guide/internals/msgpack_extensions/#the-interval-type
     """
+    # pylint: disable=too-many-instance-attributes
 
     def __init__(self, *, year=0, month=0, week=0,
                  day=0, hour=0, minute=0, sec=0,
@@ -89,8 +146,11 @@ def __init__(self, *, year=0, month=0, week=0,
         :param adjust: Interval adjustment rule. Refer to
             :meth:`~tarantool.Datetime.__add__`.
         :type adjust: :class:`~tarantool.IntervalAdjust`, optional
+
+        :raise: :exc:`ValueError`
         """
-        
+        # pylint: disable=too-many-arguments
+
         self.year = year
         self.month = month
         self.week = week
@@ -101,6 +161,8 @@ def __init__(self, *, year=0, month=0, week=0,
         self.nsec = nsec
         self.adjust = adjust
 
+        verify_range(self)
+
     def __add__(self, other):
         """
         Valid operations:
@@ -119,7 +181,8 @@ def __add__(self, other):
         """
 
         if not isinstance(other, Interval):
-            raise TypeError(f"unsupported operand type(s) for +: '{type(self)}' and '{type(other)}'")
+            raise TypeError("unsupported operand type(s) for +: "
+                            f"'{type(self)}' and '{type(other)}'")
 
         # Tarantool saves adjust of the first argument
         #
@@ -139,14 +202,15 @@ def __add__(self, other):
         # ...
 
         return Interval(
-            year = self.year + other.year,
-            month = self.month + other.month,
-            day = self.day + other.day,
-            hour = self.hour + other.hour,
-            minute = self.minute + other.minute,
-            sec = self.sec + other.sec,
-            nsec = self.nsec + other.nsec,
-            adjust = self.adjust,
+            year=self.year + other.year,
+            month=self.month + other.month,
+            week=self.week + other.week,
+            day=self.day + other.day,
+            hour=self.hour + other.hour,
+            minute=self.minute + other.minute,
+            sec=self.sec + other.sec,
+            nsec=self.nsec + other.nsec,
+            adjust=self.adjust,
         )
 
     def __sub__(self, other):
@@ -167,7 +231,8 @@ def __sub__(self, other):
         """
 
         if not isinstance(other, Interval):
-            raise TypeError(f"unsupported operand type(s) for -: '{type(self)}' and '{type(other)}'")
+            raise TypeError("unsupported operand type(s) for -: "
+                            f"'{type(self)}' and '{type(other)}'")
 
         # Tarantool saves adjust of the first argument
         #
@@ -187,14 +252,15 @@ def __sub__(self, other):
         # ...
 
         return Interval(
-            year = self.year - other.year,
-            month = self.month - other.month,
-            day = self.day - other.day,
-            hour = self.hour - other.hour,
-            minute = self.minute - other.minute,
-            sec = self.sec - other.sec,
-            nsec = self.nsec - other.nsec,
-            adjust = self.adjust,
+            year=self.year - other.year,
+            month=self.month - other.month,
+            week=self.week - other.week,
+            day=self.day - other.day,
+            hour=self.hour - other.hour,
+            minute=self.minute - other.minute,
+            sec=self.sec - other.sec,
+            nsec=self.nsec - other.nsec,
+            adjust=self.adjust,
         )
 
     def __eq__(self, other):
@@ -219,16 +285,15 @@ def __eq__(self, other):
         # - false
         # ...
 
-        for field_id in id_map.keys():
-            field_name = id_map[field_id]
+        for _, field_name in id_map.items():
             if getattr(self, field_name) != getattr(other, field_name):
                 return False
 
         return True
 
     def __repr__(self):
-        return f'tarantool.Interval(year={self.year}, month={self.month}, day={self.day}, ' + \
-               f'hour={self.hour}, minute={self.minute}, sec={self.sec}, ' + \
+        return f'tarantool.Interval(year={self.year}, month={self.month}, week={self.week}, ' + \
+               f'day={self.day}, hour={self.hour}, minute={self.minute}, sec={self.sec}, ' + \
                f'nsec={self.nsec}, adjust={self.adjust})'
 
     __str__ = __repr__
diff --git a/tarantool/msgpack_ext/types/timezones/__init__.py b/tarantool/msgpack_ext/types/timezones/__init__.py
index c0c4ce7e..47a9edf9 100644
--- a/tarantool/msgpack_ext/types/timezones/__init__.py
+++ b/tarantool/msgpack_ext/types/timezones/__init__.py
@@ -3,10 +3,10 @@
 """
 
 from tarantool.msgpack_ext.types.timezones.timezones import (
-	TZ_AMBIGUOUS,
-	indexToTimezone,
-	timezoneToIndex,
-	timezoneAbbrevInfo,
+    TZ_AMBIGUOUS,
+    indexToTimezone,
+    timezoneToIndex,
+    timezoneAbbrevInfo,
 )
 
 __all__ = ['TZ_AMBIGUOUS', 'indexToTimezone', 'timezoneToIndex',
diff --git a/tarantool/msgpack_ext/types/timezones/gen-timezones.sh b/tarantool/msgpack_ext/types/timezones/gen-timezones.sh
index 5de5a51a..bca568b0 100755
--- a/tarantool/msgpack_ext/types/timezones/gen-timezones.sh
+++ b/tarantool/msgpack_ext/types/timezones/gen-timezones.sh
@@ -26,23 +26,24 @@ cat <<EOF > ${DST_FILE}
 Tarantool timezone info. Automatically generated by
 \`\`gen-timezones.sh\`\`.
 """
+# pylint: disable=too-many-lines
 
-TZ_UTC       = 0x01
-TZ_RFC       = 0x02
-TZ_MILITARY  = 0x04
+TZ_UTC = 0x01
+TZ_RFC = 0x02
+TZ_MILITARY = 0x04
 TZ_AMBIGUOUS = 0x08
-TZ_NYI       = 0x10
-TZ_OLSON     = 0x20
-TZ_ALIAS     = 0x40
-TZ_DST       = 0x80
+TZ_NYI = 0x10
+TZ_OLSON = 0x20
+TZ_ALIAS = 0x40
+TZ_DST = 0x80
 
 indexToTimezone = {
 EOF
 
 grep ZONE_ABBREV ${SRC_FILE} | sed "s/ZONE_ABBREV( *//g" | sed "s/[),]//g" \
-	| awk '{printf("\t%s : %s,\n", $1, $3)}' >> ${DST_FILE}
+	| awk '{printf("    %s: %s,\n", $1, $3)}' >> ${DST_FILE}
 grep ZONE_UNIQUE ${SRC_FILE} | sed "s/ZONE_UNIQUE( *//g" | sed "s/[),]//g" \
-	| awk '{printf("\t%s : %s,\n", $1, $2)}' >> ${DST_FILE}
+	| awk '{printf("    %s: %s,\n", $1, $2)}' >> ${DST_FILE}
 
 cat <<EOF >> ${DST_FILE}
 }
@@ -51,11 +52,11 @@ timezoneToIndex = {
 EOF
 
 grep ZONE_ABBREV ${SRC_FILE} | sed "s/ZONE_ABBREV( *//g" | sed "s/[),]//g" \
-	| awk '{printf("\t%s : %s,\n", $3, $1)}' >> ${DST_FILE}
+	| awk '{printf("    %s: %s,\n", $3, $1)}' >> ${DST_FILE}
 grep ZONE_UNIQUE ${SRC_FILE} | sed "s/ZONE_UNIQUE( *//g" | sed "s/[),]//g" \
-	| awk '{printf("\t%s : %s,\n", $2, $1)}' >> ${DST_FILE}
+	| awk '{printf("    %s: %s,\n", $2, $1)}' >> ${DST_FILE}
 grep ZONE_ALIAS  ${SRC_FILE} | sed "s/ZONE_ALIAS( *//g"  | sed "s/[),]//g" \
-	| awk '{printf("\t%s : %s,\n", $2, $1)}' >> ${DST_FILE}
+	| awk '{printf("    %s: %s,\n", $2, $1)}' >> ${DST_FILE}
 
 cat <<EOF >> ${DST_FILE}
 }
@@ -63,10 +64,23 @@ cat <<EOF >> ${DST_FILE}
 timezoneAbbrevInfo = {
 EOF
 
-grep ZONE_ABBREV ${SRC_FILE} | sed "s/ZONE_ABBREV( *//g" | sed "s/[),]//g" \
-	| awk '{printf("\t%s : {\"offset\" : %d, \"category\" : %s},\n", $3, $2, $4)}' >> ${DST_FILE}
+grep ZONE_ABBREV ${SRC_FILE} | sed "s/ZONE_ABBREV( *//g" | sed "s/[),]//g"  \
+	| awk '{printf("    %s: {\"offset\": %d, \"category\": %s},\n", $3, $2, $4)}' | sed "s/|/ | /g" >> ${DST_FILE}
 echo "}" >> ${DST_FILE}
 
 rm timezones.h
 
-python validate_timezones.py
+python <<EOF
+import pytz
+from timezones import timezoneToIndex, timezoneAbbrevInfo
+
+if __name__ != '__main__':
+    raise RuntimeError('Import not expected')
+
+for timezone in timezoneToIndex.keys():
+    if timezone in pytz.all_timezones:
+        continue
+
+    if not timezone in timezoneAbbrevInfo:
+        raise KeyError(f'Unknown Tarantool timezone {timezone}')
+EOF
diff --git a/tarantool/msgpack_ext/types/timezones/timezones.py b/tarantool/msgpack_ext/types/timezones/timezones.py
index 0e3ff770..082ee356 100644
--- a/tarantool/msgpack_ext/types/timezones/timezones.py
+++ b/tarantool/msgpack_ext/types/timezones/timezones.py
@@ -2,1786 +2,1787 @@
 Tarantool timezone info. Automatically generated by
 ``gen-timezones.sh``.
 """
+# pylint: disable=too-many-lines
 
-TZ_UTC       = 0x01
-TZ_RFC       = 0x02
-TZ_MILITARY  = 0x04
+TZ_UTC = 0x01
+TZ_RFC = 0x02
+TZ_MILITARY = 0x04
 TZ_AMBIGUOUS = 0x08
-TZ_NYI       = 0x10
-TZ_OLSON     = 0x20
-TZ_ALIAS     = 0x40
-TZ_DST       = 0x80
+TZ_NYI = 0x10
+TZ_OLSON = 0x20
+TZ_ALIAS = 0x40
+TZ_DST = 0x80
 
 indexToTimezone = {
-	1 : "A",
-	2 : "B",
-	3 : "C",
-	4 : "D",
-	5 : "E",
-	6 : "F",
-	7 : "G",
-	8 : "H",
-	9 : "I",
-	10 : "K",
-	11 : "L",
-	12 : "M",
-	13 : "N",
-	14 : "O",
-	15 : "P",
-	16 : "Q",
-	17 : "R",
-	18 : "S",
-	19 : "T",
-	20 : "U",
-	21 : "V",
-	22 : "W",
-	23 : "X",
-	24 : "Y",
-	25 : "Z",
-	32 : "AT",
-	40 : "BT",
-	48 : "CT",
-	56 : "ET",
-	64 : "GT",
-	72 : "IT",
-	80 : "KT",
-	88 : "MT",
-	96 : "PT",
-	104 : "ST",
-	112 : "UT",
-	120 : "WT",
-	128 : "ACT",
-	129 : "ADT",
-	130 : "AET",
-	131 : "AFT",
-	132 : "AMT",
-	133 : "AoE",
-	134 : "ART",
-	135 : "AST",
-	136 : "AZT",
-	144 : "BDT",
-	145 : "BNT",
-	146 : "BOT",
-	147 : "BRT",
-	148 : "BST",
-	149 : "BTT",
-	152 : "CAT",
-	153 : "CCT",
-	154 : "CDT",
-	155 : "CET",
-	156 : "CIT",
-	157 : "CKT",
-	158 : "CLT",
-	159 : "COT",
-	160 : "CST",
-	161 : "CVT",
-	162 : "CXT",
-	168 : "EAT",
-	169 : "ECT",
-	170 : "EDT",
-	171 : "EET",
-	172 : "EGT",
-	173 : "EST",
-	176 : "FET",
-	177 : "FJT",
-	178 : "FKT",
-	179 : "FNT",
-	184 : "GET",
-	185 : "GFT",
-	186 : "GMT",
-	187 : "GST",
-	188 : "GYT",
-	192 : "HAA",
-	193 : "HAC",
-	194 : "HAE",
-	195 : "HAP",
-	196 : "HAR",
-	197 : "HAT",
-	198 : "HDT",
-	199 : "HKT",
-	200 : "HLV",
-	201 : "HNA",
-	202 : "HNC",
-	203 : "HNE",
-	204 : "HNP",
-	205 : "HNR",
-	206 : "HNT",
-	207 : "HST",
-	208 : "ICT",
-	209 : "IDT",
-	210 : "IOT",
-	211 : "IST",
-	216 : "JST",
-	224 : "KGT",
-	225 : "KIT",
-	226 : "KST",
-	232 : "MCK",
-	233 : "MDT",
-	234 : "MEZ",
-	235 : "MHT",
-	236 : "MMT",
-	237 : "MSD",
-	238 : "MSK",
-	239 : "MST",
-	240 : "MUT",
-	241 : "MVT",
-	242 : "MYT",
-	248 : "NCT",
-	249 : "NDT",
-	250 : "NFT",
-	251 : "NPT",
-	252 : "NRT",
-	253 : "NST",
-	254 : "NUT",
-	256 : "OEZ",
-	264 : "PDT",
-	265 : "PET",
-	266 : "PGT",
-	267 : "PHT",
-	268 : "PKT",
-	269 : "PST",
-	270 : "PWT",
-	271 : "PYT",
-	272 : "RET",
-	280 : "SBT",
-	281 : "SCT",
-	282 : "SGT",
-	283 : "SRT",
-	284 : "SST",
-	288 : "TFT",
-	289 : "TJT",
-	290 : "TKT",
-	291 : "TLT",
-	292 : "TMT",
-	293 : "TOT",
-	294 : "TRT",
-	295 : "TVT",
-	296 : "UTC",
-	297 : "UYT",
-	298 : "UZT",
-	304 : "VET",
-	305 : "VUT",
-	312 : "WAT",
-	313 : "WDT",
-	314 : "WET",
-	315 : "WEZ",
-	316 : "WFT",
-	317 : "WGT",
-	318 : "WIB",
-	319 : "WIT",
-	320 : "WST",
-	328 : "ACDT",
-	329 : "ACST",
-	330 : "ADST",
-	331 : "AEDT",
-	332 : "AEST",
-	333 : "AKDT",
-	334 : "AKST",
-	335 : "ALMT",
-	336 : "AMDT",
-	337 : "AMST",
-	338 : "ANAT",
-	339 : "AQTT",
-	340 : "AWDT",
-	341 : "AWST",
-	342 : "AZOT",
-	343 : "AZST",
-	344 : "BDST",
-	345 : "BRST",
-	352 : "CAST",
-	353 : "CDST",
-	354 : "CEDT",
-	355 : "CEST",
-	356 : "CHOT",
-	357 : "ChST",
-	358 : "CHUT",
-	359 : "CIST",
-	360 : "CLDT",
-	361 : "CLST",
-	368 : "DAVT",
-	369 : "DDUT",
-	376 : "EADT",
-	377 : "EAST",
-	378 : "ECST",
-	379 : "EDST",
-	380 : "EEDT",
-	381 : "EEST",
-	382 : "EGST",
-	384 : "FJDT",
-	385 : "FJST",
-	386 : "FKDT",
-	387 : "FKST",
-	392 : "GALT",
-	393 : "GAMT",
-	394 : "GILT",
-	400 : "HADT",
-	401 : "HAST",
-	402 : "HOVT",
-	408 : "IRDT",
-	409 : "IRKT",
-	410 : "IRST",
-	416 : "KOST",
-	417 : "KRAT",
-	418 : "KUYT",
-	424 : "LHDT",
-	425 : "LHST",
-	426 : "LINT",
-	432 : "MAGT",
-	433 : "MART",
-	434 : "MAWT",
-	435 : "MDST",
-	436 : "MESZ",
-	440 : "NFDT",
-	441 : "NOVT",
-	442 : "NZDT",
-	443 : "NZST",
-	448 : "OESZ",
-	449 : "OMST",
-	450 : "ORAT",
-	456 : "PDST",
-	457 : "PETT",
-	458 : "PHOT",
-	459 : "PMDT",
-	460 : "PMST",
-	461 : "PONT",
-	462 : "PYST",
-	464 : "QYZT",
-	472 : "ROTT",
-	480 : "SAKT",
-	481 : "SAMT",
-	482 : "SAST",
-	483 : "SRET",
-	484 : "SYOT",
-	488 : "TAHT",
-	489 : "TOST",
-	496 : "ULAT",
-	497 : "UYST",
-	504 : "VLAT",
-	505 : "VOST",
-	512 : "WAKT",
-	513 : "WAST",
-	514 : "WEDT",
-	515 : "WEST",
-	516 : "WESZ",
-	517 : "WGST",
-	518 : "WITA",
-	520 : "YAKT",
-	521 : "YAPT",
-	522 : "YEKT",
-	528 : "ACWST",
-	529 : "ANAST",
-	530 : "AZODT",
-	531 : "AZOST",
-	536 : "CHADT",
-	537 : "CHAST",
-	538 : "CHODT",
-	539 : "CHOST",
-	540 : "CIDST",
-	544 : "EASST",
-	545 : "EFATE",
-	552 : "HOVDT",
-	553 : "HOVST",
-	560 : "IRKST",
-	568 : "KRAST",
-	576 : "MAGST",
-	584 : "NACDT",
-	585 : "NACST",
-	586 : "NAEDT",
-	587 : "NAEST",
-	588 : "NAMDT",
-	589 : "NAMST",
-	590 : "NAPDT",
-	591 : "NAPST",
-	592 : "NOVST",
-	600 : "OMSST",
-	608 : "PETST",
-	616 : "SAMST",
-	624 : "ULAST",
-	632 : "VLAST",
-	640 : "WARST",
-	648 : "YAKST",
-	649 : "YEKST",
-	656 : "CHODST",
-	664 : "HOVDST",
-	672 : "Africa/Abidjan",
-	673 : "Africa/Algiers",
-	674 : "Africa/Bissau",
-	675 : "Africa/Cairo",
-	676 : "Africa/Casablanca",
-	677 : "Africa/Ceuta",
-	678 : "Africa/El_Aaiun",
-	679 : "Africa/Johannesburg",
-	680 : "Africa/Juba",
-	681 : "Africa/Khartoum",
-	682 : "Africa/Lagos",
-	683 : "Africa/Maputo",
-	684 : "Africa/Monrovia",
-	685 : "Africa/Nairobi",
-	686 : "Africa/Ndjamena",
-	687 : "Africa/Sao_Tome",
-	688 : "Africa/Tripoli",
-	689 : "Africa/Tunis",
-	690 : "Africa/Windhoek",
-	691 : "America/Adak",
-	692 : "America/Anchorage",
-	693 : "America/Araguaina",
-	694 : "America/Argentina/Buenos_Aires",
-	695 : "America/Argentina/Catamarca",
-	696 : "America/Argentina/Cordoba",
-	697 : "America/Argentina/Jujuy",
-	698 : "America/Argentina/La_Rioja",
-	699 : "America/Argentina/Mendoza",
-	700 : "America/Argentina/Rio_Gallegos",
-	701 : "America/Argentina/Salta",
-	702 : "America/Argentina/San_Juan",
-	703 : "America/Argentina/San_Luis",
-	704 : "America/Argentina/Tucuman",
-	705 : "America/Argentina/Ushuaia",
-	706 : "America/Asuncion",
-	707 : "America/Bahia",
-	708 : "America/Bahia_Banderas",
-	709 : "America/Barbados",
-	710 : "America/Belem",
-	711 : "America/Belize",
-	712 : "America/Boa_Vista",
-	713 : "America/Bogota",
-	714 : "America/Boise",
-	715 : "America/Cambridge_Bay",
-	716 : "America/Campo_Grande",
-	717 : "America/Cancun",
-	718 : "America/Caracas",
-	719 : "America/Cayenne",
-	720 : "America/Chicago",
-	721 : "America/Chihuahua",
-	722 : "America/Costa_Rica",
-	723 : "America/Cuiaba",
-	724 : "America/Danmarkshavn",
-	725 : "America/Dawson",
-	726 : "America/Dawson_Creek",
-	727 : "America/Denver",
-	728 : "America/Detroit",
-	729 : "America/Edmonton",
-	730 : "America/Eirunepe",
-	731 : "America/El_Salvador",
-	732 : "America/Fort_Nelson",
-	733 : "America/Fortaleza",
-	734 : "America/Glace_Bay",
-	735 : "America/Goose_Bay",
-	736 : "America/Grand_Turk",
-	737 : "America/Guatemala",
-	738 : "America/Guayaquil",
-	739 : "America/Guyana",
-	740 : "America/Halifax",
-	741 : "America/Havana",
-	742 : "America/Hermosillo",
-	743 : "America/Indiana/Indianapolis",
-	744 : "America/Indiana/Knox",
-	745 : "America/Indiana/Marengo",
-	746 : "America/Indiana/Petersburg",
-	747 : "America/Indiana/Tell_City",
-	748 : "America/Indiana/Vevay",
-	749 : "America/Indiana/Vincennes",
-	750 : "America/Indiana/Winamac",
-	751 : "America/Inuvik",
-	752 : "America/Iqaluit",
-	753 : "America/Jamaica",
-	754 : "America/Juneau",
-	755 : "America/Kentucky/Louisville",
-	756 : "America/Kentucky/Monticello",
-	757 : "America/La_Paz",
-	758 : "America/Lima",
-	759 : "America/Los_Angeles",
-	760 : "America/Maceio",
-	761 : "America/Managua",
-	762 : "America/Manaus",
-	763 : "America/Martinique",
-	764 : "America/Matamoros",
-	765 : "America/Mazatlan",
-	766 : "America/Menominee",
-	767 : "America/Merida",
-	768 : "America/Metlakatla",
-	769 : "America/Mexico_City",
-	770 : "America/Miquelon",
-	771 : "America/Moncton",
-	772 : "America/Monterrey",
-	773 : "America/Montevideo",
-	774 : "America/New_York",
-	775 : "America/Nipigon",
-	776 : "America/Nome",
-	777 : "America/Noronha",
-	778 : "America/North_Dakota/Beulah",
-	779 : "America/North_Dakota/Center",
-	780 : "America/North_Dakota/New_Salem",
-	781 : "America/Nuuk",
-	782 : "America/Ojinaga",
-	783 : "America/Panama",
-	784 : "America/Pangnirtung",
-	785 : "America/Paramaribo",
-	786 : "America/Phoenix",
-	787 : "America/Port-au-Prince",
-	788 : "America/Porto_Velho",
-	789 : "America/Puerto_Rico",
-	790 : "America/Punta_Arenas",
-	791 : "America/Rainy_River",
-	792 : "America/Rankin_Inlet",
-	793 : "America/Recife",
-	794 : "America/Regina",
-	795 : "America/Resolute",
-	796 : "America/Rio_Branco",
-	797 : "America/Santarem",
-	798 : "America/Santiago",
-	799 : "America/Santo_Domingo",
-	800 : "America/Sao_Paulo",
-	801 : "America/Scoresbysund",
-	802 : "America/Sitka",
-	803 : "America/St_Johns",
-	804 : "America/Swift_Current",
-	805 : "America/Tegucigalpa",
-	806 : "America/Thule",
-	807 : "America/Thunder_Bay",
-	808 : "America/Tijuana",
-	809 : "America/Toronto",
-	810 : "America/Vancouver",
-	811 : "America/Whitehorse",
-	812 : "America/Winnipeg",
-	813 : "America/Yakutat",
-	814 : "America/Yellowknife",
-	815 : "Antarctica/Casey",
-	816 : "Antarctica/Davis",
-	817 : "Antarctica/Macquarie",
-	818 : "Antarctica/Mawson",
-	819 : "Antarctica/Palmer",
-	820 : "Antarctica/Rothera",
-	821 : "Antarctica/Troll",
-	822 : "Antarctica/Vostok",
-	823 : "Asia/Almaty",
-	824 : "Asia/Amman",
-	825 : "Asia/Anadyr",
-	826 : "Asia/Aqtau",
-	827 : "Asia/Aqtobe",
-	828 : "Asia/Ashgabat",
-	829 : "Asia/Atyrau",
-	830 : "Asia/Baghdad",
-	831 : "Asia/Baku",
-	832 : "Asia/Bangkok",
-	833 : "Asia/Barnaul",
-	834 : "Asia/Beirut",
-	835 : "Asia/Bishkek",
-	836 : "Asia/Brunei",
-	837 : "Asia/Chita",
-	838 : "Asia/Choibalsan",
-	839 : "Asia/Colombo",
-	840 : "Asia/Damascus",
-	841 : "Asia/Dhaka",
-	842 : "Asia/Dili",
-	843 : "Asia/Dubai",
-	844 : "Asia/Dushanbe",
-	845 : "Asia/Famagusta",
-	846 : "Asia/Gaza",
-	847 : "Asia/Hebron",
-	848 : "Asia/Ho_Chi_Minh",
-	849 : "Asia/Hong_Kong",
-	850 : "Asia/Hovd",
-	851 : "Asia/Irkutsk",
-	852 : "Asia/Jakarta",
-	853 : "Asia/Jayapura",
-	854 : "Asia/Jerusalem",
-	855 : "Asia/Kabul",
-	856 : "Asia/Kamchatka",
-	857 : "Asia/Karachi",
-	858 : "Asia/Kathmandu",
-	859 : "Asia/Khandyga",
-	860 : "Asia/Kolkata",
-	861 : "Asia/Krasnoyarsk",
-	862 : "Asia/Kuala_Lumpur",
-	863 : "Asia/Kuching",
-	864 : "Asia/Macau",
-	865 : "Asia/Magadan",
-	866 : "Asia/Makassar",
-	867 : "Asia/Manila",
-	868 : "Asia/Nicosia",
-	869 : "Asia/Novokuznetsk",
-	870 : "Asia/Novosibirsk",
-	871 : "Asia/Omsk",
-	872 : "Asia/Oral",
-	873 : "Asia/Pontianak",
-	874 : "Asia/Pyongyang",
-	875 : "Asia/Qatar",
-	876 : "Asia/Qostanay",
-	877 : "Asia/Qyzylorda",
-	878 : "Asia/Riyadh",
-	879 : "Asia/Sakhalin",
-	880 : "Asia/Samarkand",
-	881 : "Asia/Seoul",
-	882 : "Asia/Shanghai",
-	883 : "Asia/Singapore",
-	884 : "Asia/Srednekolymsk",
-	885 : "Asia/Taipei",
-	886 : "Asia/Tashkent",
-	887 : "Asia/Tbilisi",
-	888 : "Asia/Tehran",
-	889 : "Asia/Thimphu",
-	890 : "Asia/Tokyo",
-	891 : "Asia/Tomsk",
-	892 : "Asia/Ulaanbaatar",
-	893 : "Asia/Urumqi",
-	894 : "Asia/Ust-Nera",
-	895 : "Asia/Vladivostok",
-	896 : "Asia/Yakutsk",
-	897 : "Asia/Yangon",
-	898 : "Asia/Yekaterinburg",
-	899 : "Asia/Yerevan",
-	900 : "Atlantic/Azores",
-	901 : "Atlantic/Bermuda",
-	902 : "Atlantic/Canary",
-	903 : "Atlantic/Cape_Verde",
-	904 : "Atlantic/Faroe",
-	905 : "Atlantic/Madeira",
-	906 : "Atlantic/Reykjavik",
-	907 : "Atlantic/South_Georgia",
-	908 : "Atlantic/Stanley",
-	909 : "Australia/Adelaide",
-	910 : "Australia/Brisbane",
-	911 : "Australia/Broken_Hill",
-	912 : "Australia/Darwin",
-	913 : "Australia/Eucla",
-	914 : "Australia/Hobart",
-	915 : "Australia/Lindeman",
-	916 : "Australia/Lord_Howe",
-	917 : "Australia/Melbourne",
-	918 : "Australia/Perth",
-	919 : "Australia/Sydney",
-	920 : "Etc/GMT",
-	921 : "Etc/UTC",
-	922 : "Europe/Amsterdam",
-	923 : "Europe/Andorra",
-	924 : "Europe/Astrakhan",
-	925 : "Europe/Athens",
-	926 : "Europe/Belgrade",
-	927 : "Europe/Berlin",
-	928 : "Europe/Brussels",
-	929 : "Europe/Bucharest",
-	930 : "Europe/Budapest",
-	931 : "Europe/Chisinau",
-	932 : "Europe/Copenhagen",
-	933 : "Europe/Dublin",
-	934 : "Europe/Gibraltar",
-	935 : "Europe/Helsinki",
-	936 : "Europe/Istanbul",
-	937 : "Europe/Kaliningrad",
-	938 : "Europe/Kiev",
-	939 : "Europe/Kirov",
-	940 : "Europe/Lisbon",
-	941 : "Europe/London",
-	942 : "Europe/Luxembourg",
-	943 : "Europe/Madrid",
-	944 : "Europe/Malta",
-	945 : "Europe/Minsk",
-	946 : "Europe/Monaco",
-	947 : "Europe/Moscow",
-	948 : "Europe/Oslo",
-	949 : "Europe/Paris",
-	950 : "Europe/Prague",
-	951 : "Europe/Riga",
-	952 : "Europe/Rome",
-	953 : "Europe/Samara",
-	954 : "Europe/Saratov",
-	955 : "Europe/Simferopol",
-	956 : "Europe/Sofia",
-	957 : "Europe/Stockholm",
-	958 : "Europe/Tallinn",
-	959 : "Europe/Tirane",
-	960 : "Europe/Ulyanovsk",
-	961 : "Europe/Uzhgorod",
-	962 : "Europe/Vienna",
-	963 : "Europe/Vilnius",
-	964 : "Europe/Volgograd",
-	965 : "Europe/Warsaw",
-	966 : "Europe/Zaporozhye",
-	967 : "Europe/Zurich",
-	968 : "Indian/Chagos",
-	969 : "Indian/Christmas",
-	970 : "Indian/Cocos",
-	971 : "Indian/Kerguelen",
-	972 : "Indian/Mahe",
-	973 : "Indian/Maldives",
-	974 : "Indian/Mauritius",
-	975 : "Indian/Reunion",
-	976 : "Pacific/Apia",
-	977 : "Pacific/Auckland",
-	978 : "Pacific/Bougainville",
-	979 : "Pacific/Chatham",
-	980 : "Pacific/Chuuk",
-	981 : "Pacific/Easter",
-	982 : "Pacific/Efate",
-	983 : "Pacific/Fakaofo",
-	984 : "Pacific/Fiji",
-	985 : "Pacific/Funafuti",
-	986 : "Pacific/Galapagos",
-	987 : "Pacific/Gambier",
-	988 : "Pacific/Guadalcanal",
-	989 : "Pacific/Guam",
-	990 : "Pacific/Honolulu",
-	991 : "Pacific/Kanton",
-	992 : "Pacific/Kiritimati",
-	993 : "Pacific/Kosrae",
-	994 : "Pacific/Kwajalein",
-	995 : "Pacific/Majuro",
-	996 : "Pacific/Marquesas",
-	997 : "Pacific/Nauru",
-	998 : "Pacific/Niue",
-	999 : "Pacific/Norfolk",
-	1000 : "Pacific/Noumea",
-	1001 : "Pacific/Pago_Pago",
-	1002 : "Pacific/Palau",
-	1003 : "Pacific/Pitcairn",
-	1004 : "Pacific/Pohnpei",
-	1005 : "Pacific/Port_Moresby",
-	1006 : "Pacific/Rarotonga",
-	1007 : "Pacific/Tahiti",
-	1008 : "Pacific/Tarawa",
-	1009 : "Pacific/Tongatapu",
-	1010 : "Pacific/Wake",
-	1011 : "Pacific/Wallis",
+    1: "A",
+    2: "B",
+    3: "C",
+    4: "D",
+    5: "E",
+    6: "F",
+    7: "G",
+    8: "H",
+    9: "I",
+    10: "K",
+    11: "L",
+    12: "M",
+    13: "N",
+    14: "O",
+    15: "P",
+    16: "Q",
+    17: "R",
+    18: "S",
+    19: "T",
+    20: "U",
+    21: "V",
+    22: "W",
+    23: "X",
+    24: "Y",
+    25: "Z",
+    32: "AT",
+    40: "BT",
+    48: "CT",
+    56: "ET",
+    64: "GT",
+    72: "IT",
+    80: "KT",
+    88: "MT",
+    96: "PT",
+    104: "ST",
+    112: "UT",
+    120: "WT",
+    128: "ACT",
+    129: "ADT",
+    130: "AET",
+    131: "AFT",
+    132: "AMT",
+    133: "AoE",
+    134: "ART",
+    135: "AST",
+    136: "AZT",
+    144: "BDT",
+    145: "BNT",
+    146: "BOT",
+    147: "BRT",
+    148: "BST",
+    149: "BTT",
+    152: "CAT",
+    153: "CCT",
+    154: "CDT",
+    155: "CET",
+    156: "CIT",
+    157: "CKT",
+    158: "CLT",
+    159: "COT",
+    160: "CST",
+    161: "CVT",
+    162: "CXT",
+    168: "EAT",
+    169: "ECT",
+    170: "EDT",
+    171: "EET",
+    172: "EGT",
+    173: "EST",
+    176: "FET",
+    177: "FJT",
+    178: "FKT",
+    179: "FNT",
+    184: "GET",
+    185: "GFT",
+    186: "GMT",
+    187: "GST",
+    188: "GYT",
+    192: "HAA",
+    193: "HAC",
+    194: "HAE",
+    195: "HAP",
+    196: "HAR",
+    197: "HAT",
+    198: "HDT",
+    199: "HKT",
+    200: "HLV",
+    201: "HNA",
+    202: "HNC",
+    203: "HNE",
+    204: "HNP",
+    205: "HNR",
+    206: "HNT",
+    207: "HST",
+    208: "ICT",
+    209: "IDT",
+    210: "IOT",
+    211: "IST",
+    216: "JST",
+    224: "KGT",
+    225: "KIT",
+    226: "KST",
+    232: "MCK",
+    233: "MDT",
+    234: "MEZ",
+    235: "MHT",
+    236: "MMT",
+    237: "MSD",
+    238: "MSK",
+    239: "MST",
+    240: "MUT",
+    241: "MVT",
+    242: "MYT",
+    248: "NCT",
+    249: "NDT",
+    250: "NFT",
+    251: "NPT",
+    252: "NRT",
+    253: "NST",
+    254: "NUT",
+    256: "OEZ",
+    264: "PDT",
+    265: "PET",
+    266: "PGT",
+    267: "PHT",
+    268: "PKT",
+    269: "PST",
+    270: "PWT",
+    271: "PYT",
+    272: "RET",
+    280: "SBT",
+    281: "SCT",
+    282: "SGT",
+    283: "SRT",
+    284: "SST",
+    288: "TFT",
+    289: "TJT",
+    290: "TKT",
+    291: "TLT",
+    292: "TMT",
+    293: "TOT",
+    294: "TRT",
+    295: "TVT",
+    296: "UTC",
+    297: "UYT",
+    298: "UZT",
+    304: "VET",
+    305: "VUT",
+    312: "WAT",
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+    314: "WET",
+    315: "WEZ",
+    316: "WFT",
+    317: "WGT",
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+    319: "WIT",
+    320: "WST",
+    328: "ACDT",
+    329: "ACST",
+    330: "ADST",
+    331: "AEDT",
+    332: "AEST",
+    333: "AKDT",
+    334: "AKST",
+    335: "ALMT",
+    336: "AMDT",
+    337: "AMST",
+    338: "ANAT",
+    339: "AQTT",
+    340: "AWDT",
+    341: "AWST",
+    342: "AZOT",
+    343: "AZST",
+    344: "BDST",
+    345: "BRST",
+    352: "CAST",
+    353: "CDST",
+    354: "CEDT",
+    355: "CEST",
+    356: "CHOT",
+    357: "ChST",
+    358: "CHUT",
+    359: "CIST",
+    360: "CLDT",
+    361: "CLST",
+    368: "DAVT",
+    369: "DDUT",
+    376: "EADT",
+    377: "EAST",
+    378: "ECST",
+    379: "EDST",
+    380: "EEDT",
+    381: "EEST",
+    382: "EGST",
+    384: "FJDT",
+    385: "FJST",
+    386: "FKDT",
+    387: "FKST",
+    392: "GALT",
+    393: "GAMT",
+    394: "GILT",
+    400: "HADT",
+    401: "HAST",
+    402: "HOVT",
+    408: "IRDT",
+    409: "IRKT",
+    410: "IRST",
+    416: "KOST",
+    417: "KRAT",
+    418: "KUYT",
+    424: "LHDT",
+    425: "LHST",
+    426: "LINT",
+    432: "MAGT",
+    433: "MART",
+    434: "MAWT",
+    435: "MDST",
+    436: "MESZ",
+    440: "NFDT",
+    441: "NOVT",
+    442: "NZDT",
+    443: "NZST",
+    448: "OESZ",
+    449: "OMST",
+    450: "ORAT",
+    456: "PDST",
+    457: "PETT",
+    458: "PHOT",
+    459: "PMDT",
+    460: "PMST",
+    461: "PONT",
+    462: "PYST",
+    464: "QYZT",
+    472: "ROTT",
+    480: "SAKT",
+    481: "SAMT",
+    482: "SAST",
+    483: "SRET",
+    484: "SYOT",
+    488: "TAHT",
+    489: "TOST",
+    496: "ULAT",
+    497: "UYST",
+    504: "VLAT",
+    505: "VOST",
+    512: "WAKT",
+    513: "WAST",
+    514: "WEDT",
+    515: "WEST",
+    516: "WESZ",
+    517: "WGST",
+    518: "WITA",
+    520: "YAKT",
+    521: "YAPT",
+    522: "YEKT",
+    528: "ACWST",
+    529: "ANAST",
+    530: "AZODT",
+    531: "AZOST",
+    536: "CHADT",
+    537: "CHAST",
+    538: "CHODT",
+    539: "CHOST",
+    540: "CIDST",
+    544: "EASST",
+    545: "EFATE",
+    552: "HOVDT",
+    553: "HOVST",
+    560: "IRKST",
+    568: "KRAST",
+    576: "MAGST",
+    584: "NACDT",
+    585: "NACST",
+    586: "NAEDT",
+    587: "NAEST",
+    588: "NAMDT",
+    589: "NAMST",
+    590: "NAPDT",
+    591: "NAPST",
+    592: "NOVST",
+    600: "OMSST",
+    608: "PETST",
+    616: "SAMST",
+    624: "ULAST",
+    632: "VLAST",
+    640: "WARST",
+    648: "YAKST",
+    649: "YEKST",
+    656: "CHODST",
+    664: "HOVDST",
+    672: "Africa/Abidjan",
+    673: "Africa/Algiers",
+    674: "Africa/Bissau",
+    675: "Africa/Cairo",
+    676: "Africa/Casablanca",
+    677: "Africa/Ceuta",
+    678: "Africa/El_Aaiun",
+    679: "Africa/Johannesburg",
+    680: "Africa/Juba",
+    681: "Africa/Khartoum",
+    682: "Africa/Lagos",
+    683: "Africa/Maputo",
+    684: "Africa/Monrovia",
+    685: "Africa/Nairobi",
+    686: "Africa/Ndjamena",
+    687: "Africa/Sao_Tome",
+    688: "Africa/Tripoli",
+    689: "Africa/Tunis",
+    690: "Africa/Windhoek",
+    691: "America/Adak",
+    692: "America/Anchorage",
+    693: "America/Araguaina",
+    694: "America/Argentina/Buenos_Aires",
+    695: "America/Argentina/Catamarca",
+    696: "America/Argentina/Cordoba",
+    697: "America/Argentina/Jujuy",
+    698: "America/Argentina/La_Rioja",
+    699: "America/Argentina/Mendoza",
+    700: "America/Argentina/Rio_Gallegos",
+    701: "America/Argentina/Salta",
+    702: "America/Argentina/San_Juan",
+    703: "America/Argentina/San_Luis",
+    704: "America/Argentina/Tucuman",
+    705: "America/Argentina/Ushuaia",
+    706: "America/Asuncion",
+    707: "America/Bahia",
+    708: "America/Bahia_Banderas",
+    709: "America/Barbados",
+    710: "America/Belem",
+    711: "America/Belize",
+    712: "America/Boa_Vista",
+    713: "America/Bogota",
+    714: "America/Boise",
+    715: "America/Cambridge_Bay",
+    716: "America/Campo_Grande",
+    717: "America/Cancun",
+    718: "America/Caracas",
+    719: "America/Cayenne",
+    720: "America/Chicago",
+    721: "America/Chihuahua",
+    722: "America/Costa_Rica",
+    723: "America/Cuiaba",
+    724: "America/Danmarkshavn",
+    725: "America/Dawson",
+    726: "America/Dawson_Creek",
+    727: "America/Denver",
+    728: "America/Detroit",
+    729: "America/Edmonton",
+    730: "America/Eirunepe",
+    731: "America/El_Salvador",
+    732: "America/Fort_Nelson",
+    733: "America/Fortaleza",
+    734: "America/Glace_Bay",
+    735: "America/Goose_Bay",
+    736: "America/Grand_Turk",
+    737: "America/Guatemala",
+    738: "America/Guayaquil",
+    739: "America/Guyana",
+    740: "America/Halifax",
+    741: "America/Havana",
+    742: "America/Hermosillo",
+    743: "America/Indiana/Indianapolis",
+    744: "America/Indiana/Knox",
+    745: "America/Indiana/Marengo",
+    746: "America/Indiana/Petersburg",
+    747: "America/Indiana/Tell_City",
+    748: "America/Indiana/Vevay",
+    749: "America/Indiana/Vincennes",
+    750: "America/Indiana/Winamac",
+    751: "America/Inuvik",
+    752: "America/Iqaluit",
+    753: "America/Jamaica",
+    754: "America/Juneau",
+    755: "America/Kentucky/Louisville",
+    756: "America/Kentucky/Monticello",
+    757: "America/La_Paz",
+    758: "America/Lima",
+    759: "America/Los_Angeles",
+    760: "America/Maceio",
+    761: "America/Managua",
+    762: "America/Manaus",
+    763: "America/Martinique",
+    764: "America/Matamoros",
+    765: "America/Mazatlan",
+    766: "America/Menominee",
+    767: "America/Merida",
+    768: "America/Metlakatla",
+    769: "America/Mexico_City",
+    770: "America/Miquelon",
+    771: "America/Moncton",
+    772: "America/Monterrey",
+    773: "America/Montevideo",
+    774: "America/New_York",
+    775: "America/Nipigon",
+    776: "America/Nome",
+    777: "America/Noronha",
+    778: "America/North_Dakota/Beulah",
+    779: "America/North_Dakota/Center",
+    780: "America/North_Dakota/New_Salem",
+    781: "America/Nuuk",
+    782: "America/Ojinaga",
+    783: "America/Panama",
+    784: "America/Pangnirtung",
+    785: "America/Paramaribo",
+    786: "America/Phoenix",
+    787: "America/Port-au-Prince",
+    788: "America/Porto_Velho",
+    789: "America/Puerto_Rico",
+    790: "America/Punta_Arenas",
+    791: "America/Rainy_River",
+    792: "America/Rankin_Inlet",
+    793: "America/Recife",
+    794: "America/Regina",
+    795: "America/Resolute",
+    796: "America/Rio_Branco",
+    797: "America/Santarem",
+    798: "America/Santiago",
+    799: "America/Santo_Domingo",
+    800: "America/Sao_Paulo",
+    801: "America/Scoresbysund",
+    802: "America/Sitka",
+    803: "America/St_Johns",
+    804: "America/Swift_Current",
+    805: "America/Tegucigalpa",
+    806: "America/Thule",
+    807: "America/Thunder_Bay",
+    808: "America/Tijuana",
+    809: "America/Toronto",
+    810: "America/Vancouver",
+    811: "America/Whitehorse",
+    812: "America/Winnipeg",
+    813: "America/Yakutat",
+    814: "America/Yellowknife",
+    815: "Antarctica/Casey",
+    816: "Antarctica/Davis",
+    817: "Antarctica/Macquarie",
+    818: "Antarctica/Mawson",
+    819: "Antarctica/Palmer",
+    820: "Antarctica/Rothera",
+    821: "Antarctica/Troll",
+    822: "Antarctica/Vostok",
+    823: "Asia/Almaty",
+    824: "Asia/Amman",
+    825: "Asia/Anadyr",
+    826: "Asia/Aqtau",
+    827: "Asia/Aqtobe",
+    828: "Asia/Ashgabat",
+    829: "Asia/Atyrau",
+    830: "Asia/Baghdad",
+    831: "Asia/Baku",
+    832: "Asia/Bangkok",
+    833: "Asia/Barnaul",
+    834: "Asia/Beirut",
+    835: "Asia/Bishkek",
+    836: "Asia/Brunei",
+    837: "Asia/Chita",
+    838: "Asia/Choibalsan",
+    839: "Asia/Colombo",
+    840: "Asia/Damascus",
+    841: "Asia/Dhaka",
+    842: "Asia/Dili",
+    843: "Asia/Dubai",
+    844: "Asia/Dushanbe",
+    845: "Asia/Famagusta",
+    846: "Asia/Gaza",
+    847: "Asia/Hebron",
+    848: "Asia/Ho_Chi_Minh",
+    849: "Asia/Hong_Kong",
+    850: "Asia/Hovd",
+    851: "Asia/Irkutsk",
+    852: "Asia/Jakarta",
+    853: "Asia/Jayapura",
+    854: "Asia/Jerusalem",
+    855: "Asia/Kabul",
+    856: "Asia/Kamchatka",
+    857: "Asia/Karachi",
+    858: "Asia/Kathmandu",
+    859: "Asia/Khandyga",
+    860: "Asia/Kolkata",
+    861: "Asia/Krasnoyarsk",
+    862: "Asia/Kuala_Lumpur",
+    863: "Asia/Kuching",
+    864: "Asia/Macau",
+    865: "Asia/Magadan",
+    866: "Asia/Makassar",
+    867: "Asia/Manila",
+    868: "Asia/Nicosia",
+    869: "Asia/Novokuznetsk",
+    870: "Asia/Novosibirsk",
+    871: "Asia/Omsk",
+    872: "Asia/Oral",
+    873: "Asia/Pontianak",
+    874: "Asia/Pyongyang",
+    875: "Asia/Qatar",
+    876: "Asia/Qostanay",
+    877: "Asia/Qyzylorda",
+    878: "Asia/Riyadh",
+    879: "Asia/Sakhalin",
+    880: "Asia/Samarkand",
+    881: "Asia/Seoul",
+    882: "Asia/Shanghai",
+    883: "Asia/Singapore",
+    884: "Asia/Srednekolymsk",
+    885: "Asia/Taipei",
+    886: "Asia/Tashkent",
+    887: "Asia/Tbilisi",
+    888: "Asia/Tehran",
+    889: "Asia/Thimphu",
+    890: "Asia/Tokyo",
+    891: "Asia/Tomsk",
+    892: "Asia/Ulaanbaatar",
+    893: "Asia/Urumqi",
+    894: "Asia/Ust-Nera",
+    895: "Asia/Vladivostok",
+    896: "Asia/Yakutsk",
+    897: "Asia/Yangon",
+    898: "Asia/Yekaterinburg",
+    899: "Asia/Yerevan",
+    900: "Atlantic/Azores",
+    901: "Atlantic/Bermuda",
+    902: "Atlantic/Canary",
+    903: "Atlantic/Cape_Verde",
+    904: "Atlantic/Faroe",
+    905: "Atlantic/Madeira",
+    906: "Atlantic/Reykjavik",
+    907: "Atlantic/South_Georgia",
+    908: "Atlantic/Stanley",
+    909: "Australia/Adelaide",
+    910: "Australia/Brisbane",
+    911: "Australia/Broken_Hill",
+    912: "Australia/Darwin",
+    913: "Australia/Eucla",
+    914: "Australia/Hobart",
+    915: "Australia/Lindeman",
+    916: "Australia/Lord_Howe",
+    917: "Australia/Melbourne",
+    918: "Australia/Perth",
+    919: "Australia/Sydney",
+    920: "Etc/GMT",
+    921: "Etc/UTC",
+    922: "Europe/Amsterdam",
+    923: "Europe/Andorra",
+    924: "Europe/Astrakhan",
+    925: "Europe/Athens",
+    926: "Europe/Belgrade",
+    927: "Europe/Berlin",
+    928: "Europe/Brussels",
+    929: "Europe/Bucharest",
+    930: "Europe/Budapest",
+    931: "Europe/Chisinau",
+    932: "Europe/Copenhagen",
+    933: "Europe/Dublin",
+    934: "Europe/Gibraltar",
+    935: "Europe/Helsinki",
+    936: "Europe/Istanbul",
+    937: "Europe/Kaliningrad",
+    938: "Europe/Kiev",
+    939: "Europe/Kirov",
+    940: "Europe/Lisbon",
+    941: "Europe/London",
+    942: "Europe/Luxembourg",
+    943: "Europe/Madrid",
+    944: "Europe/Malta",
+    945: "Europe/Minsk",
+    946: "Europe/Monaco",
+    947: "Europe/Moscow",
+    948: "Europe/Oslo",
+    949: "Europe/Paris",
+    950: "Europe/Prague",
+    951: "Europe/Riga",
+    952: "Europe/Rome",
+    953: "Europe/Samara",
+    954: "Europe/Saratov",
+    955: "Europe/Simferopol",
+    956: "Europe/Sofia",
+    957: "Europe/Stockholm",
+    958: "Europe/Tallinn",
+    959: "Europe/Tirane",
+    960: "Europe/Ulyanovsk",
+    961: "Europe/Uzhgorod",
+    962: "Europe/Vienna",
+    963: "Europe/Vilnius",
+    964: "Europe/Volgograd",
+    965: "Europe/Warsaw",
+    966: "Europe/Zaporozhye",
+    967: "Europe/Zurich",
+    968: "Indian/Chagos",
+    969: "Indian/Christmas",
+    970: "Indian/Cocos",
+    971: "Indian/Kerguelen",
+    972: "Indian/Mahe",
+    973: "Indian/Maldives",
+    974: "Indian/Mauritius",
+    975: "Indian/Reunion",
+    976: "Pacific/Apia",
+    977: "Pacific/Auckland",
+    978: "Pacific/Bougainville",
+    979: "Pacific/Chatham",
+    980: "Pacific/Chuuk",
+    981: "Pacific/Easter",
+    982: "Pacific/Efate",
+    983: "Pacific/Fakaofo",
+    984: "Pacific/Fiji",
+    985: "Pacific/Funafuti",
+    986: "Pacific/Galapagos",
+    987: "Pacific/Gambier",
+    988: "Pacific/Guadalcanal",
+    989: "Pacific/Guam",
+    990: "Pacific/Honolulu",
+    991: "Pacific/Kanton",
+    992: "Pacific/Kiritimati",
+    993: "Pacific/Kosrae",
+    994: "Pacific/Kwajalein",
+    995: "Pacific/Majuro",
+    996: "Pacific/Marquesas",
+    997: "Pacific/Nauru",
+    998: "Pacific/Niue",
+    999: "Pacific/Norfolk",
+    1000: "Pacific/Noumea",
+    1001: "Pacific/Pago_Pago",
+    1002: "Pacific/Palau",
+    1003: "Pacific/Pitcairn",
+    1004: "Pacific/Pohnpei",
+    1005: "Pacific/Port_Moresby",
+    1006: "Pacific/Rarotonga",
+    1007: "Pacific/Tahiti",
+    1008: "Pacific/Tarawa",
+    1009: "Pacific/Tongatapu",
+    1010: "Pacific/Wake",
+    1011: "Pacific/Wallis",
 }
 
 timezoneToIndex = {
-	"A" : 1,
-	"B" : 2,
-	"C" : 3,
-	"D" : 4,
-	"E" : 5,
-	"F" : 6,
-	"G" : 7,
-	"H" : 8,
-	"I" : 9,
-	"K" : 10,
-	"L" : 11,
-	"M" : 12,
-	"N" : 13,
-	"O" : 14,
-	"P" : 15,
-	"Q" : 16,
-	"R" : 17,
-	"S" : 18,
-	"T" : 19,
-	"U" : 20,
-	"V" : 21,
-	"W" : 22,
-	"X" : 23,
-	"Y" : 24,
-	"Z" : 25,
-	"AT" : 32,
-	"BT" : 40,
-	"CT" : 48,
-	"ET" : 56,
-	"GT" : 64,
-	"IT" : 72,
-	"KT" : 80,
-	"MT" : 88,
-	"PT" : 96,
-	"ST" : 104,
-	"UT" : 112,
-	"WT" : 120,
-	"ACT" : 128,
-	"ADT" : 129,
-	"AET" : 130,
-	"AFT" : 131,
-	"AMT" : 132,
-	"AoE" : 133,
-	"ART" : 134,
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-	"AZT" : 136,
-	"BDT" : 144,
-	"BNT" : 145,
-	"BOT" : 146,
-	"BRT" : 147,
-	"BST" : 148,
-	"BTT" : 149,
-	"CAT" : 152,
-	"CCT" : 153,
-	"CDT" : 154,
-	"CET" : 155,
-	"CIT" : 156,
-	"CKT" : 157,
-	"CLT" : 158,
-	"COT" : 159,
-	"CST" : 160,
-	"CVT" : 161,
-	"CXT" : 162,
-	"EAT" : 168,
-	"ECT" : 169,
-	"EDT" : 170,
-	"EET" : 171,
-	"EGT" : 172,
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-	"FET" : 176,
-	"FJT" : 177,
-	"FKT" : 178,
-	"FNT" : 179,
-	"GET" : 184,
-	"GFT" : 185,
-	"GMT" : 186,
-	"GST" : 187,
-	"GYT" : 188,
-	"HAA" : 192,
-	"HAC" : 193,
-	"HAE" : 194,
-	"HAP" : 195,
-	"HAR" : 196,
-	"HAT" : 197,
-	"HDT" : 198,
-	"HKT" : 199,
-	"HLV" : 200,
-	"HNA" : 201,
-	"HNC" : 202,
-	"HNE" : 203,
-	"HNP" : 204,
-	"HNR" : 205,
-	"HNT" : 206,
-	"HST" : 207,
-	"ICT" : 208,
-	"IDT" : 209,
-	"IOT" : 210,
-	"IST" : 211,
-	"JST" : 216,
-	"KGT" : 224,
-	"KIT" : 225,
-	"KST" : 226,
-	"MCK" : 232,
-	"MDT" : 233,
-	"MEZ" : 234,
-	"MHT" : 235,
-	"MMT" : 236,
-	"MSD" : 237,
-	"MSK" : 238,
-	"MST" : 239,
-	"MUT" : 240,
-	"MVT" : 241,
-	"MYT" : 242,
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-	"NPT" : 251,
-	"NRT" : 252,
-	"NST" : 253,
-	"NUT" : 254,
-	"OEZ" : 256,
-	"PDT" : 264,
-	"PET" : 265,
-	"PGT" : 266,
-	"PHT" : 267,
-	"PKT" : 268,
-	"PST" : 269,
-	"PWT" : 270,
-	"PYT" : 271,
-	"RET" : 272,
-	"SBT" : 280,
-	"SCT" : 281,
-	"SGT" : 282,
-	"SRT" : 283,
-	"SST" : 284,
-	"TFT" : 288,
-	"TJT" : 289,
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-	"TLT" : 291,
-	"TMT" : 292,
-	"TOT" : 293,
-	"TRT" : 294,
-	"TVT" : 295,
-	"UTC" : 296,
-	"UYT" : 297,
-	"UZT" : 298,
-	"VET" : 304,
-	"VUT" : 305,
-	"WAT" : 312,
-	"WDT" : 313,
-	"WET" : 314,
-	"WEZ" : 315,
-	"WFT" : 316,
-	"WGT" : 317,
-	"WIB" : 318,
-	"WIT" : 319,
-	"WST" : 320,
-	"ACDT" : 328,
-	"ACST" : 329,
-	"ADST" : 330,
-	"AEDT" : 331,
-	"AEST" : 332,
-	"AKDT" : 333,
-	"AKST" : 334,
-	"ALMT" : 335,
-	"AMDT" : 336,
-	"AMST" : 337,
-	"ANAT" : 338,
-	"AQTT" : 339,
-	"AWDT" : 340,
-	"AWST" : 341,
-	"AZOT" : 342,
-	"AZST" : 343,
-	"BDST" : 344,
-	"BRST" : 345,
-	"CAST" : 352,
-	"CDST" : 353,
-	"CEDT" : 354,
-	"CEST" : 355,
-	"CHOT" : 356,
-	"ChST" : 357,
-	"CHUT" : 358,
-	"CIST" : 359,
-	"CLDT" : 360,
-	"CLST" : 361,
-	"DAVT" : 368,
-	"DDUT" : 369,
-	"EADT" : 376,
-	"EAST" : 377,
-	"ECST" : 378,
-	"EDST" : 379,
-	"EEDT" : 380,
-	"EEST" : 381,
-	"EGST" : 382,
-	"FJDT" : 384,
-	"FJST" : 385,
-	"FKDT" : 386,
-	"FKST" : 387,
-	"GALT" : 392,
-	"GAMT" : 393,
-	"GILT" : 394,
-	"HADT" : 400,
-	"HAST" : 401,
-	"HOVT" : 402,
-	"IRDT" : 408,
-	"IRKT" : 409,
-	"IRST" : 410,
-	"KOST" : 416,
-	"KRAT" : 417,
-	"KUYT" : 418,
-	"LHDT" : 424,
-	"LHST" : 425,
-	"LINT" : 426,
-	"MAGT" : 432,
-	"MART" : 433,
-	"MAWT" : 434,
-	"MDST" : 435,
-	"MESZ" : 436,
-	"NFDT" : 440,
-	"NOVT" : 441,
-	"NZDT" : 442,
-	"NZST" : 443,
-	"OESZ" : 448,
-	"OMST" : 449,
-	"ORAT" : 450,
-	"PDST" : 456,
-	"PETT" : 457,
-	"PHOT" : 458,
-	"PMDT" : 459,
-	"PMST" : 460,
-	"PONT" : 461,
-	"PYST" : 462,
-	"QYZT" : 464,
-	"ROTT" : 472,
-	"SAKT" : 480,
-	"SAMT" : 481,
-	"SAST" : 482,
-	"SRET" : 483,
-	"SYOT" : 484,
-	"TAHT" : 488,
-	"TOST" : 489,
-	"ULAT" : 496,
-	"UYST" : 497,
-	"VLAT" : 504,
-	"VOST" : 505,
-	"WAKT" : 512,
-	"WAST" : 513,
-	"WEDT" : 514,
-	"WEST" : 515,
-	"WESZ" : 516,
-	"WGST" : 517,
-	"WITA" : 518,
-	"YAKT" : 520,
-	"YAPT" : 521,
-	"YEKT" : 522,
-	"ACWST" : 528,
-	"ANAST" : 529,
-	"AZODT" : 530,
-	"AZOST" : 531,
-	"CHADT" : 536,
-	"CHAST" : 537,
-	"CHODT" : 538,
-	"CHOST" : 539,
-	"CIDST" : 540,
-	"EASST" : 544,
-	"EFATE" : 545,
-	"HOVDT" : 552,
-	"HOVST" : 553,
-	"IRKST" : 560,
-	"KRAST" : 568,
-	"MAGST" : 576,
-	"NACDT" : 584,
-	"NACST" : 585,
-	"NAEDT" : 586,
-	"NAEST" : 587,
-	"NAMDT" : 588,
-	"NAMST" : 589,
-	"NAPDT" : 590,
-	"NAPST" : 591,
-	"NOVST" : 592,
-	"OMSST" : 600,
-	"PETST" : 608,
-	"SAMST" : 616,
-	"ULAST" : 624,
-	"VLAST" : 632,
-	"WARST" : 640,
-	"YAKST" : 648,
-	"YEKST" : 649,
-	"CHODST" : 656,
-	"HOVDST" : 664,
-	"Africa/Abidjan" : 672,
-	"Africa/Algiers" : 673,
-	"Africa/Bissau" : 674,
-	"Africa/Cairo" : 675,
-	"Africa/Casablanca" : 676,
-	"Africa/Ceuta" : 677,
-	"Africa/El_Aaiun" : 678,
-	"Africa/Johannesburg" : 679,
-	"Africa/Juba" : 680,
-	"Africa/Khartoum" : 681,
-	"Africa/Lagos" : 682,
-	"Africa/Maputo" : 683,
-	"Africa/Monrovia" : 684,
-	"Africa/Nairobi" : 685,
-	"Africa/Ndjamena" : 686,
-	"Africa/Sao_Tome" : 687,
-	"Africa/Tripoli" : 688,
-	"Africa/Tunis" : 689,
-	"Africa/Windhoek" : 690,
-	"America/Adak" : 691,
-	"America/Anchorage" : 692,
-	"America/Araguaina" : 693,
-	"America/Argentina/Buenos_Aires" : 694,
-	"America/Argentina/Catamarca" : 695,
-	"America/Argentina/Cordoba" : 696,
-	"America/Argentina/Jujuy" : 697,
-	"America/Argentina/La_Rioja" : 698,
-	"America/Argentina/Mendoza" : 699,
-	"America/Argentina/Rio_Gallegos" : 700,
-	"America/Argentina/Salta" : 701,
-	"America/Argentina/San_Juan" : 702,
-	"America/Argentina/San_Luis" : 703,
-	"America/Argentina/Tucuman" : 704,
-	"America/Argentina/Ushuaia" : 705,
-	"America/Asuncion" : 706,
-	"America/Bahia" : 707,
-	"America/Bahia_Banderas" : 708,
-	"America/Barbados" : 709,
-	"America/Belem" : 710,
-	"America/Belize" : 711,
-	"America/Boa_Vista" : 712,
-	"America/Bogota" : 713,
-	"America/Boise" : 714,
-	"America/Cambridge_Bay" : 715,
-	"America/Campo_Grande" : 716,
-	"America/Cancun" : 717,
-	"America/Caracas" : 718,
-	"America/Cayenne" : 719,
-	"America/Chicago" : 720,
-	"America/Chihuahua" : 721,
-	"America/Costa_Rica" : 722,
-	"America/Cuiaba" : 723,
-	"America/Danmarkshavn" : 724,
-	"America/Dawson" : 725,
-	"America/Dawson_Creek" : 726,
-	"America/Denver" : 727,
-	"America/Detroit" : 728,
-	"America/Edmonton" : 729,
-	"America/Eirunepe" : 730,
-	"America/El_Salvador" : 731,
-	"America/Fort_Nelson" : 732,
-	"America/Fortaleza" : 733,
-	"America/Glace_Bay" : 734,
-	"America/Goose_Bay" : 735,
-	"America/Grand_Turk" : 736,
-	"America/Guatemala" : 737,
-	"America/Guayaquil" : 738,
-	"America/Guyana" : 739,
-	"America/Halifax" : 740,
-	"America/Havana" : 741,
-	"America/Hermosillo" : 742,
-	"America/Indiana/Indianapolis" : 743,
-	"America/Indiana/Knox" : 744,
-	"America/Indiana/Marengo" : 745,
-	"America/Indiana/Petersburg" : 746,
-	"America/Indiana/Tell_City" : 747,
-	"America/Indiana/Vevay" : 748,
-	"America/Indiana/Vincennes" : 749,
-	"America/Indiana/Winamac" : 750,
-	"America/Inuvik" : 751,
-	"America/Iqaluit" : 752,
-	"America/Jamaica" : 753,
-	"America/Juneau" : 754,
-	"America/Kentucky/Louisville" : 755,
-	"America/Kentucky/Monticello" : 756,
-	"America/La_Paz" : 757,
-	"America/Lima" : 758,
-	"America/Los_Angeles" : 759,
-	"America/Maceio" : 760,
-	"America/Managua" : 761,
-	"America/Manaus" : 762,
-	"America/Martinique" : 763,
-	"America/Matamoros" : 764,
-	"America/Mazatlan" : 765,
-	"America/Menominee" : 766,
-	"America/Merida" : 767,
-	"America/Metlakatla" : 768,
-	"America/Mexico_City" : 769,
-	"America/Miquelon" : 770,
-	"America/Moncton" : 771,
-	"America/Monterrey" : 772,
-	"America/Montevideo" : 773,
-	"America/New_York" : 774,
-	"America/Nipigon" : 775,
-	"America/Nome" : 776,
-	"America/Noronha" : 777,
-	"America/North_Dakota/Beulah" : 778,
-	"America/North_Dakota/Center" : 779,
-	"America/North_Dakota/New_Salem" : 780,
-	"America/Nuuk" : 781,
-	"America/Ojinaga" : 782,
-	"America/Panama" : 783,
-	"America/Pangnirtung" : 784,
-	"America/Paramaribo" : 785,
-	"America/Phoenix" : 786,
-	"America/Port-au-Prince" : 787,
-	"America/Porto_Velho" : 788,
-	"America/Puerto_Rico" : 789,
-	"America/Punta_Arenas" : 790,
-	"America/Rainy_River" : 791,
-	"America/Rankin_Inlet" : 792,
-	"America/Recife" : 793,
-	"America/Regina" : 794,
-	"America/Resolute" : 795,
-	"America/Rio_Branco" : 796,
-	"America/Santarem" : 797,
-	"America/Santiago" : 798,
-	"America/Santo_Domingo" : 799,
-	"America/Sao_Paulo" : 800,
-	"America/Scoresbysund" : 801,
-	"America/Sitka" : 802,
-	"America/St_Johns" : 803,
-	"America/Swift_Current" : 804,
-	"America/Tegucigalpa" : 805,
-	"America/Thule" : 806,
-	"America/Thunder_Bay" : 807,
-	"America/Tijuana" : 808,
-	"America/Toronto" : 809,
-	"America/Vancouver" : 810,
-	"America/Whitehorse" : 811,
-	"America/Winnipeg" : 812,
-	"America/Yakutat" : 813,
-	"America/Yellowknife" : 814,
-	"Antarctica/Casey" : 815,
-	"Antarctica/Davis" : 816,
-	"Antarctica/Macquarie" : 817,
-	"Antarctica/Mawson" : 818,
-	"Antarctica/Palmer" : 819,
-	"Antarctica/Rothera" : 820,
-	"Antarctica/Troll" : 821,
-	"Antarctica/Vostok" : 822,
-	"Asia/Almaty" : 823,
-	"Asia/Amman" : 824,
-	"Asia/Anadyr" : 825,
-	"Asia/Aqtau" : 826,
-	"Asia/Aqtobe" : 827,
-	"Asia/Ashgabat" : 828,
-	"Asia/Atyrau" : 829,
-	"Asia/Baghdad" : 830,
-	"Asia/Baku" : 831,
-	"Asia/Bangkok" : 832,
-	"Asia/Barnaul" : 833,
-	"Asia/Beirut" : 834,
-	"Asia/Bishkek" : 835,
-	"Asia/Brunei" : 836,
-	"Asia/Chita" : 837,
-	"Asia/Choibalsan" : 838,
-	"Asia/Colombo" : 839,
-	"Asia/Damascus" : 840,
-	"Asia/Dhaka" : 841,
-	"Asia/Dili" : 842,
-	"Asia/Dubai" : 843,
-	"Asia/Dushanbe" : 844,
-	"Asia/Famagusta" : 845,
-	"Asia/Gaza" : 846,
-	"Asia/Hebron" : 847,
-	"Asia/Ho_Chi_Minh" : 848,
-	"Asia/Hong_Kong" : 849,
-	"Asia/Hovd" : 850,
-	"Asia/Irkutsk" : 851,
-	"Asia/Jakarta" : 852,
-	"Asia/Jayapura" : 853,
-	"Asia/Jerusalem" : 854,
-	"Asia/Kabul" : 855,
-	"Asia/Kamchatka" : 856,
-	"Asia/Karachi" : 857,
-	"Asia/Kathmandu" : 858,
-	"Asia/Khandyga" : 859,
-	"Asia/Kolkata" : 860,
-	"Asia/Krasnoyarsk" : 861,
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+    "BST": {"offset": 0, "category": TZ_AMBIGUOUS},
+    "BTT": {"offset": 360, "category": 0},
+    "CAT": {"offset": 120, "category": 0},
+    "CCT": {"offset": 390, "category": 0},
+    "CDT": {"offset": -300, "category": TZ_RFC | TZ_AMBIGUOUS | TZ_DST},
+    "CET": {"offset": 60, "category": 0},
+    "CIT": {"offset": -300, "category": 0},
+    "CKT": {"offset": -600, "category": 0},
+    "CLT": {"offset": -180, "category": 0},
+    "COT": {"offset": -300, "category": 0},
+    "CST": {"offset": -360, "category": TZ_RFC | TZ_AMBIGUOUS},
+    "CVT": {"offset": -60, "category": 0},
+    "CXT": {"offset": 420, "category": 0},
+    "EAT": {"offset": 180, "category": 0},
+    "ECT": {"offset": 0, "category": TZ_AMBIGUOUS},
+    "EDT": {"offset": -240, "category": TZ_RFC | TZ_AMBIGUOUS | TZ_DST},
+    "EET": {"offset": 120, "category": 0},
+    "EGT": {"offset": -60, "category": 0},
+    "EST": {"offset": -300, "category": TZ_RFC | TZ_AMBIGUOUS},
+    "FET": {"offset": 180, "category": 0},
+    "FJT": {"offset": 720, "category": 0},
+    "FKT": {"offset": -240, "category": 0},
+    "FNT": {"offset": -120, "category": 0},
+    "GET": {"offset": 240, "category": 0},
+    "GFT": {"offset": -180, "category": 0},
+    "GMT": {"offset": 0, "category": TZ_UTC | TZ_RFC},
+    "GST": {"offset": 0, "category": TZ_AMBIGUOUS},
+    "GYT": {"offset": -240, "category": 0},
+    "HAA": {"offset": -180, "category": 0},
+    "HAC": {"offset": -300, "category": 0},
+    "HAE": {"offset": -240, "category": 0},
+    "HAP": {"offset": -420, "category": 0},
+    "HAR": {"offset": -360, "category": 0},
+    "HAT": {"offset": -90, "category": 0},
+    "HDT": {"offset": -540, "category": TZ_DST},
+    "HKT": {"offset": 480, "category": 0},
+    "HLV": {"offset": -210, "category": 0},
+    "HNA": {"offset": -240, "category": 0},
+    "HNC": {"offset": -360, "category": 0},
+    "HNE": {"offset": -300, "category": 0},
+    "HNP": {"offset": -480, "category": 0},
+    "HNR": {"offset": -420, "category": 0},
+    "HNT": {"offset": -150, "category": 0},
+    "HST": {"offset": -600, "category": 0},
+    "ICT": {"offset": 420, "category": 0},
+    "IDT": {"offset": 0, "category": TZ_AMBIGUOUS | TZ_DST},
+    "IOT": {"offset": 360, "category": 0},
+    "IST": {"offset": 0, "category": TZ_AMBIGUOUS},
+    "JST": {"offset": 540, "category": 0},
+    "KGT": {"offset": 360, "category": 0},
+    "KIT": {"offset": 300, "category": 0},
+    "KST": {"offset": 540, "category": 0},
+    "MCK": {"offset": 180, "category": 0},
+    "MDT": {"offset": -360, "category": TZ_RFC | TZ_DST},
+    "MEZ": {"offset": 60, "category": 0},
+    "MHT": {"offset": 720, "category": 0},
+    "MMT": {"offset": 390, "category": 0},
+    "MSD": {"offset": 240, "category": TZ_DST},
+    "MSK": {"offset": 180, "category": 0},
+    "MST": {"offset": -420, "category": TZ_RFC | TZ_AMBIGUOUS},
+    "MUT": {"offset": 240, "category": 0},
+    "MVT": {"offset": 300, "category": 0},
+    "MYT": {"offset": 480, "category": 0},
+    "NCT": {"offset": 660, "category": 0},
+    "NDT": {"offset": -90, "category": TZ_DST},
+    "NFT": {"offset": 660, "category": 0},
+    "NPT": {"offset": 345, "category": 0},
+    "NRT": {"offset": 720, "category": 0},
+    "NST": {"offset": -150, "category": 0},
+    "NUT": {"offset": -660, "category": 0},
+    "OEZ": {"offset": 120, "category": 0},
+    "PDT": {"offset": -420, "category": TZ_RFC | TZ_DST},
+    "PET": {"offset": -300, "category": 0},
+    "PGT": {"offset": 600, "category": 0},
+    "PHT": {"offset": 480, "category": 0},
+    "PKT": {"offset": 300, "category": 0},
+    "PST": {"offset": -480, "category": TZ_RFC | TZ_AMBIGUOUS},
+    "PWT": {"offset": 540, "category": 0},
+    "PYT": {"offset": 0, "category": TZ_AMBIGUOUS},
+    "RET": {"offset": 240, "category": 0},
+    "SBT": {"offset": 660, "category": 0},
+    "SCT": {"offset": 240, "category": 0},
+    "SGT": {"offset": 480, "category": 0},
+    "SRT": {"offset": -180, "category": 0},
+    "SST": {"offset": 0, "category": TZ_AMBIGUOUS},
+    "TFT": {"offset": 300, "category": 0},
+    "TJT": {"offset": 300, "category": 0},
+    "TKT": {"offset": 780, "category": 0},
+    "TLT": {"offset": 540, "category": 0},
+    "TMT": {"offset": 300, "category": 0},
+    "TOT": {"offset": 780, "category": 0},
+    "TRT": {"offset": 180, "category": 0},
+    "TVT": {"offset": 720, "category": 0},
+    "UTC": {"offset": 0, "category": TZ_UTC | TZ_RFC},
+    "UYT": {"offset": -180, "category": 0},
+    "UZT": {"offset": 300, "category": 0},
+    "VET": {"offset": -210, "category": 0},
+    "VUT": {"offset": 660, "category": 0},
+    "WAT": {"offset": 0, "category": TZ_AMBIGUOUS},
+    "WDT": {"offset": 540, "category": TZ_DST},
+    "WET": {"offset": 0, "category": 0},
+    "WEZ": {"offset": 0, "category": 0},
+    "WFT": {"offset": 720, "category": 0},
+    "WGT": {"offset": -180, "category": 0},
+    "WIB": {"offset": 420, "category": 0},
+    "WIT": {"offset": 540, "category": 0},
+    "WST": {"offset": 0, "category": TZ_AMBIGUOUS},
+    "ACDT": {"offset": 630, "category": TZ_DST},
+    "ACST": {"offset": 570, "category": 0},
+    "ADST": {"offset": 0, "category": TZ_AMBIGUOUS | TZ_DST},
+    "AEDT": {"offset": 660, "category": TZ_DST},
+    "AEST": {"offset": 600, "category": 0},
+    "AKDT": {"offset": -480, "category": TZ_DST},
+    "AKST": {"offset": -540, "category": 0},
+    "ALMT": {"offset": 360, "category": 0},
+    "AMDT": {"offset": 300, "category": TZ_DST},
+    "AMST": {"offset": 0, "category": TZ_AMBIGUOUS | TZ_DST},
+    "ANAT": {"offset": 720, "category": 0},
+    "AQTT": {"offset": 300, "category": 0},
+    "AWDT": {"offset": 540, "category": TZ_DST},
+    "AWST": {"offset": 480, "category": 0},
+    "AZOT": {"offset": -60, "category": 0},
+    "AZST": {"offset": 300, "category": TZ_DST},
+    "BDST": {"offset": 60, "category": TZ_DST},
+    "BRST": {"offset": -120, "category": TZ_DST},
+    "CAST": {"offset": 480, "category": 0},
+    "CDST": {"offset": 0, "category": TZ_AMBIGUOUS | TZ_DST},
+    "CEDT": {"offset": 120, "category": TZ_DST},
+    "CEST": {"offset": 120, "category": TZ_DST},
+    "CHOT": {"offset": 480, "category": 0},
+    "ChST": {"offset": 600, "category": 0},
+    "CHUT": {"offset": 600, "category": 0},
+    "CIST": {"offset": -300, "category": 0},
+    "CLDT": {"offset": -180, "category": TZ_DST},
+    "CLST": {"offset": 0, "category": TZ_AMBIGUOUS},
+    "DAVT": {"offset": 420, "category": 0},
+    "DDUT": {"offset": 600, "category": 0},
+    "EADT": {"offset": -300, "category": TZ_DST},
+    "EAST": {"offset": -300, "category": 0},
+    "ECST": {"offset": 120, "category": TZ_DST},
+    "EDST": {"offset": 0, "category": TZ_AMBIGUOUS | TZ_DST},
+    "EEDT": {"offset": 180, "category": TZ_DST},
+    "EEST": {"offset": 180, "category": TZ_DST},
+    "EGST": {"offset": 0, "category": TZ_DST},
+    "FJDT": {"offset": 780, "category": TZ_DST},
+    "FJST": {"offset": 780, "category": TZ_DST},
+    "FKDT": {"offset": -180, "category": TZ_DST},
+    "FKST": {"offset": 0, "category": TZ_AMBIGUOUS | TZ_DST},
+    "GALT": {"offset": -360, "category": 0},
+    "GAMT": {"offset": -540, "category": 0},
+    "GILT": {"offset": 720, "category": 0},
+    "HADT": {"offset": -540, "category": TZ_DST},
+    "HAST": {"offset": -600, "category": 0},
+    "HOVT": {"offset": 420, "category": 0},
+    "IRDT": {"offset": 270, "category": TZ_DST},
+    "IRKT": {"offset": 480, "category": 0},
+    "IRST": {"offset": 0, "category": TZ_AMBIGUOUS | TZ_DST},
+    "KOST": {"offset": 660, "category": 0},
+    "KRAT": {"offset": 420, "category": 0},
+    "KUYT": {"offset": 240, "category": 0},
+    "LHDT": {"offset": 660, "category": TZ_DST},
+    "LHST": {"offset": 630, "category": 0},
+    "LINT": {"offset": 840, "category": 0},
+    "MAGT": {"offset": 600, "category": 0},
+    "MART": {"offset": -510, "category": 0},
+    "MAWT": {"offset": 300, "category": 0},
+    "MDST": {"offset": -360, "category": TZ_DST},
+    "MESZ": {"offset": 120, "category": 0},
+    "NFDT": {"offset": 720, "category": TZ_DST},
+    "NOVT": {"offset": 360, "category": 0},
+    "NZDT": {"offset": 780, "category": TZ_DST},
+    "NZST": {"offset": 720, "category": 0},
+    "OESZ": {"offset": 180, "category": 0},
+    "OMST": {"offset": 360, "category": 0},
+    "ORAT": {"offset": 300, "category": 0},
+    "PDST": {"offset": -420, "category": TZ_DST},
+    "PETT": {"offset": 720, "category": 0},
+    "PHOT": {"offset": 780, "category": 0},
+    "PMDT": {"offset": -120, "category": TZ_DST},
+    "PMST": {"offset": -180, "category": 0},
+    "PONT": {"offset": 660, "category": 0},
+    "PYST": {"offset": 0, "category": TZ_AMBIGUOUS},
+    "QYZT": {"offset": 360, "category": 0},
+    "ROTT": {"offset": -180, "category": 0},
+    "SAKT": {"offset": 600, "category": 0},
+    "SAMT": {"offset": 240, "category": 0},
+    "SAST": {"offset": 120, "category": 0},
+    "SRET": {"offset": 660, "category": 0},
+    "SYOT": {"offset": 180, "category": 0},
+    "TAHT": {"offset": -600, "category": 0},
+    "TOST": {"offset": 840, "category": TZ_DST},
+    "ULAT": {"offset": 480, "category": 0},
+    "UYST": {"offset": -120, "category": TZ_DST},
+    "VLAT": {"offset": 600, "category": 0},
+    "VOST": {"offset": 360, "category": 0},
+    "WAKT": {"offset": 720, "category": 0},
+    "WAST": {"offset": 120, "category": TZ_DST},
+    "WEDT": {"offset": 60, "category": TZ_DST},
+    "WEST": {"offset": 60, "category": TZ_DST},
+    "WESZ": {"offset": 60, "category": 0},
+    "WGST": {"offset": -120, "category": TZ_DST},
+    "WITA": {"offset": 480, "category": 0},
+    "YAKT": {"offset": 540, "category": 0},
+    "YAPT": {"offset": 600, "category": 0},
+    "YEKT": {"offset": 300, "category": 0},
+    "ACWST": {"offset": 525, "category": 0},
+    "ANAST": {"offset": 720, "category": TZ_DST},
+    "AZODT": {"offset": 0, "category": TZ_DST},
+    "AZOST": {"offset": 0, "category": TZ_AMBIGUOUS | TZ_DST},
+    "CHADT": {"offset": 825, "category": TZ_DST},
+    "CHAST": {"offset": 765, "category": 0},
+    "CHODT": {"offset": 540, "category": TZ_DST},
+    "CHOST": {"offset": 540, "category": TZ_DST},
+    "CIDST": {"offset": -240, "category": TZ_DST},
+    "EASST": {"offset": -300, "category": TZ_DST},
+    "EFATE": {"offset": 660, "category": 0},
+    "HOVDT": {"offset": 480, "category": TZ_DST},
+    "HOVST": {"offset": 480, "category": TZ_DST},
+    "IRKST": {"offset": 540, "category": TZ_DST},
+    "KRAST": {"offset": 480, "category": TZ_DST},
+    "MAGST": {"offset": 720, "category": TZ_DST},
+    "NACDT": {"offset": -300, "category": TZ_DST},
+    "NACST": {"offset": -360, "category": 0},
+    "NAEDT": {"offset": -240, "category": TZ_DST},
+    "NAEST": {"offset": -300, "category": 0},
+    "NAMDT": {"offset": -360, "category": TZ_DST},
+    "NAMST": {"offset": -420, "category": 0},
+    "NAPDT": {"offset": -420, "category": TZ_DST},
+    "NAPST": {"offset": -480, "category": 0},
+    "NOVST": {"offset": 420, "category": TZ_DST},
+    "OMSST": {"offset": 420, "category": TZ_DST},
+    "PETST": {"offset": 720, "category": TZ_DST},
+    "SAMST": {"offset": 240, "category": TZ_DST},
+    "ULAST": {"offset": 540, "category": TZ_DST},
+    "VLAST": {"offset": 660, "category": TZ_DST},
+    "WARST": {"offset": -180, "category": TZ_DST},
+    "YAKST": {"offset": 600, "category": TZ_DST},
+    "YEKST": {"offset": 360, "category": TZ_DST},
+    "CHODST": {"offset": 540, "category": TZ_DST},
+    "HOVDST": {"offset": 480, "category": TZ_DST},
 }
diff --git a/tarantool/msgpack_ext/types/timezones/validate_timezones.py b/tarantool/msgpack_ext/types/timezones/validate_timezones.py
deleted file mode 100644
index 943437f8..00000000
--- a/tarantool/msgpack_ext/types/timezones/validate_timezones.py
+++ /dev/null
@@ -1,17 +0,0 @@
-"""
-Script to validate that each Tarantool timezone is either a valid pytz
-timezone or an addreviated timezone with explicit offset provided.
-"""
-
-import pytz
-from timezones import timezoneToIndex, timezoneAbbrevInfo
-
-if __name__ != '__main__':
-    raise Error('Import not expected')
-
-for timezone in timezoneToIndex.keys():
-    if timezone in pytz.all_timezones:
-        continue
-
-    if not timezone in timezoneAbbrevInfo:
-        raise Exception(f'Unknown Tarantool timezone {timezone}')
diff --git a/tarantool/msgpack_ext/unpacker.py b/tarantool/msgpack_ext/unpacker.py
index 6950f485..985653d5 100644
--- a/tarantool/msgpack_ext/unpacker.py
+++ b/tarantool/msgpack_ext/unpacker.py
@@ -3,6 +3,7 @@
 
 .. _extension: https://www.tarantool.io/en/doc/latest/dev_guide/internals/msgpack_extensions/
 """
+# pylint: disable=duplicate-code
 
 import tarantool.msgpack_ext.decimal as ext_decimal
 import tarantool.msgpack_ext.uuid as ext_uuid
@@ -11,13 +12,14 @@
 import tarantool.msgpack_ext.interval as ext_interval
 
 decoders = {
-    ext_decimal.EXT_ID : ext_decimal.decode ,
-    ext_uuid.EXT_ID    : ext_uuid.decode    ,
-    ext_error.EXT_ID   : ext_error.decode   ,
+    ext_decimal.EXT_ID: ext_decimal.decode,
+    ext_uuid.EXT_ID: ext_uuid.decode,
+    ext_error.EXT_ID: ext_error.decode,
     ext_datetime.EXT_ID: ext_datetime.decode,
     ext_interval.EXT_ID: ext_interval.decode,
 }
 
+
 def ext_hook(code, data, unpacker=None):
     """
     :class:`msgpack.Unpacker` decoder.
@@ -42,4 +44,4 @@ def ext_hook(code, data, unpacker=None):
 
     if code in decoders:
         return decoders[code](data, unpacker)
-    raise NotImplementedError("Unknown msgpack extension type code %d" % (code,))
+    raise NotImplementedError(f"Unknown msgpack extension type code {code}")
diff --git a/tarantool/msgpack_ext/uuid.py b/tarantool/msgpack_ext/uuid.py
index 91b4ac94..859d096c 100644
--- a/tarantool/msgpack_ext/uuid.py
+++ b/tarantool/msgpack_ext/uuid.py
@@ -20,6 +20,7 @@
 `uuid`_ type id.
 """
 
+
 def encode(obj, _):
     """
     Encode an UUID object.
@@ -33,6 +34,7 @@ def encode(obj, _):
 
     return obj.bytes
 
+
 def decode(data, _):
     """
     Decode an UUID object.
diff --git a/tarantool/request.py b/tarantool/request.py
index f6f6dfcb..95164b79 100644
--- a/tarantool/request.py
+++ b/tarantool/request.py
@@ -1,17 +1,13 @@
-# pylint: disable=C0301,W0105,W0401,W0614
 """
 Request types definitions. For internal use only, there is no API to
 send pre-build request objects.
 """
 
-import sys
-import msgpack
 import hashlib
-
 from collections.abc import Sequence, Mapping
 
+import msgpack
 
-from tarantool.error import DatabaseError
 from tarantool.const import (
     IPROTO_REQUEST_TYPE,
     IPROTO_SYNC,
@@ -24,12 +20,8 @@
     IPROTO_TUPLE,
     IPROTO_FUNCTION_NAME,
     IPROTO_ITERATOR,
-    IPROTO_SERVER_UUID,
-    IPROTO_CLUSTER_UUID,
-    IPROTO_VCLOCK,
     IPROTO_EXPR,
     IPROTO_OPS,
-    # IPROTO_INDEX_BASE,
     IPROTO_SCHEMA_ID,
     IPROTO_SQL_TEXT,
     IPROTO_SQL_BIND,
@@ -48,8 +40,6 @@
     REQUEST_TYPE_EXECUTE,
     REQUEST_TYPE_EVAL,
     REQUEST_TYPE_AUTHENTICATE,
-    REQUEST_TYPE_JOIN,
-    REQUEST_TYPE_SUBSCRIBE,
     REQUEST_TYPE_ID,
     AUTH_TYPE_CHAP_SHA1,
     AUTH_TYPE_PAP_SHA256,
@@ -65,6 +55,7 @@
 
 from tarantool.msgpack_ext.packer import default as packer_default
 
+
 def packer_factory(conn):
     """
     Build packer to pack request.
@@ -75,7 +66,7 @@ def packer_factory(conn):
     :rtype: :class:`msgpack.Packer`
     """
 
-    packer_kwargs = dict()
+    packer_kwargs = {}
 
     # use_bin_type=True is default since msgpack-1.0.0.
     #
@@ -116,17 +107,18 @@ def packer_factory(conn):
     else:
         packer_kwargs['use_bin_type'] = True
 
-    # We need configured packer to work with error extention
+    # We need configured packer to work with error extension
     # type payload, but module do not provide access to self
     # inside extension type packers.
-    packer_no_ext = msgpack.Packer(**packer_kwargs)
-    default = lambda obj: packer_default(obj, packer_no_ext)
+    def default(obj):
+        packer_no_ext = msgpack.Packer(**packer_kwargs)
+        return packer_default(obj, packer_no_ext)
     packer_kwargs['default'] = default
 
     return msgpack.Packer(**packer_kwargs)
 
 
-class Request(object):
+class Request():
     """
     Represents a single request to the server in compliance with the
     Tarantool protocol. Responsible for data encapsulation and building
@@ -188,9 +180,13 @@ def header(self, length):
         """
 
         self._sync = self.conn.generate_sync()
-        header = self._dumps({IPROTO_REQUEST_TYPE: self.request_type,
-                              IPROTO_SYNC: self._sync,
-                              IPROTO_SCHEMA_ID: self.conn.schema_version})
+        header_fields = {
+            IPROTO_REQUEST_TYPE: self.request_type,
+            IPROTO_SYNC: self._sync,
+        }
+        if self.conn.schema is not None:
+            header_fields[IPROTO_SCHEMA_ID] = self.conn.schema_version
+        header = self._dumps(header_fields)
 
         return self._dumps(length + len(header)) + header
 
@@ -202,7 +198,6 @@ class RequestInsert(Request):
 
     request_type = REQUEST_TYPE_INSERT
 
-    # pylint: disable=W0231
     def __init__(self, conn, space_no, values):
         """
         :param conn: Request sender.
@@ -217,7 +212,7 @@ def __init__(self, conn, space_no, values):
         :raise: :exc:`~AssertionError`
         """
 
-        super(RequestInsert, self).__init__(conn)
+        super().__init__(conn)
         assert isinstance(values, (tuple, list))
 
         request_body = self._dumps({IPROTO_SPACE_ID: space_no,
@@ -225,6 +220,7 @@ def __init__(self, conn, space_no, values):
 
         self._body = request_body
 
+
 def sha1(values):
     """
     Compute hash.
@@ -246,6 +242,7 @@ def sha1(values):
                 sha.update(i.encode())
     return sha.digest()
 
+
 class RequestAuthenticate(Request):
     """
     Represents AUTHENTICATE request.
@@ -272,8 +269,9 @@ def __init__(self, conn, salt, user, password, auth_type=AUTH_TYPE_CHAP_SHA1):
         :param auth_type: Refer to :paramref:`~tarantool.Connection.auth_type`.
         :type auth_type: :obj:`str`, optional
         """
+        # pylint: disable=too-many-arguments,too-many-positional-arguments
 
-        super(RequestAuthenticate, self).__init__(conn)
+        super().__init__(conn)
 
         if auth_type == AUTH_TYPE_CHAP_SHA1:
             hash1 = sha1((password,))
@@ -318,7 +316,6 @@ class RequestReplace(Request):
 
     request_type = REQUEST_TYPE_REPLACE
 
-    # pylint: disable=W0231
     def __init__(self, conn, space_no, values):
         """
         :param conn: Request sender.
@@ -333,7 +330,7 @@ def __init__(self, conn, space_no, values):
         :raise: :exc:`~AssertionError`
         """
 
-        super(RequestReplace, self).__init__(conn)
+        super().__init__(conn)
         assert isinstance(values, (tuple, list))
 
         request_body = self._dumps({IPROTO_SPACE_ID: space_no,
@@ -349,7 +346,6 @@ class RequestDelete(Request):
 
     request_type = REQUEST_TYPE_DELETE
 
-    # pylint: disable=W0231
     def __init__(self, conn, space_no, index_no, key):
         """
         :param conn: Request sender.
@@ -367,7 +363,7 @@ def __init__(self, conn, space_no, index_no, key):
         :raise: :exc:`~AssertionError`
         """
 
-        super(RequestDelete, self).__init__(conn)
+        super().__init__(conn)
 
         request_body = self._dumps({IPROTO_SPACE_ID: space_no,
                                     IPROTO_INDEX_ID: index_no,
@@ -383,7 +379,6 @@ class RequestSelect(Request):
 
     request_type = REQUEST_TYPE_SELECT
 
-    # pylint: disable=W0231
     def __init__(self, conn, space_no, index_no, key, offset, limit, iterator):
         """
         :param conn: Request sender.
@@ -410,8 +405,9 @@ def __init__(self, conn, space_no, index_no, key, offset, limit, iterator):
 
         :raise: :exc:`~AssertionError`
         """
+        # pylint: disable=too-many-arguments,too-many-positional-arguments
 
-        super(RequestSelect, self).__init__(conn)
+        super().__init__(conn)
         request_body = self._dumps({IPROTO_SPACE_ID: space_no,
                                     IPROTO_INDEX_ID: index_no,
                                     IPROTO_OFFSET: offset,
@@ -429,7 +425,6 @@ class RequestUpdate(Request):
 
     request_type = REQUEST_TYPE_UPDATE
 
-    # pylint: disable=W0231
     def __init__(self, conn, space_no, index_no, key, op_list):
         """
         :param conn: Request sender.
@@ -451,8 +446,9 @@ def __init__(self, conn, space_no, index_no, key, op_list):
 
         :raise: :exc:`~AssertionError`
         """
+        # pylint: disable=too-many-arguments,too-many-positional-arguments
 
-        super(RequestUpdate, self).__init__(conn)
+        super().__init__(conn)
 
         request_body = self._dumps({IPROTO_SPACE_ID: space_no,
                                     IPROTO_INDEX_ID: index_no,
@@ -469,7 +465,6 @@ class RequestCall(Request):
 
     request_type = REQUEST_TYPE_CALL
 
-    # pylint: disable=W0231
     def __init__(self, conn, name, args, call_16):
         """
         :param conn: Request sender.
@@ -490,7 +485,7 @@ def __init__(self, conn, name, args, call_16):
 
         if call_16:
             self.request_type = REQUEST_TYPE_CALL16
-        super(RequestCall, self).__init__(conn)
+        super().__init__(conn)
         assert isinstance(args, (list, tuple))
 
         request_body = self._dumps({IPROTO_FUNCTION_NAME: name,
@@ -506,7 +501,6 @@ class RequestEval(Request):
 
     request_type = REQUEST_TYPE_EVAL
 
-    # pylint: disable=W0231
     def __init__(self, conn, name, args):
         """
         :param conn: Request sender.
@@ -521,7 +515,7 @@ def __init__(self, conn, name, args):
         :raise: :exc:`~AssertionError`
         """
 
-        super(RequestEval, self).__init__(conn)
+        super().__init__(conn)
         assert isinstance(args, (list, tuple))
 
         request_body = self._dumps({IPROTO_EXPR: name,
@@ -543,7 +537,7 @@ def __init__(self, conn):
         :type conn: :class:`~tarantool.Connection`
         """
 
-        super(RequestPing, self).__init__(conn)
+        super().__init__(conn)
         self._body = b''
 
 
@@ -554,7 +548,6 @@ class RequestUpsert(Request):
 
     request_type = REQUEST_TYPE_UPSERT
 
-    # pylint: disable=W0231
     def __init__(self, conn, space_no, index_no, tuple_value, op_list):
         """
         :param conn: Request sender.
@@ -576,8 +569,9 @@ def __init__(self, conn, space_no, index_no, tuple_value, op_list):
 
         :raise: :exc:`~AssertionError`
         """
+        # pylint: disable=too-many-arguments,too-many-positional-arguments
 
-        super(RequestUpsert, self).__init__(conn)
+        super().__init__(conn)
 
         request_body = self._dumps({IPROTO_SPACE_ID: space_no,
                                     IPROTO_INDEX_ID: index_no,
@@ -587,64 +581,6 @@ def __init__(self, conn, space_no, index_no, tuple_value, op_list):
         self._body = request_body
 
 
-class RequestJoin(Request):
-    """
-    Represents JOIN request.
-    """
-
-    request_type = REQUEST_TYPE_JOIN
-
-    # pylint: disable=W0231
-    def __init__(self, conn, server_uuid):
-        """
-        :param conn: Request sender.
-        :type conn: :class:`~tarantool.Connection`
-
-        :param server_uuid: UUID of connector "server".
-        :type server_uuid: :obj:`str`
-        """
-
-        super(RequestJoin, self).__init__(conn)
-        request_body = self._dumps({IPROTO_SERVER_UUID: server_uuid})
-        self._body = request_body
-
-
-class RequestSubscribe(Request):
-    """
-    Represents SUBSCRIBE request.
-    """
-
-    request_type = REQUEST_TYPE_SUBSCRIBE
-
-    # pylint: disable=W0231
-    def __init__(self, conn, cluster_uuid, server_uuid, vclock):
-        """
-        :param conn: Request sender.
-        :type conn: :class:`~tarantool.Connection`
-
-        :param server_uuid: UUID of connector "server".
-        :type server_uuid: :obj:`str`
-
-        :param server_uuid: UUID of connector "server".
-        :type server_uuid: :obj:`str`
-
-        :param vclock: Connector "server" vclock.
-        :type vclock: :obj:`dict`
-
-        :raise: :exc:`~AssertionError`
-        """
-
-        super(RequestSubscribe, self).__init__(conn)
-        assert isinstance(vclock, dict)
-
-        request_body = self._dumps({
-            IPROTO_CLUSTER_UUID: cluster_uuid,
-            IPROTO_SERVER_UUID: server_uuid,
-            IPROTO_VCLOCK: vclock
-        })
-        self._body = request_body
-
-
 class RequestOK(Request):
     """
     Represents OK acknowledgement.
@@ -652,7 +588,6 @@ class RequestOK(Request):
 
     request_type = REQUEST_TYPE_OK
 
-    # pylint: disable=W0231
     def __init__(self, conn, sync):
         """
         :param conn: Request sender.
@@ -662,7 +597,7 @@ def __init__(self, conn, sync):
         :type sync: :obj:`int`
         """
 
-        super(RequestOK, self).__init__(conn)
+        super().__init__(conn)
         request_body = self._dumps({IPROTO_REQUEST_TYPE: self.request_type,
                                     IPROTO_SYNC: sync})
         self._body = request_body
@@ -689,12 +624,12 @@ def __init__(self, conn, sql, args):
         :raise: :exc:`~TypeError`
         """
 
-        super(RequestExecute, self).__init__(conn)
+        super().__init__(conn)
         if isinstance(args, Mapping):
-            args = [{":%s" % name: value} for name, value in args.items()]
+            args = [{f":{name}": value} for name, value in args.items()]
         elif not isinstance(args, Sequence):
-            raise TypeError("Parameter type '%s' is not supported. "
-                            "Must be a mapping or sequence" % type(args))
+            raise TypeError(f"Parameter type '{type(args)}' is not supported. "
+                            "Must be a mapping or sequence")
 
         request_body = self._dumps({IPROTO_SQL_TEXT: sql,
                                     IPROTO_SQL_BIND: args})
@@ -702,6 +637,7 @@ def __init__(self, conn, sql, args):
         self._body = request_body
         self.response_class = ResponseExecute
 
+
 class RequestProtocolVersion(Request):
     """
     Represents ID request: inform the server about the protocol
@@ -722,7 +658,7 @@ def __init__(self, conn, protocol_version, features):
         :type features: :obj:`list`
         """
 
-        super(RequestProtocolVersion, self).__init__(conn)
+        super().__init__(conn)
 
         request_body = self._dumps({IPROTO_VERSION: protocol_version,
                                     IPROTO_FEATURES: features})
diff --git a/tarantool/response.py b/tarantool/response.py
index ece616d4..0e062c74 100644
--- a/tarantool/response.py
+++ b/tarantool/response.py
@@ -1,4 +1,3 @@
-# pylint: disable=C0301,W0105,W0401,W0614
 """
 Request response types definitions.
 """
@@ -34,6 +33,7 @@
 
 from tarantool.msgpack_ext.unpacker import ext_hook as unpacker_ext_hook
 
+
 def unpacker_factory(conn):
     """
     Build unpacker to unpack request response.
@@ -44,7 +44,7 @@ def unpacker_factory(conn):
     :rtype: :class:`msgpack.Unpacker`
     """
 
-    unpacker_kwargs = dict()
+    unpacker_kwargs = {}
 
     # Decode MsgPack arrays into Python lists by default (not tuples).
     # Can be configured in the Connection init
@@ -68,7 +68,7 @@ def unpacker_factory(conn):
 
     # encoding option is not supported since msgpack-1.0.0,
     # but it is handled in the Connection constructor.
-    assert(msgpack.version < (1, 0, 0) or conn.encoding in (None, 'utf-8'))
+    assert msgpack.version < (1, 0, 0) or conn.encoding in (None, 'utf-8')
 
     # strict_map_key=True is default since msgpack-1.0.0.
     #
@@ -76,11 +76,12 @@ def unpacker_factory(conn):
     if msgpack.version >= (1, 0, 0):
         unpacker_kwargs['strict_map_key'] = False
 
-    # We need configured unpacker to work with error extention
+    # We need configured unpacker to work with error extension
     # type payload, but module do not provide access to self
     # inside extension type unpackers.
-    unpacker_no_ext = msgpack.Unpacker(**unpacker_kwargs)
-    ext_hook = lambda code, data: unpacker_ext_hook(code, data, unpacker_no_ext)
+    def ext_hook(code, data):
+        unpacker_no_ext = msgpack.Unpacker(**unpacker_kwargs)
+        return unpacker_ext_hook(code, data, unpacker_no_ext)
     unpacker_kwargs['ext_hook'] = ext_hook
 
     return msgpack.Unpacker(**unpacker_kwargs)
@@ -93,6 +94,7 @@ class Response(Sequence):
     received list of tuples) and parsing of binary packets received from
     the server.
     """
+    # pylint: disable=too-many-instance-attributes
 
     def __init__(self, conn, response):
         """
@@ -129,8 +131,8 @@ def __init__(self, conn, response):
             self._return_code = 0
             self._schema_version = header.get(IPROTO_SCHEMA_ID, None)
             self._data = self._body.get(IPROTO_DATA, None)
-            if (not isinstance(self._data, (list, tuple)) and
-                    self._data is not None):
+            if (not isinstance(self._data, (list, tuple))
+                    and self._data is not None):
                 self._data = [self._data]
             # # Backward-compatibility
             # if isinstance(self._data, (list, tuple)):
@@ -192,7 +194,7 @@ def index(self, *args):
             raise InterfaceError("Trying to access data when there's no data")
         return self._data.index(*args)
 
-    def count(self, item):
+    def count(self, value):
         """
         Refer to :class:`collections.abc.Sequence`.
 
@@ -201,7 +203,7 @@ def count(self, item):
 
         if self._data is None:
             raise InterfaceError("Trying to access data when there's no data")
-        return self._data.count(item)
+        return self._data.count(value)
 
     @property
     def rowcount(self):
@@ -302,7 +304,7 @@ def __str__(self):
                     'code': self.strerror[0],
                     'reason': self.return_message
                 }
-            }, sort_keys = True, indent = 4, separators=(', ', ': '))
+            }, sort_keys=True, indent=4, separators=(', ', ': '))
         output = []
         for tpl in self._data or ():
             output.extend(("- ", repr(tpl), "\n"))
diff --git a/tarantool/schema.py b/tarantool/schema.py
index d4f13f6b..556737b7 100644
--- a/tarantool/schema.py
+++ b/tarantool/schema.py
@@ -1,32 +1,35 @@
-# pylint: disable=R0903
 """
 Schema types definitions. For internal use only, there is no API to use
 pre-build schema objects.
 """
 
 from tarantool.error import (
-    Error,
     SchemaError,
     DatabaseError
 )
-import tarantool.const as const
-
-
-class RecursionError(Error):
-    """
-    Report the situation when max recursion depth is reached.
+from tarantool.const import (
+    INDEX_SPACE_NAME,
+    INDEX_INDEX_NAME,
+    INDEX_SPACE_PRIMARY,
+    INDEX_INDEX_PRIMARY,
+    SPACE_VSPACE,
+    SPACE_VINDEX,
+    SPACE_SPACE,
+    SPACE_INDEX
+)
 
-    This is an internal error of
-    :func:`~tarantool.schema.to_unicode_recursive` caller and it should
-    be re-raised properly by the caller.
-    """
+MAX_RECURSION_DEPTH = 32
+"""
+Max possible known schema depth is 4 if foreign keys are used (since
+Tarantool 2.10), but there are no restrictions in protocol.
+"""
 
 
-def to_unicode(s):
+def to_unicode(string):
     """
     Decode :obj:`bytes` to unicode :obj:`str`.
 
-    :param s: Value to convert.
+    :param string: Value to convert.
 
     :return: Decoded unicode :obj:`str`, if value is :obj:`bytes`.
         Otherwise, it returns the original value.
@@ -34,17 +37,17 @@ def to_unicode(s):
     :meta private:
     """
 
-    if isinstance(s, bytes):
-        return s.decode(encoding='utf-8')
-    return s
+    if isinstance(string, bytes):
+        return string.decode(encoding='utf-8')
+    return string
 
 
-def to_unicode_recursive(x, max_depth):
+def to_unicode_recursive(value, max_depth):
     """
     Recursively decode :obj:`bytes` to unicode :obj:`str` over
     :obj:`dict`, :obj:`list` and :obj:`tuple`.
 
-    :param x: Value to convert.
+    :param value: Value to convert.
 
     :param max_depth: Maximum depth recursion.
     :type max_depth: :obj:`int`
@@ -52,7 +55,7 @@ def to_unicode_recursive(x, max_depth):
     :return: The same structure where all :obj:`bytes` are replaced
         with unicode :obj:`str`.
 
-    :raise: :exc:`~tarantool.schema.RecursionError`
+    :raise: :exc:`~RecursionError`
 
     :meta private:
     """
@@ -60,30 +63,31 @@ def to_unicode_recursive(x, max_depth):
     if max_depth <= 0:
         raise RecursionError('Max recursion depth is reached')
 
-    if isinstance(x, dict):
-        res = dict()
-        for key, val in x.items():
+    if isinstance(value, dict):
+        res = {}
+        for key, val in value.items():
             key = to_unicode_recursive(key, max_depth - 1)
             val = to_unicode_recursive(val, max_depth - 1)
             res[key] = val
         return res
 
-    if isinstance(x, list) or isinstance(x, tuple):
+    if isinstance(value, (list, tuple)):
         res = []
-        for val in x:
-            val = to_unicode_recursive(val, max_depth - 1)
-            res.append(val)
-        if isinstance(x, tuple):
+        for item in value:
+            item = to_unicode_recursive(item, max_depth - 1)
+            res.append(item)
+        if isinstance(value, tuple):
             return tuple(res)
         return res
 
-    return to_unicode(x)
+    return to_unicode(value)
 
 
-class SchemaIndex(object):
+class SchemaIndex():
     """
     Contains schema for a space index.
     """
+    # pylint: disable=too-few-public-methods
 
     def __init__(self, index_row, space):
         """
@@ -97,16 +101,15 @@ def __init__(self, index_row, space):
         """
 
         self.iid = index_row[1]
-        self.name = index_row[2]
         self.name = to_unicode(index_row[2])
         self.index = index_row[3]
         self.unique = index_row[4]
         self.parts = []
         try:
-            parts_raw = to_unicode_recursive(index_row[5], 3)
-        except RecursionError as e:
-            errmsg = 'Unexpected index parts structure: ' + str(e)
-            raise SchemaError(errmsg)
+            parts_raw = to_unicode_recursive(index_row[5], MAX_RECURSION_DEPTH)
+        except RecursionError as exc:
+            errmsg = 'Unexpected index parts structure: ' + str(exc)
+            raise SchemaError(errmsg) from exc
         if isinstance(parts_raw, (list, tuple)):
             for val in parts_raw:
                 if isinstance(val, dict):
@@ -134,10 +137,11 @@ def flush(self):
             del self.space.indexes[self.name]
 
 
-class SchemaSpace(object):
+class SchemaSpace():
     """
     Contains schema for a space.
     """
+    # pylint: disable=too-few-public-methods
 
     def __init__(self, space_row, schema):
         """
@@ -158,16 +162,16 @@ def __init__(self, space_row, schema):
         self.schema[self.sid] = self
         if self.name:
             self.schema[self.name] = self
-        self.format = dict()
+        self.format = {}
         try:
-            format_raw = to_unicode_recursive(space_row[6], 3)
-        except RecursionError as e:
-            errmsg = 'Unexpected space format structure: ' + str(e)
-            raise SchemaError(errmsg)
+            format_raw = to_unicode_recursive(space_row[6], MAX_RECURSION_DEPTH)
+        except RecursionError as exc:
+            errmsg = 'Unexpected space format structure: ' + str(exc)
+            raise SchemaError(errmsg) from exc
         for part_id, part in enumerate(format_raw):
             part['id'] = part_id
             self.format[part['name']] = part
-            self.format[part_id     ] = part
+            self.format[part_id] = part
 
     def flush(self):
         """
@@ -179,10 +183,11 @@ def flush(self):
             del self.schema[self.name]
 
 
-class Schema(object):
+class Schema():
     """
     Contains Tarantool server spaces schema.
     """
+    # pylint: disable=too-few-public-methods
 
     def __init__(self, con):
         """
@@ -236,10 +241,10 @@ def fetch_space(self, space):
             raise SchemaError(
                 'Some strange output from server: \n' + str(space_row)
             )
-        elif len(space_row) == 0 or not len(space_row[0]):
+        if len(space_row) == 0 or not space_row[0]:
             # We can't find space with this name or id
             temp_name = 'name' if isinstance(space, str) else 'id'
-            errmsg = "There's no space with {1} '{0}'".format(space, temp_name)
+            errmsg = f"There's no space with {temp_name} '{space}'"
             raise SchemaError(errmsg)
 
         space_row = space_row[0]
@@ -262,9 +267,9 @@ def fetch_space_from(self, space):
 
         _index = None
         if isinstance(space, str):
-            _index = const.INDEX_SPACE_NAME
+            _index = INDEX_SPACE_NAME
         else:
-            _index = const.INDEX_SPACE_PRIMARY
+            _index = INDEX_SPACE_PRIMARY
 
         if space is None:
             space = ()
@@ -272,16 +277,16 @@ def fetch_space_from(self, space):
         space_row = None
         try:
             # Try to fetch from '_vspace'
-            space_row = self.con.select(const.SPACE_VSPACE, space,
+            space_row = self.con.select(SPACE_VSPACE, space,
                                         index=_index)
-        except DatabaseError as e:
+        except DatabaseError as exc:
             # if space can't be found, then user is using old version of
             # tarantool, try again with '_space'
-            if e.args[0] != 36:
+            if exc.args[0] != 36:
                 raise
         if space_row is None:
             # Try to fetch from '_space'
-            space_row = self.con.select(const.SPACE_SPACE, space, index=_index)
+            space_row = self.con.select(SPACE_SPACE, space, index=_index)
 
         return space_row
 
@@ -348,12 +353,11 @@ def fetch_index(self, space_object, index):
             raise SchemaError(
                 'Some strange output from server: \n' + str(index_row)
             )
-        elif len(index_row) == 0 or not len(index_row[0]):
+        if len(index_row) == 0 or not index_row[0]:
             # We can't find index with this name or id
             temp_name = 'name' if isinstance(index, str) else 'id'
-            errmsg = ("There's no index with {2} '{0}'"
-                      " in space '{1}'").format(index, space_object.name,
-                                                temp_name)
+            errmsg = (f"There's no index with {temp_name} '{index}'"
+                      f" in space '{space_object.name}'")
             raise SchemaError(errmsg)
 
         index_row = index_row[0]
@@ -392,15 +396,15 @@ def fetch_index_from(self, space, index):
 
         _index = None
         if isinstance(index, str):
-            _index = const.INDEX_INDEX_NAME
+            _index = INDEX_INDEX_NAME
         else:
-            _index = const.INDEX_INDEX_PRIMARY
+            _index = INDEX_INDEX_PRIMARY
 
         _key_tuple = None
         if space is None and index is None:
             _key_tuple = ()
         elif space is not None and index is None:
-            _key_tuple = (space)
+            _key_tuple = (space, )
         elif space is not None and index is not None:
             _key_tuple = (space, index)
         else:
@@ -409,16 +413,16 @@ def fetch_index_from(self, space, index):
         index_row = None
         try:
             # Try to fetch from '_vindex'
-            index_row = self.con.select(const.SPACE_VINDEX, _key_tuple,
+            index_row = self.con.select(SPACE_VINDEX, _key_tuple,
                                         index=_index)
-        except DatabaseError as e:
+        except DatabaseError as exc:
             # if space can't be found, then user is using old version of
             # tarantool, try again with '_index'
-            if e.args[0] != 36:
+            if exc.args[0] != 36:
                 raise
         if index_row is None:
             # Try to fetch from '_index'
-            index_row = self.con.select(const.SPACE_INDEX, _key_tuple,
+            index_row = self.con.select(SPACE_INDEX, _key_tuple,
                                         index=_index)
 
         return index_row
@@ -445,12 +449,10 @@ def get_field(self, space, field):
         _space = self.get_space(space)
         try:
             return _space.format[field]
-        except:
-            tp = 'name' if isinstance(field, str) else 'id'
-            errmsg = "There's no field with {2} '{0}' in space '{1}'".format(
-                    field, _space.name, tp
-            )
-            raise SchemaError(errmsg)
+        except KeyError as exc:
+            kind = 'name' if isinstance(field, str) else 'id'
+            errmsg = f"There's no field with {kind} '{field}' in space '{_space.name}'"
+            raise SchemaError(errmsg) from exc
 
         return field
 
diff --git a/tarantool/space.py b/tarantool/space.py
index 0fa61198..11a3e3ca 100644
--- a/tarantool/space.py
+++ b/tarantool/space.py
@@ -1,11 +1,10 @@
-# pylint: disable=C0301,W0105,W0401,W0614
 """
 Space type definition. It is an object-oriented wrapper for requests to
 a Tarantool server space.
 """
 
 
-class Space(object):
+class Space():
     """
     Object-oriented wrapper for accessing a particular space.
     Encapsulates the identifier of the space and provides a more
diff --git a/tarantool/types.py b/tarantool/types.py
index 5ca86150..d849dcfa 100644
--- a/tarantool/types.py
+++ b/tarantool/types.py
@@ -5,6 +5,7 @@
 import typing
 from dataclasses import dataclass
 
+
 @dataclass
 class BoxError():
     """
@@ -13,6 +14,7 @@ class BoxError():
 
     .. _box.error: https://www.tarantool.io/en/doc/latest/reference/reference_lua/box_error/error/
     """
+    # pylint: disable=too-many-instance-attributes
 
     type: typing.Union[str, bytes]
     """
@@ -76,6 +78,7 @@ class BoxError():
 MP_ERROR_ERRCODE = 0x05
 MP_ERROR_FIELDS = 0x06
 
+
 def decode_box_error(err_map):
     """
     Decode MessagePack map received from Tarantool to `box.error`_
@@ -100,13 +103,14 @@ def decode_box_error(err_map):
             message=item[MP_ERROR_MESSAGE],
             errno=item[MP_ERROR_ERRNO],
             errcode=item[MP_ERROR_ERRCODE],
-            fields=item.get(MP_ERROR_FIELDS), # omitted if empty
+            fields=item.get(MP_ERROR_FIELDS),  # omitted if empty
             prev=prev,
         )
         prev = err
 
     return prev
 
+
 def encode_box_error(err):
     """
     Encode Python `box.error`_ representation to MessagePack map.
@@ -131,7 +135,7 @@ def encode_box_error(err):
             MP_ERROR_ERRCODE: err.errcode,
         }
 
-        if err.fields is not None: # omitted if empty
+        if err.fields is not None:  # omitted if empty
             dict_item[MP_ERROR_FIELDS] = err.fields
 
         stack.append(dict_item)
diff --git a/tarantool/utils.py b/tarantool/utils.py
index e5238707..b7ab436d 100644
--- a/tarantool/utils.py
+++ b/tarantool/utils.py
@@ -1,9 +1,14 @@
-import sys
+"""
+This module provides utility functions for the package.
+"""
+
+from base64 import decodebytes as base64_decode
+from dataclasses import dataclass
+import typing
 import uuid
 
 ENCODING_DEFAULT = "utf-8"
 
-from base64 import decodebytes as base64_decode
 
 def strxor(rhs, lhs):
     """
@@ -20,6 +25,7 @@ def strxor(rhs, lhs):
 
     return bytes([x ^ y for x, y in zip(rhs, lhs)])
 
+
 def wrap_key(*args, first=True, select=False):
     """
     Wrap request key in list, if needed.
@@ -41,7 +47,7 @@ def wrap_key(*args, first=True, select=False):
     if len(args) == 1:
         if isinstance(args[0], (list, tuple)) and first:
             return wrap_key(*args[0], first=False, select=select)
-        elif args[0] is None and select:
+        if args[0] is None and select:
             return []
 
     return list(args)
@@ -65,6 +71,34 @@ def version_id(major, minor, patch):
 
     return (((major << 8) | minor) << 8) | patch
 
+
+@dataclass
+class Greeting():
+    """
+    Connection greeting info.
+    """
+
+    version_id: typing.Optional = 0
+    """
+    :type: :obj:`tuple` or :obj:`list`
+    """
+
+    protocol: typing.Optional[str] = None
+    """
+    :type: :obj:`str`, optional
+    """
+
+    uuid: typing.Optional[str] = None
+    """
+    :type: :obj:`str`, optional
+    """
+
+    salt: typing.Optional[str] = None
+    """
+    :type: :obj:`str`, optional
+    """
+
+
 def greeting_decode(greeting_buf):
     """
     Decode Tarantool server greeting.
@@ -78,12 +112,6 @@ def greeting_decode(greeting_buf):
     :raise: :exc:`~Exception`
     """
 
-    class Greeting:
-        version_id = 0
-        protocol = None
-        uuid = None
-        salt = None
-
     # Tarantool 1.6.6
     # Tarantool 1.6.6-102-g4e9bde2
     # Tarantool 1.6.8 (Binary) 3b151c25-4c4a-4b5d-8042-0f1b3a6f61c3
@@ -92,7 +120,7 @@ class Greeting:
     try:
         (product, _, tail) = greeting_buf[0:63].decode().partition(' ')
         if product.startswith("Tarantool "):
-            raise Exception()
+            raise ValueError()
         # Parse a version string - 1.6.6-83-gc6b2129 or 1.6.7
         (version, _, tail) = tail.partition(' ')
         version = version.split('-')[0].split('.')
@@ -112,9 +140,9 @@ class Greeting:
             # Tarantool < 1.6.7 doesn't add "(Binary)" to greeting
             result.protocol = "Binary"
         elif len(tail.strip()) != 0:
-            raise Exception("x")  # Unsupported greeting
+            raise ValueError("x")  # Unsupported greeting
         result.salt = base64_decode(greeting_buf[64:])[:20]
         return result
-    except Exception as e:
-        print('exx', e)
-        raise ValueError("Invalid greeting: " + str(greeting_buf))
+    except ValueError as exc:
+        print('exx', exc)
+        raise ValueError("Invalid greeting: " + str(greeting_buf)) from exc
diff --git a/test/setup_command.py b/test/setup_command.py
index da0cb6c4..9df5f8cd 100755
--- a/test/setup_command.py
+++ b/test/setup_command.py
@@ -1,30 +1,47 @@
 #!/usr/bin/env python
+"""
+This module describes class implementing `python setup.py test`.
+"""
 
-import os
-import sys
 import unittest
+
 import setuptools
-from distutils.errors import DistutilsError
 
-from glob import glob
+try:
+    from setuptools.errors import BaseError
+except (ModuleNotFoundError, ImportError):
+    # pylint: disable=deprecated-module
+    from distutils.errors import DistutilsError as BaseError
+
+
+class Test(setuptools.Command):
+    """
+    Class implementing `python setup.py test`.
+    """
+    # pylint: disable=bad-option-value,no-self-use
 
-class test(setuptools.Command):
     user_options = []
     description = 'Run tests'
 
     def initialize_options(self):
-        pass
+        """
+        Do nothing. setuptools requires to override this abstract
+        method.
+        """
 
     def finalize_options(self):
-        pass
+        """
+        Do nothing. setuptools requires to override this abstract
+        method.
+        """
 
     def run(self):
-        '''
+        """
         Find all tests in test/tarantool/ and run them
-        '''
+        """
 
         tests = unittest.defaultTestLoader.discover('test', pattern='suites')
         test_runner = unittest.TextTestRunner(verbosity=2)
         result = test_runner.run(tests)
         if not result.wasSuccessful():
-            raise DistutilsError('There are failed tests')
+            raise BaseError('There are failed tests')
diff --git a/test/suites/__init__.py b/test/suites/__init__.py
index c8fa35d7..7d092585 100644
--- a/test/suites/__init__.py
+++ b/test/suites/__init__.py
@@ -1,47 +1,58 @@
+"""
+Module tests entrypoint.
+"""
+
 import os
 import unittest
 
-__tmp = os.getcwd()
-os.chdir(os.path.abspath(os.path.dirname(__file__)))
+from .test_schema import TestSuiteSchemaUnicodeConnection
+from .test_schema import TestSuiteSchemaBinaryConnection
+from .test_dml import TestSuiteRequest
+from .test_protocol import TestSuiteProtocol
+from .test_reconnect import TestSuiteReconnect
+from .test_mesh import TestSuiteMesh
+from .test_pool import TestSuitePool
+from .test_execute import TestSuiteExecute
+from .test_dbapi import TestSuiteDBAPI
+from .test_encoding import TestSuiteEncoding
+from .test_socket_fd import TestSuiteSocketFD
+from .test_ssl import TestSuiteSsl
+from .test_decimal import TestSuiteDecimal
+from .test_uuid import TestSuiteUUID
+from .test_datetime import TestSuiteDatetime
+from .test_interval import TestSuiteInterval
+from .test_package import TestSuitePackage
+from .test_error_ext import TestSuiteErrorExt
+from .test_push import TestSuitePush
+from .test_connection import TestSuiteConnection
+from .test_crud import TestSuiteCrud
+
+test_cases = (TestSuiteSchemaUnicodeConnection,
+              TestSuiteSchemaBinaryConnection,
+              TestSuiteRequest, TestSuiteProtocol, TestSuiteReconnect,
+              TestSuiteMesh, TestSuiteExecute, TestSuiteDBAPI,
+              TestSuiteEncoding, TestSuitePool, TestSuiteSsl,
+              TestSuiteDecimal, TestSuiteUUID, TestSuiteDatetime,
+              TestSuiteInterval, TestSuitePackage, TestSuiteErrorExt,
+              TestSuitePush, TestSuiteConnection, TestSuiteCrud, TestSuiteSocketFD)
 
-from .test_schema import TestSuite_Schema_UnicodeConnection
-from .test_schema import TestSuite_Schema_BinaryConnection
-from .test_dml import TestSuite_Request
-from .test_protocol import TestSuite_Protocol
-from .test_reconnect import TestSuite_Reconnect
-from .test_mesh import TestSuite_Mesh
-from .test_pool import TestSuite_Pool
-from .test_execute import TestSuite_Execute
-from .test_dbapi import TestSuite_DBAPI
-from .test_encoding import TestSuite_Encoding
-from .test_ssl import TestSuite_Ssl
-from .test_decimal import TestSuite_Decimal
-from .test_uuid import TestSuite_UUID
-from .test_datetime import TestSuite_Datetime
-from .test_interval import TestSuite_Interval
-from .test_package import TestSuite_Package
-from .test_error_ext import TestSuite_ErrorExt
-from .test_push import TestSuite_Push
-from .test_connection import TestSuite_Connection
-from .test_crud import TestSuite_Crud
-
-test_cases = (TestSuite_Schema_UnicodeConnection,
-              TestSuite_Schema_BinaryConnection,
-              TestSuite_Request, TestSuite_Protocol, TestSuite_Reconnect,
-              TestSuite_Mesh, TestSuite_Execute, TestSuite_DBAPI,
-              TestSuite_Encoding, TestSuite_Pool, TestSuite_Ssl,
-              TestSuite_Decimal, TestSuite_UUID, TestSuite_Datetime,
-              TestSuite_Interval, TestSuite_ErrorExt, TestSuite_Push,
-              TestSuite_Connection, TestSuite_Crud,)
 
 def load_tests(loader, tests, pattern):
+    """
+    Add suites to test run.
+    """
+    # pylint: disable=unused-argument
+
     suite = unittest.TestSuite()
     for testc in test_cases:
         suite.addTests(loader.loadTestsFromTestCase(testc))
     return suite
 
 
+__tmp = os.getcwd()
+os.chdir(os.path.abspath(os.path.dirname(__file__)))
+
 os.chdir(__tmp)
 
 # Workaround to disable unittest output truncating
-__import__('sys').modules['unittest.util']._MAX_LENGTH = 99999
+__import__('sys').modules['unittest.util']._MAX_LENGTH = 99999  # pylint: disable=protected-access
diff --git a/test/suites/box.lua b/test/suites/box.lua
index f551bd1c..c8110d18 100644
--- a/test/suites/box.lua
+++ b/test/suites/box.lua
@@ -1,11 +1,17 @@
 #!/usr/bin/env tarantool
 
+local is_compat, compat = pcall(require, "compat")
 local os = require('os')
 
 local admin_listen = os.getenv("ADMIN")
 local primary_listen = os.getenv("LISTEN")
 local auth_type = os.getenv("AUTH_TYPE")
 
+local SQL_SEQ_SCAN_DEFAULT = os.getenv("SQL_SEQ_SCAN_DEFAULT")
+if is_compat and SQL_SEQ_SCAN_DEFAULT then
+    compat.sql_seq_scan_default = SQL_SEQ_SCAN_DEFAULT
+end
+
 require('console').listen(admin_listen)
 box.cfg{
     listen       = primary_listen,
@@ -13,3 +19,5 @@ box.cfg{
     pid_file     = "box.pid",
     auth_type    = (auth_type:len() > 0) and auth_type or nil,
 }
+
+rawset(_G, 'ready', true)
diff --git a/test/suites/crud_mock_server.lua b/test/suites/crud_mock_server.lua
new file mode 100644
index 00000000..252059df
--- /dev/null
+++ b/test/suites/crud_mock_server.lua
@@ -0,0 +1,21 @@
+#!/usr/bin/env tarantool
+
+local admin_listen = os.getenv("ADMIN")
+local primary_listen = os.getenv("LISTEN")
+
+require('console').listen(admin_listen)
+box.cfg{
+    listen       = primary_listen,
+    memtx_memory = 0.1 * 1024^3, -- 0.1 GiB
+    pid_file     = "box.pid",
+}
+
+box.schema.user.grant('guest', 'execute', 'universe', nil, {if_not_exists = true})
+
+local function mock_replace()
+    error('Unexpected connection error')
+end
+
+rawset(_G, 'crud', {replace = mock_replace})
+
+rawset(_G, 'ready', true)
diff --git a/test/suites/crud_server.lua b/test/suites/crud_server.lua
index ba6fe82a..f939818a 100644
--- a/test/suites/crud_server.lua
+++ b/test/suites/crud_server.lua
@@ -1,7 +1,66 @@
 #!/usr/bin/env tarantool
 
-local crud = require('crud')
-local vshard = require('vshard')
+local function replicaset_uuid()
+    if box.info().replicaset ~= nil and box.info().replicaset.uuid ~= nil then
+        return box.info().replicaset.uuid
+    end
+
+    return box.info().cluster.uuid
+end
+
+local function configure_crud_instance(primary_listen, crud, vshard)
+    box.schema.create_space(
+    'tester', {
+    format = {
+        {name = 'id', type = 'unsigned'},
+        {name = 'bucket_id', type = 'unsigned'},
+        {name = 'name', type = 'string'},
+    }
+    })
+    box.space.tester:create_index('primary_index', {
+        parts = {
+            {field = 1, type = 'unsigned'},
+        },
+    })
+    box.space.tester:create_index('bucket_id', {
+        parts = {
+            {field = 2, type = 'unsigned'},
+        },
+        unique = false,
+    })
+
+    -- Setup vshard.
+    _G.vshard = vshard
+    box.once('guest', function()
+        box.schema.user.grant('guest', 'super')
+    end)
+    local uri = 'guest@0.0.0.0:' .. primary_listen
+    local cfg = {
+        bucket_count = 300,
+        sharding = {
+            [replicaset_uuid()] = {
+                replicas = {
+                    [box.info().uuid] = {
+                        uri = uri,
+                        name = 'storage',
+                        master = true,
+                    },
+                },
+            },
+        },
+    }
+    vshard.storage.cfg(cfg, box.info().uuid)
+    vshard.router.cfg(cfg)
+    vshard.router.bootstrap()
+
+    -- Initialize crud.
+    crud.init_storage()
+    crud.init_router()
+    crud.cfg{stats = true}
+end
+
+local crud_imported, crud = pcall(require, 'crud')
+local vshard_imported, vshard = pcall(require, 'vshard')
 
 local admin_listen = os.getenv("ADMIN")
 local primary_listen = os.getenv("LISTEN")
@@ -18,51 +77,19 @@ box.schema.user.grant(
     'read,write,execute',
     'universe'
 )
-box.schema.create_space(
- 'tester', {
-  format = {
-    {name = 'id', type = 'unsigned'},
-    {name = 'bucket_id', type = 'unsigned'},
-    {name = 'name', type = 'string'},
-  }
-})
-box.space.tester:create_index('primary_index', {
-    parts = {
-        {field = 1, type = 'unsigned'},
-    },
-})
-box.space.tester:create_index('bucket_id', {
-    parts = {
-        {field = 2, type = 'unsigned'},
-    },
-    unique = false,
-})
 
--- Setup vshard.
-_G.vshard = vshard
-box.once('guest', function()
-    box.schema.user.grant('guest', 'super')
-end)
-local uri = 'guest@0.0.0.0:' .. primary_listen
-local cfg = {
-    bucket_count = 300,
-    sharding = {
-        [box.info().cluster.uuid] = {
-            replicas = {
-                [box.info().uuid] = {
-                    uri = uri,
-                    name = 'storage',
-                    master = true,
-                },
-            },
-        },
-    },
-}
-vshard.storage.cfg(cfg, box.info().uuid)
-vshard.router.cfg(cfg)
-vshard.router.bootstrap()
+if crud_imported == false or vshard_imported == false then
+    -- Set flag for unittest.
+    _G['ROCKS_IMPORT_FAIL'] = true
+    local fail_msg = 'The crud/vshard modules are not detected, ' ..
+                     'installation via rocks install is required ' ..
+                     'for CRUD testing purposes. You can use ' ..
+                     '<tarantoolctl rocks install crud> or ' ..
+                     '<tt rocks install crud> to install modules'
+    -- The print output will be captured in the logs.
+    print(fail_msg)
+else
+    configure_crud_instance(primary_listen, crud, vshard)
+end
 
--- Initialize crud.
-crud.init_storage()
-crud.init_router()
-crud.cfg{stats = true}
+rawset(_G, 'ready', true)
diff --git a/test/suites/lib/remote_tarantool_server.py b/test/suites/lib/remote_tarantool_server.py
index 5d6afd77..7d4118ba 100644
--- a/test/suites/lib/remote_tarantool_server.py
+++ b/test/suites/lib/remote_tarantool_server.py
@@ -1,3 +1,8 @@
+"""
+This module provides helpers to work with remote Tarantool server
+(used on Windows).
+"""
+
 import sys
 import os
 import random
@@ -15,10 +20,17 @@
 
 
 def get_random_string():
+    """
+    :type: :obj:`str`
+    """
     return ''.join(random.choice(string.ascii_lowercase) for _ in range(16))
 
 
-class RemoteTarantoolServer(object):
+class RemoteTarantoolServer():
+    """
+    Class to work with remote Tarantool server.
+    """
+
     def __init__(self):
         self.host = os.environ['REMOTE_TARANTOOL_HOST']
 
@@ -26,7 +38,7 @@ def __init__(self):
         self.args['primary'] = BINARY_PORT
         self.args['admin'] = os.environ['REMOTE_TARANTOOL_CONSOLE_PORT']
 
-        assert(self.args['primary'] != self.args['admin'])
+        assert self.args['primary'] != self.args['admin']
 
         # a name to using for a lock
         self.whoami = get_random_string()
@@ -39,54 +51,78 @@ def __init__(self):
         self.admin.execute('box.cfg{listen = box.NULL}')
 
     def acquire_lock(self):
+        """
+        Acquire lock on the remote server so no concurrent tests would run.
+        """
+
         deadline = time.time() + AWAIT_TIME
         while True:
-            res = self.admin.execute('return acquire_lock("%s")' % self.whoami)
+            res = self.admin.execute(f'return acquire_lock("{ self.whoami}")')
             ok = res[0]
             err = res[1] if not ok else None
             if ok:
                 break
             if time.time() > deadline:
-                raise RuntimeError('can not acquire "%s" lock: %s' % (
-                    self.whoami, str(err)))
-            print('waiting to acquire "%s" lock' % self.whoami,
+                raise RuntimeError(f'can not acquire "{self.whoami}" lock: {str(err)}')
+            print(f'waiting to acquire "{self.whoami}" lock',
                   file=sys.stderr)
             time.sleep(1)
         self.lock_is_acquired = True
 
     def touch_lock(self):
-        assert(self.lock_is_acquired)
-        res = self.admin.execute('return touch_lock("%s")' % self.whoami)
+        """
+        Refresh locked state on the remote server so no concurrent
+        tests would run.
+        """
+
+        assert self.lock_is_acquired
+        res = self.admin.execute(f'return touch_lock("{self.whoami}")')
         ok = res[0]
         err = res[1] if not ok else None
         if not ok:
-            raise RuntimeError('can not update "%s" lock: %s' % (
-                self.whoami, str(err)))
+            raise RuntimeError(f'can not update "{self.whoami}" lock: {str(err)}')
 
     def release_lock(self):
-        res = self.admin.execute('return release_lock("%s")' % self.whoami)
+        """
+        Release loack so another test suite can run on the remote
+        server.
+        """
+
+        res = self.admin.execute(f'return release_lock("{self.whoami}")')
         ok = res[0]
         err = res[1] if not ok else None
         if not ok:
-            raise RuntimeError('can not release "%s" lock: %s' % (
-                self.whoami, str(err)))
+            raise RuntimeError(f'can not release "{self.whoami}" lock: {str(err)}')
         self.lock_is_acquired = False
 
     def start(self):
+        """
+        Initialize the work with the remote server.
+        """
+
         if not self.lock_is_acquired:
             self.acquire_lock()
-        self.admin.execute('box.cfg{listen = "0.0.0.0:%s"}' %
-                           self.args['primary'])
+        self.admin.execute(f'box.cfg{{listen = "0.0.0.0:{self.args["primary"]}"}}')
 
     def stop(self):
+        """
+        Finish the work with the remote server.
+        """
+
         self.admin.execute('box.cfg{listen = box.NULL}')
         self.release_lock()
 
     def is_started(self):
+        """
+        Check if we still work with the remote server.
+        """
+
         return self.lock_is_acquired
 
     def clean(self):
-        pass
+        """
+        Do nothing.
+        """
 
     def __del__(self):
         self.admin.disconnect()
diff --git a/test/suites/lib/skip.py b/test/suites/lib/skip.py
index 5cc40d65..625caf6a 100644
--- a/test/suites/lib/skip.py
+++ b/test/suites/lib/skip.py
@@ -1,10 +1,16 @@
+"""
+This module provides helpers to skip specific tests.
+"""
+
 import functools
-import pkg_resources
-import re
 import sys
 
+import pkg_resources
+
+
 def fetch_tarantool_version(self):
-    """Helper to fetch current Tarantool version.
+    """
+    Helper to fetch current Tarantool version.
     """
     if not hasattr(self, 'tnt_version') or self.tnt_version is None:
         srv = None
@@ -19,11 +25,13 @@ def fetch_tarantool_version(self):
 
         try:
             self.tnt_version = srv.admin.tnt_version
-        except:
+        except AttributeError:
             self.__class__.tnt_version = srv.admin.tnt_version
 
-def skip_or_run_test_tarantool_impl(self, REQUIRED_TNT_VERSION, msg):
-    """Helper to skip or run tests depending on the Tarantool
+
+def skip_or_run_test_tarantool_impl(self, required_tt_version, msg):
+    """
+    Helper to skip or run tests depending on the Tarantool
     version.
 
     Also, it can be used with the 'setUp' method for skipping
@@ -31,14 +39,15 @@ def skip_or_run_test_tarantool_impl(self, REQUIRED_TNT_VERSION, msg):
     """
     fetch_tarantool_version(self)
 
-    support_version = pkg_resources.parse_version(REQUIRED_TNT_VERSION)
+    support_version = pkg_resources.parse_version(required_tt_version)
 
     if self.tnt_version < support_version:
-        self.skipTest('Tarantool %s %s' % (self.tnt_version, msg))
+        self.skipTest(f'Tarantool {self.tnt_version} {msg}')
 
 
-def skip_or_run_test_tarantool(func, REQUIRED_TNT_VERSION, msg):
-    """Decorator to skip or run tests depending on the tarantool
+def skip_or_run_test_tarantool(func, required_tt_version, msg):
+    """
+    Decorator to skip or run tests depending on the tarantool
     version.
 
     Also, it can be used with the 'setUp' method for skipping
@@ -50,15 +59,17 @@ def wrapper(self, *args, **kwargs):
         if func.__name__ == 'setUp':
             func(self, *args, **kwargs)
 
-        skip_or_run_test_tarantool_impl(self, REQUIRED_TNT_VERSION, msg)
+        skip_or_run_test_tarantool_impl(self, required_tt_version, msg)
 
         if func.__name__ != 'setUp':
             func(self, *args, **kwargs)
 
     return wrapper
 
-def skip_or_run_test_tarantool_call(self, REQUIRED_TNT_VERSION, msg):
-    """Function to skip or run tests depending on the tarantool
+
+def skip_or_run_test_tarantool_call(self, required_tt_version, msg):
+    """
+    Function to skip or run tests depending on the tarantool
     version. Useful in cases when in is inconvenient to work
     with decorators.
 
@@ -66,12 +77,13 @@ def skip_or_run_test_tarantool_call(self, REQUIRED_TNT_VERSION, msg):
     the whole test suite.
     """
 
-    skip_or_run_test_tarantool_impl(self, REQUIRED_TNT_VERSION, msg)
+    skip_or_run_test_tarantool_impl(self, required_tt_version, msg)
 
 
-def skip_or_run_test_pcall_require(func, REQUIRED_TNT_MODULE, msg):
-    """Decorator to skip or run tests depending on tarantool
-    module requre success or fail.
+def skip_or_run_test_pcall_require(func, required_tt_module, msg):
+    """
+    Decorator to skip or run tests depending on tarantool
+    module require success or fail.
 
     Also, it can be used with the 'setUp' method for skipping
     the whole test suite.
@@ -84,17 +96,17 @@ def wrapper(self, *args, **kwargs):
 
         srv = None
 
-        if hasattr(self, 'servers'):
+        if hasattr(self, 'servers') and self.servers:
             srv = self.servers[0]
 
-        if hasattr(self, 'srv'):
+        if hasattr(self, 'srv') and self.srv:
             srv = self.srv
 
         assert srv is not None
 
-        resp = srv.admin("pcall(require, '%s')" % REQUIRED_TNT_MODULE)
+        resp = srv.admin(f"pcall(require, '{required_tt_module}')")
         if not resp[0]:
-            self.skipTest('Tarantool %s' % (msg, ))
+            self.skipTest(f'Tarantool {msg}')
 
         if func.__name__ != 'setUp':
             func(self, *args, **kwargs)
@@ -102,8 +114,9 @@ def wrapper(self, *args, **kwargs):
     return wrapper
 
 
-def skip_or_run_test_python(func, REQUIRED_PYTHON_VERSION, msg):
-    """Decorator to skip or run tests depending on the Python version.
+def skip_or_run_test_python(func, required_python_version, msg):
+    """
+    Decorator to skip or run tests depending on the Python version.
 
     Also, it can be used with the 'setUp' method for skipping
     the whole test suite.
@@ -115,11 +128,11 @@ def wrapper(self, *args, **kwargs):
             func(self, *args, **kwargs)
 
         ver = sys.version_info
-        python_version_str = '%d.%d' % (ver.major, ver.minor)
+        python_version_str = f'{ver.major}.{ver.minor}'
         python_version = pkg_resources.parse_version(python_version_str)
-        support_version = pkg_resources.parse_version(REQUIRED_PYTHON_VERSION)
+        support_version = pkg_resources.parse_version(required_python_version)
         if python_version < support_version:
-            self.skipTest('Python %s connector %s' % (python_version, msg))
+            self.skipTest(f'Python {python_version} connector {msg}')
 
         if func.__name__ != 'setUp':
             func(self, *args, **kwargs)
@@ -128,7 +141,8 @@ def wrapper(self, *args, **kwargs):
 
 
 def skip_or_run_sql_test(func):
-    """Decorator to skip or run SQL-related tests depending on the
+    """
+    Decorator to skip or run SQL-related tests depending on the
     tarantool version.
 
     Tarantool supports SQL-related stuff only since 2.0.0 version.
@@ -140,7 +154,8 @@ def skip_or_run_sql_test(func):
 
 
 def skip_or_run_varbinary_test(func):
-    """Decorator to skip or run VARBINARY-related tests depending on
+    """
+    Decorator to skip or run VARBINARY-related tests depending on
     the tarantool version.
 
     Tarantool supports VARBINARY type only since 2.2.1 version.
@@ -152,7 +167,8 @@ def skip_or_run_varbinary_test(func):
 
 
 def skip_or_run_decimal_test(func):
-    """Decorator to skip or run decimal-related tests depending on
+    """
+    Decorator to skip or run decimal-related tests depending on
     the tarantool version.
 
     Tarantool supports decimal type only since 2.2.1 version.
@@ -160,10 +176,12 @@ def skip_or_run_decimal_test(func):
     """
 
     return skip_or_run_test_pcall_require(func, 'decimal',
-                                      'does not support decimal type')
+                                          'does not support decimal type')
+
 
-def skip_or_run_UUID_test(func):
-    """Decorator to skip or run UUID-related tests depending on
+def skip_or_run_uuid_test(func):
+    """
+    Decorator to skip or run UUID-related tests depending on
     the tarantool version.
 
     Tarantool supports UUID type only since 2.4.1 version.
@@ -173,8 +191,10 @@ def skip_or_run_UUID_test(func):
     return skip_or_run_test_tarantool(func, '2.4.1',
                                       'does not support UUID type')
 
+
 def skip_or_run_datetime_test(func):
-    """Decorator to skip or run datetime-related tests depending on
+    """
+    Decorator to skip or run datetime-related tests depending on
     the tarantool version.
 
     Tarantool supports datetime type only since 2.10.0 version.
@@ -182,10 +202,25 @@ def skip_or_run_datetime_test(func):
     """
 
     return skip_or_run_test_pcall_require(func, 'datetime',
-                                      'does not support datetime type')
+                                          'does not support datetime type')
+
+
+def skip_or_run_datetime_2_11_test(func):
+    """
+    Decorator to skip or run tests related to datetime module with
+    fixes introduced in 2.11 release.
+
+    See https://github.com/tarantool/tarantool/issues/7698 and
+    https://github.com/tarantool/tarantool/issues/7700
+    """
+
+    return skip_or_run_test_tarantool(func, '2.11.0',
+                                      'does not provide required datetime fixes')
+
 
 def skip_or_run_error_extra_info_test(func):
-    """Decorator to skip or run tests related to extra error info
+    """
+    Decorator to skip or run tests related to extra error info
     provided over iproto depending on the tarantool version.
 
     Tarantool provides extra error info only since 2.4.1 version.
@@ -195,8 +230,10 @@ def skip_or_run_error_extra_info_test(func):
     return skip_or_run_test_tarantool(func, '2.4.1',
                                       'does not provide extra error info')
 
+
 def skip_or_run_error_ext_type_test(func):
-    """Decorator to skip or run tests related to error extension
+    """
+    Decorator to skip or run tests related to error extension
     type depending on the tarantool version.
 
     Tarantool supports error extension type only since 2.4.1 version,
@@ -208,8 +245,10 @@ def skip_or_run_error_ext_type_test(func):
     return skip_or_run_test_tarantool(func, '2.10.0',
                                       'does not support error extension type')
 
+
 def skip_or_run_ssl_password_test_call(self):
-    """Function to skip or run tests related to SSL password
+    """
+    Function to skip or run tests related to SSL password
     and SSL password files support. Supported only in Tarantool EE.
     Do not check Enterprise prefix since TNT_SSL_TEST already assumes
     it.
@@ -222,8 +261,10 @@ def skip_or_run_ssl_password_test_call(self):
     return skip_or_run_test_tarantool_call(self, '2.11.0',
                                            'does not support SSL passwords')
 
+
 def skip_or_run_auth_type_test_call(self):
-    """Function to skip or run tests related to configuring
+    """
+    Function to skip or run tests related to configuring
     authentication method.
 
     Tarantool supports auth_type only in current master since
@@ -236,3 +277,43 @@ def skip_or_run_auth_type_test_call(self):
 
     return skip_or_run_test_tarantool_call(self, '2.11.0',
                                            'does not support auth type')
+
+
+def skip_or_run_constraints_test(func):
+    """
+    Decorator to skip or run tests related to spaces with
+    schema constraints.
+
+    Tarantool supports schema constraints only since 2.10.0 version.
+    See https://github.com/tarantool/tarantool/issues/6436
+    """
+
+    return skip_or_run_test_tarantool(func, '2.10.0',
+                                      'does not support schema constraints')
+
+
+def skip_or_run_iproto_basic_features_test(func):
+    """
+    Decorator to skip or run tests related to iproto ID requests,
+    protocol version and features.
+
+    Tarantool supports iproto ID requests only since 2.10.0 version.
+    Protocol version is 3 for Tarantool 2.10.0,
+    IPROTO_FEATURE_STREAMS, IPROTO_FEATURE_TRANSACTIONS
+    and IPROTO_FEATURE_ERROR_EXTENSION are supported in Tarantool 2.10.0.
+    See https://github.com/tarantool/tarantool/issues/6253
+    """
+
+    return skip_or_run_test_tarantool(func, '2.10.0',
+                                      'does not support iproto ID and iproto basic features')
+
+
+def skip_or_run_box_session_new_tests(func):
+    """
+    Decorator to skip or run tests that use box.session.new.
+
+    Tarantool supports box.session.new only in current master since
+    commit 324872a.
+    See https://github.com/tarantool/tarantool/issues/8801.
+    """
+    return skip_or_run_test_tarantool(func, '3.0.0', 'does not support box.session.new')
diff --git a/test/suites/lib/tarantool_admin.py b/test/suites/lib/tarantool_admin.py
index 33a6d61f..de75a0e2 100644
--- a/test/suites/lib/tarantool_admin.py
+++ b/test/suites/lib/tarantool_admin.py
@@ -1,10 +1,19 @@
+"""
+This module provides helpers to setup running Tarantool server.
+"""
+
 import socket
-import yaml
 import re
+
 import pkg_resources
+import yaml
+
 
+class TarantoolAdmin():
+    """
+    Class to setup running Tarantool server.
+    """
 
-class TarantoolAdmin(object):
     def __init__(self, host, port):
         self.host = host
         self.port = port
@@ -13,18 +22,30 @@ def __init__(self, host, port):
         self._tnt_version = None
 
     def connect(self):
+        """
+        Connect to running Tarantool server.
+        """
+
         self.socket = socket.create_connection((self.host, self.port))
         self.socket.setsockopt(socket.SOL_TCP, socket.TCP_NODELAY, 1)
         self.is_connected = True
         self.socket.recv(256)  # skip greeting
 
     def disconnect(self):
+        """
+        Disconnect from the Tarantool server.
+        """
+
         if self.is_connected:
             self.socket.close()
             self.socket = None
             self.is_connected = False
 
     def reconnect(self):
+        """
+        Reconnect to the running Tarantool server.
+        """
+
         self.disconnect()
         self.connect()
 
@@ -32,15 +53,19 @@ def __enter__(self):
         self.connect()
         return self
 
-    def __exit__(self, type, value, tb):
+    def __exit__(self, exception_type, exception_value, exception_traceback):
         self.disconnect()
 
     def __call__(self, command):
         return self.execute(command)
 
     def execute(self, command):
+        """
+        Evaluate some Lua code on the Tarantool server.
+        """
+
         if not command:
-            return
+            return None
 
         if not self.is_connected:
             self.connect()
@@ -68,6 +93,10 @@ def execute(self, command):
 
     @property
     def tnt_version(self):
+        """
+        Connected Tarantool server version.
+        """
+
         if self._tnt_version is not None:
             return self._tnt_version
 
diff --git a/test/suites/lib/tarantool_server.py b/test/suites/lib/tarantool_server.py
index ceecb5a7..55f6ca63 100644
--- a/test/suites/lib/tarantool_server.py
+++ b/test/suites/lib/tarantool_server.py
@@ -1,3 +1,7 @@
+"""
+This module provides helpers start up a Tarantool server.
+"""
+
 import os
 import os.path
 import errno
@@ -10,14 +14,19 @@
 import shutil
 import subprocess
 
-from .tarantool_admin import TarantoolAdmin
-
 from tarantool.const import (
     SSL_TRANSPORT
 )
 
+from .tarantool_admin import TarantoolAdmin
+from .remote_tarantool_server import RemoteTarantoolServer
+
 
 def check_port(port, rais=True):
+    """
+    Check if port is free.
+    """
+
     try:
         sock = socket.create_connection(("0.0.0.0", port))
     except socket.error:
@@ -25,11 +34,15 @@ def check_port(port, rais=True):
     sock.close()
 
     if rais:
-        raise RuntimeError("The server is already running on port {0}".format(port))
+        raise RuntimeError(f"The server is already running on port {port}")
     return False
 
 
 def find_port(port=None):
+    """
+    Pick some free socket.
+    """
+
     if port is None:
         port = random.randrange(3300, 9999)
     while port < 9999:
@@ -39,44 +52,70 @@ def find_port(port=None):
     return find_port(3300)
 
 
-class RunnerException(object):
-    pass
-
+class TarantoolServer():
+    """
+    Class to start up a new Tarantool server.
+    """
+    # pylint: disable=too-many-instance-attributes,too-many-arguments,duplicate-code,too-many-positional-arguments
 
-class TarantoolServer(object):
     default_tarantool = {
-            "bin":     "tarantool",
-            "logfile": "tarantool.log",
-            "init":    "init.lua"}
+        "bin": "tarantool",
+        "logfile": "tarantool.log",
+        "init": "init.lua"}
 
     default_cfg = {
-            "custom_proc_title": "\"tarantool-python testing\"",
-            "memtx_memory":      0.5 * 1024**3,  # 0.5 GiB
-            "pid_file":          "\"box.pid\""}
+        "custom_proc_title": "\"tarantool-python testing\"",
+        "memtx_memory": 0.5 * 1024**3,  # 0.5 GiB
+        "pid_file": "\"box.pid\""}
 
     @property
     def logfile_path(self):
+        """
+        Path to server logs.
+        """
+
         return os.path.join(self.vardir, self.default_tarantool['logfile'])
 
     @property
     def cfgfile_path(self):
+        """
+        Path to server configuration.
+        """
+
         return os.path.join(self.vardir, self.default_tarantool['config'])
 
     @property
     def script_path(self):
+        """
+        Path to server init.lua script.
+        """
+
         return os.path.join(self.vardir, self.default_tarantool['init'])
 
     @property
     def script_dst(self):
+        """
+        Path to server init.lua folder.
+        """
+
         return os.path.join(self.vardir, os.path.basename(self.script))
 
     @property
     def script(self):
-        if not hasattr(self, '_script'): self._script = None
+        """
+        Get server init.lua script.
+        """
+
+        if not hasattr(self, '_script'):
+            self._script = None
         return self._script
 
     @script.setter
     def script(self, val):
+        """
+        Set server init.lua script.
+        """
+
         if val is None:
             if hasattr(self, '_script'):
                 delattr(self, '_script')
@@ -85,39 +124,61 @@ def script(self, val):
 
     @property
     def binary(self):
-        if not hasattr(self, '_binary'):
+        """
+        Get Tarantool binary used to start the server.
+        """
+
+        if self._binary is None:
             self._binary = self.find_exe()
         return self._binary
 
     @property
     def _admin(self):
+        """
+        Get admin connection used to set up the server.
+        """
+
         if not hasattr(self, 'admin'):
             self.admin = None
         return self.admin
 
     @_admin.setter
     def _admin(self, port):
+        """
+        Set admin connection used to set up the server.
+        """
+
         try:
             int(port)
-        except ValueError:
-            raise ValueError("Bad port number: '%s'" % port)
+        except ValueError as exc:
+            raise ValueError(f"Bad port number: '{port}'") from exc
         if hasattr(self, 'admin'):
             del self.admin
         self.admin = TarantoolAdmin('0.0.0.0', port)
 
     @property
     def log_des(self):
-        if not hasattr(self, '_log_des'):
-            self._log_des = open(self.logfile_path, 'a')
+        """
+        Get server log file descriptor.
+        """
+        # pylint: disable=consider-using-with
+
+        if self._log_des is None:
+            self._log_des = open(self.logfile_path, 'a', encoding='utf-8')
         return self._log_des
 
     @log_des.deleter
     def log_des(self):
-        if not hasattr(self, '_log_des'):
+        """
+        Set server log file descriptor.
+        """
+
+        if self._log_des is None:
             return
         if not self._log_des.closed:
             self._log_des.close()
-        delattr(self, '_log_des')
+
+        self._log_des = None
 
     def __new__(cls,
                 transport=None,
@@ -128,9 +189,11 @@ def __new__(cls,
                 ssl_password=None,
                 ssl_password_file=None,
                 create_unix_socket=False,
-                auth_type=None):
+                auth_type=None,
+                sql_seq_scan_default=None):
+        # pylint: disable=unused-argument
+
         if os.name == 'nt':
-            from .remote_tarantool_server import RemoteTarantoolServer
             return RemoteTarantoolServer()
         return super(TarantoolServer, cls).__new__(cls)
 
@@ -143,7 +206,10 @@ def __init__(self,
                  ssl_password=None,
                  ssl_password_file=None,
                  create_unix_socket=False,
-                 auth_type=None):
+                 auth_type=None,
+                 sql_seq_scan_default=None):
+        # pylint: disable=consider-using-with
+
         os.popen('ulimit -c unlimited').close()
 
         if create_unix_socket:
@@ -171,8 +237,15 @@ def __init__(self,
         self.ssl_password = ssl_password
         self.ssl_password_file = ssl_password_file
         self.auth_type = auth_type
+        self.sql_seq_scan_default = sql_seq_scan_default
+        self._binary = None
+        self._log_des = None
 
     def find_exe(self):
+        """
+        Find Tarantool executable.
+        """
+
         if 'TARANTOOL_BOX_PATH' in os.environ:
             os.environ["PATH"] = os.environ["TARANTOOL_BOX_PATH"] + os.pathsep + os.environ["PATH"]
 
@@ -183,26 +256,34 @@ def find_exe(self):
         raise RuntimeError("Can't find server executable in " + os.environ["PATH"])
 
     def generate_listen(self, port, port_only):
+        """
+        Generate Tarantool server box.cfg listen.
+        """
+
         if not port_only and self.transport == SSL_TRANSPORT:
             listen = self.host + ":" + str(port) + "?transport=ssl&"
             if self.ssl_key_file:
-                listen += "ssl_key_file={}&".format(self.ssl_key_file)
+                listen += f"ssl_key_file={self.ssl_key_file}&"
             if self.ssl_cert_file:
-                listen += "ssl_cert_file={}&".format(self.ssl_cert_file)
+                listen += f"ssl_cert_file={self.ssl_cert_file}&"
             if self.ssl_ca_file:
-                listen += "ssl_ca_file={}&".format(self.ssl_ca_file)
+                listen += f"ssl_ca_file={self.ssl_ca_file}&"
             if self.ssl_ciphers:
-                listen += "ssl_ciphers={}&".format(self.ssl_ciphers)
+                listen += f"ssl_ciphers={self.ssl_ciphers}&"
             if self.ssl_password:
-                listen += "ssl_password={}&".format(self.ssl_password)
+                listen += f"ssl_password={self.ssl_password}&"
             if self.ssl_password_file:
-                listen += "ssl_password_file={}&".format(self.ssl_password_file)
+                listen += f"ssl_password_file={self.ssl_password_file}&"
             listen = listen[:-1]
         else:
             listen = str(port)
         return listen
 
     def generate_configuration(self):
+        """
+        Generate Tarantool box.cfg values.
+        """
+
         primary_listen = self.generate_listen(self.args['primary'], False)
         admin_listen = self.generate_listen(self.args['admin'], True)
         os.putenv("LISTEN", primary_listen)
@@ -211,68 +292,86 @@ def generate_configuration(self):
             os.putenv("AUTH_TYPE", self.auth_type)
         else:
             os.putenv("AUTH_TYPE", "")
+        if self.sql_seq_scan_default is not None:
+            os.putenv("SQL_SEQ_SCAN_DEFAULT", self.sql_seq_scan_default)
 
     def prepare_args(self):
+        """
+        Prepare Tarantool server init.lua script.
+        """
+
         return shlex.split(self.binary if not self.script else self.script_dst)
 
-    def wait_until_started(self):
-        """ Wait until server is started.
+    def wait_until_ready(self):
+        """
+        Wait until server is configured and ready to work.
 
         Server consists of two parts:
         1) wait until server is listening on sockets
-        2) wait until server tells us his status
+        2) wait until server finishes executing its script
         """
 
         while True:
             try:
                 temp = TarantoolAdmin('0.0.0.0', self.args['admin'])
-                while True:
-                    ans = temp('box.info.status')[0]
-                    if ans in ('running', 'hot_standby', 'orphan') or ans.startswith('replica'):
-                        temp.disconnect()
-                        return True
-                    elif ans in ('loading',):
-                        continue
-                    else:
-                        raise Exception("Strange output for `box.info.status`: %s" % (ans))
-            except socket.error as e:
-                if e.errno == errno.ECONNREFUSED:
+                ans = temp('ready')[0]
+                temp.disconnect()
+                if isinstance(ans, bool) and ans:
+                    return True
+            except socket.error as exc:
+                if exc.errno == errno.ECONNREFUSED:
                     time.sleep(0.1)
                     continue
                 raise
 
     def start(self):
-        # Main steps for running Tarantool\Box
-        # * Find binary file          --DONE(find_exe -> binary)
-        # * Create vardir             --DONE(__init__)
-        # * Generate cfgfile          --DONE(generate_configuration)
-        # * (MAYBE) Copy init.lua     --INSIDE
-        # * Concatenate arguments and
-        #   start Tarantool\Box       --DONE(prepare_args)
-        # * Wait unitl Tarantool\Box
-        #   started                   --DONE(wait_until_started)
+        """
+        Main steps for running Tarantool\\Box
+        * Find binary file          --DONE(find_exe -> binary)
+        * Create vardir             --DONE(__init__)
+        * Generate cfgfile          --DONE(generate_configuration)
+        * (MAYBE) Copy init.lua     --INSIDE
+        * Concatenate arguments and
+          start Tarantool\\Box       --DONE(prepare_args)
+        * Wait until Tarantool\\Box
+          started                   --DONE(wait_until_started)
+        """
+        # pylint: disable=consider-using-with
+
         self.generate_configuration()
         if self.script:
             shutil.copy(self.script, self.script_dst)
             os.chmod(self.script_dst, 0o777)
         args = self.prepare_args()
         self.process = subprocess.Popen(args,
-                cwd=self.vardir,
-                stdout=self.log_des,
-                stderr=self.log_des)
-        self.wait_until_started()
+                                        cwd=self.vardir,
+                                        stdout=self.log_des,
+                                        stderr=self.log_des)
+        self.wait_until_ready()
 
     def stop(self):
+        """
+        Stop Tarantool server.
+        """
+
         self.admin.disconnect()
         if self.process.poll() is None:
             self.process.terminate()
             self.process.wait()
 
     def restart(self):
+        """
+        Restart Tarantool server.
+        """
+
         self.stop()
         self.start()
 
     def clean(self):
+        """
+        Clean Tarantool resources.
+        """
+
         if os.path.isdir(self.vardir):
             shutil.rmtree(self.vardir)
 
@@ -289,9 +388,14 @@ def __del__(self):
         self.clean()
 
     def touch_lock(self):
-        # A stub method to be compatible with
-        # RemoteTarantoolServer.
-        pass
+        """
+        A stub method to be compatible with
+        RemoteTarantoolServer.
+        """
 
     def is_started(self):
+        """
+        Is Tarantool server has need started.
+        """
+
         return self.process is not None
diff --git a/test/suites/sidecar.py b/test/suites/sidecar.py
new file mode 100644
index 00000000..6bee5af7
--- /dev/null
+++ b/test/suites/sidecar.py
@@ -0,0 +1,16 @@
+# pylint: disable=missing-module-docstring
+import os
+
+import tarantool
+
+socket_fd = int(os.environ["SOCKET_FD"])
+
+conn = tarantool.connect(None, None, socket_fd=socket_fd)
+
+# Check user.
+assert conn.eval("return box.session.user()").data[0] == "test"
+
+# Check db operations.
+conn.insert("test", [1])
+conn.insert("test", [2])
+assert conn.select("test").data == [[1], [2]]
diff --git a/test/suites/test_connection.py b/test/suites/test_connection.py
index 4132d35e..4402f0b0 100644
--- a/test/suites/test_connection.py
+++ b/test/suites/test_connection.py
@@ -1,7 +1,13 @@
+"""
+This module tests basic connection behavior.
+"""
+# pylint: disable=missing-class-docstring,missing-function-docstring,duplicate-code
+
 import sys
 import unittest
-
 import decimal
+
+import pkg_resources
 import msgpack
 
 import tarantool
@@ -9,46 +15,62 @@
 
 from .lib.skip import skip_or_run_decimal_test, skip_or_run_varbinary_test
 from .lib.tarantool_server import TarantoolServer
+from .utils import assert_admin_success
 
-class TestSuite_Connection(unittest.TestCase):
+
+class TestSuiteConnection(unittest.TestCase):
     @classmethod
-    def setUpClass(self):
+    def setUpClass(cls):
         print(' CONNECTION '.center(70, '='), file=sys.stderr)
         print('-' * 70, file=sys.stderr)
-        self.srv = TarantoolServer()
-        self.srv.script = 'test/suites/box.lua'
-        self.srv.start()
+        cls.srv = TarantoolServer()
+        cls.srv.script = 'test/suites/box.lua'
+        cls.srv.start()
 
-        self.adm = self.srv.admin
-        self.adm(r"""
+        cls.adm = cls.srv.admin
+        resp = cls.adm("""
             box.schema.user.create('test', {password = 'test', if_not_exists = true})
-            box.schema.user.grant('test', 'read,write,execute', 'universe')
-
-            box.schema.create_space('space_varbin')
-
-            box.space['space_varbin']:format({
-                {
-                    'id',
-                    type = 'number',
-                    is_nullable = false
-                },
-                {
-                    'varbin',
-                    type = 'varbinary',
-                    is_nullable = false,
-                }
-            })
-
-            box.space['space_varbin']:create_index('id', {
-                type = 'tree',
-                parts = {1, 'number'},
-                unique = true})
-
-            box.space['space_varbin']:create_index('varbin', {
-                type = 'tree',
-                parts = {2, 'varbinary'},
-                unique = true})
+            box.schema.user.grant('test', 'read,write,execute', 'universe',
+                                  nil, {if_not_exists = true})
+
+            return true
         """)
+        assert_admin_success(resp)
+
+        if cls.srv.admin.tnt_version >= pkg_resources.parse_version('2.2.1'):
+            resp = cls.adm("""
+                box.schema.create_space('space_varbin', {if_not_exists = true})
+
+                box.space['space_varbin']:format({
+                    {
+                        'id',
+                        type = 'number',
+                        is_nullable = false
+                    },
+                    {
+                        'varbin',
+                        type = 'varbinary',
+                        is_nullable = false,
+                    }
+                })
+
+                box.space['space_varbin']:create_index('id', {
+                    type = 'tree',
+                    parts = {1, 'number'},
+                    unique = true,
+                    if_not_exists = true})
+
+                box.space['space_varbin']:create_index('varbin', {
+                    type = 'tree',
+                    parts = {2, 'varbinary'},
+                    unique = true,
+                    if_not_exists = true})
+
+                return true
+            """)
+            assert_admin_success(resp)
+
+        cls.con = None
 
     def setUp(self):
         # prevent a remote tarantool from clean our session
@@ -61,7 +83,7 @@ def my_ext_type_encoder(obj):
             if isinstance(obj, decimal.Decimal):
                 obj = obj + 1
                 return msgpack.ExtType(ext_decimal.EXT_ID, ext_decimal.encode(obj, None))
-            raise TypeError("Unknown type: %r" % (obj,))
+            raise TypeError(f"Unknown type: {repr(obj)}")
 
         def my_packer_factory(_):
             return msgpack.Packer(default=my_ext_type_encoder)
@@ -92,14 +114,13 @@ def test_custom_unpacker(self):
         def my_ext_type_decoder(code, data):
             if code == ext_decimal.EXT_ID:
                 return ext_decimal.decode(data, None) - 1
-            raise NotImplementedError("Unknown msgpack extension type code %d" % (code,))
+            raise NotImplementedError(f"Unknown msgpack extension type code {code}")
 
         def my_unpacker_factory(_):
             if msgpack.version >= (1, 0, 0):
                 return msgpack.Unpacker(ext_hook=my_ext_type_decoder, strict_map_key=False)
             return msgpack.Unpacker(ext_hook=my_ext_type_decoder)
 
-
         self.con = tarantool.Connection(self.srv.host, self.srv.args['primary'],
                                         user='test', password='test',
                                         unpacker_factory=my_unpacker_factory)
@@ -127,13 +148,13 @@ def my_unpacker_factory(_):
         data = bytes(bytearray.fromhex(data_hex))
         space = 'space_varbin'
 
-        self.con.execute("""
-            INSERT INTO "%s" VALUES (%d, x'%s');
-        """ % (space, data_id, data_hex))
+        self.con.execute(f"""
+            INSERT INTO "{space}" VALUES ({data_id}, x'{data_hex}');
+        """)
 
-        resp = self.con.execute("""
-            SELECT * FROM "%s" WHERE "varbin" == x'%s';
-        """ % (space, data_hex))
+        resp = self.con.execute(f"""
+            SELECT * FROM "{space}" WHERE "varbin" == x'{data_hex}';
+        """)
         self.assertSequenceEqual(resp, [[data_id, data]])
 
     def test_custom_unpacker_supersedes_use_list(self):
@@ -150,12 +171,11 @@ def my_unpacker_factory(_):
         resp = self.con.eval("return {1, 2, 3}")
         self.assertIsInstance(resp[0], tuple)
 
-    @classmethod
     def tearDown(self):
-        if hasattr(self, 'con'):
+        if self.con:
             self.con.close()
 
     @classmethod
-    def tearDownClass(self):
-        self.srv.stop()
-        self.srv.clean()
+    def tearDownClass(cls):
+        cls.srv.stop()
+        cls.srv.clean()
diff --git a/test/suites/test_crud.py b/test/suites/test_crud.py
index 633b7159..2bbc5513 100644
--- a/test/suites/test_crud.py
+++ b/test/suites/test_crud.py
@@ -1,11 +1,18 @@
+"""
+This module tests integration with tarantool/crud.
+"""
+# pylint: disable=missing-class-docstring,missing-function-docstring,protected-access
+
 import re
 import sys
 import time
 import unittest
+
 import tarantool
-from .lib.tarantool_server import TarantoolServer
 from tarantool.error import DatabaseError
 
+from .lib.tarantool_server import TarantoolServer
+
 
 def create_server():
     srv = TarantoolServer()
@@ -15,31 +22,51 @@ def create_server():
     return srv
 
 
+def create_mock_server():
+    srv = TarantoolServer()
+    srv.script = 'test/suites/crud_mock_server.lua'
+    srv.start()
+
+    return srv
+
+
 @unittest.skipIf(sys.platform.startswith("win"),
-                 "Crud tests on windows platform are not supported: " +
+                 "Crud tests on windows platform are not supported: "
                  "complexity of the vshard replicaset configuration")
-class TestSuite_Crud(unittest.TestCase):
+class TestSuiteCrud(unittest.TestCase):
 
     @classmethod
-    def setUpClass(self):
+    def setUpClass(cls):
         print(' CRUD '.center(70, '='), file=sys.stderr)
         print('-' * 70, file=sys.stderr)
         # Create server and extract helpful fields for tests.
-        self.srv = create_server()
-        self.host = self.srv.host
-        self.port = self.srv.args['primary']
+        cls.srv = create_server()
+        cls.mock_srv = create_mock_server()
+        cls.host = cls.srv.host
+        cls.port = cls.srv.args['primary']
+        cls.mock_host = cls.mock_srv.host
+        cls.mock_port = cls.mock_srv.args['primary']
 
     def setUp(self):
         time.sleep(1)
         # Open connections to instance.
-        self.conn = tarantool.Connection(host=self.host, port=self.port, 
-                                         user='guest', password='')
-        self.conn_mesh = tarantool.MeshConnection(host=self.host, port=self.port, 
-                                         user='guest', password='')
-        self.conn_pool = tarantool.ConnectionPool([{'host':self.host, 'port':self.port}], 
-                                                     user='guest', password='')
+        self.conn = tarantool.Connection(host=self.host, port=self.port,
+                                         user='guest', password='', fetch_schema=False)
+        self.mock_conn = tarantool.Connection(host=self.mock_host, port=self.mock_port,
+                                              user='guest', password='', fetch_schema=False)
+        self.conn_mesh = tarantool.MeshConnection(host=self.host, port=self.port,
+                                                  user='guest', password='', fetch_schema=False)
+        self.conn_pool = tarantool.ConnectionPool([{'host': self.host, 'port': self.port}],
+                                                  user='guest', password='',
+                                                  fetch_schema=False)
         # Time for vshard group configuration.
         time.sleep(1)
+        if self.conn.eval('return ROCKS_IMPORT_FAIL').data[0] is True:
+            raise unittest.SkipTest('The crud/vshard modules are not detected, '
+                                    'installation via rocks install is required '
+                                    'for CRUD testing purposes. You can use '
+                                    '<tarantoolctl rocks install crud> or '
+                                    '<tt rocks install crud> to install modules')
 
     crud_test_cases = {
         'crud_insert': {
@@ -56,9 +83,7 @@ def setUp(self):
                     'args': ['tester', [1, 100, 'Bob'], {'timeout': 10}],
                 },
                 'output': {
-                    'str': [
-                            r'Duplicate key exists',
-                        ],
+                    'str': [r'Duplicate key exists'],
                 },
             },
         },
@@ -73,12 +98,11 @@ def setUp(self):
             },
             'error': {
                 'input': {
-                    'args': ['tester', {'id': 2, 'bucket_id': 100, 'name': 'Logan'}, {'timeout': 10}],
+                    'args': ['tester', {'id': 2, 'bucket_id': 100, 'name': 'Logan'},
+                             {'timeout': 10}],
                 },
                 'output': {
-                    'str': [
-                            r'Duplicate key exists',
-                        ],
+                    'str': [r'Duplicate key exists'],
                 },
             },
         },
@@ -86,7 +110,7 @@ def setUp(self):
             'success': {
                 'input': {
                     'args': [
-                        'tester', 
+                        'tester',
                         [
                             [3, 100, 'Jacob'],
                             [4, 100, 'Wyatt'],
@@ -98,17 +122,17 @@ def setUp(self):
                 },
                 'output': {
                     'rows': [
-                                [3, 100, 'Jacob'],
-                                [4, 100, 'Wyatt'],
-                                [5, 100, 'David'],
-                                [6, 100, 'Leo'],
-                            ],
+                        [3, 100, 'Jacob'],
+                        [4, 100, 'Wyatt'],
+                        [5, 100, 'David'],
+                        [6, 100, 'Leo'],
+                    ],
                 },
             },
             'error': {
                 'input': {
                     'args': [
-                        'tester', 
+                        'tester',
                         [
                             [3, 100, 'Julian'],
                             [4, 100, 'Hudson'],
@@ -119,9 +143,7 @@ def setUp(self):
                     ],
                 },
                 'output': {
-                    'str': [
-                            r'Duplicate key exists',
-                        ],
+                    'str': [r'Duplicate key exists'],
                     'res_rows': [[7, 100, 'Grayson'], [8, 100, 'Ezra']]
                 },
             },
@@ -130,7 +152,7 @@ def setUp(self):
             'success': {
                 'input': {
                     'args': [
-                        'tester', 
+                        'tester',
                         [
                             {'id': 9, 'bucket_id': 100, 'name': 'Sharar'},
                             {'id': 10, 'bucket_id': 100, 'name': 'Thaddeus'},
@@ -142,17 +164,17 @@ def setUp(self):
                 },
                 'output': {
                     'rows': [
-                                [9, 100, 'Sharar'],
-                                [10, 100, 'Thaddeus'],
-                                [11, 100, 'Tobit'],
-                                [12, 100, 'Zeb'],
-                            ],
+                        [9, 100, 'Sharar'],
+                        [10, 100, 'Thaddeus'],
+                        [11, 100, 'Tobit'],
+                        [12, 100, 'Zeb'],
+                    ],
                 },
             },
             'error': {
                 'input': {
                     'args': [
-                        'tester', 
+                        'tester',
                         [
                             {'id': 9, 'bucket_id': 100, 'name': 'Silvanus'},
                             {'id': 10, 'bucket_id': 100, 'name': 'Timeus'},
@@ -163,9 +185,7 @@ def setUp(self):
                     ],
                 },
                 'output': {
-                    'str': [
-                            r'Duplicate key exists',
-                        ],
+                    'str': [r'Duplicate key exists'],
                     'res_rows': [[13, 100, 'Uzzi'], [14, 100, 'Zimiri']]
                 },
             },
@@ -184,9 +204,7 @@ def setUp(self):
                     'args': ['no-such-space-name', [1, 100, 'Bob'], {'timeout': 10}],
                 },
                 'output': {
-                    'str': [
-                            r'GetError: Space "no-such-space-name" doesn\'t exist', 
-                        ],
+                    'str': [r'GetError: Space "no-such-space-name" doesn\'t exist'],
                 },
             },
         },
@@ -204,9 +222,7 @@ def setUp(self):
                     'args': ['tester', 1, [['+', 'age', 1]], {'timeout': 10}],
                 },
                 'output': {
-                    'str': [
-                            r"UpdateError", 
-                        ],
+                    'str': [r"UpdateError"],
                 },
             },
         },
@@ -224,9 +240,7 @@ def setUp(self):
                     'args': ['no-such-space-name', 1, {'timeout': 10}],
                 },
                 'output': {
-                    'str': [
-                            r'DeleteError: Space "no-such-space-name" doesn\'t exist', 
-                        ],
+                    'str': [r'DeleteError: Space "no-such-space-name" doesn\'t exist'],
                 },
             },
         },
@@ -244,16 +258,17 @@ def setUp(self):
                     'args': ['tester', [1, 100, 0], {'timeout': 10}],
                 },
                 'output': {
-                    'str': [
-                            r'expected string',
-                        ],
+                    'str': [r'expected string'],
                 },
             },
         },
         'crud_replace_object': {
             'success': {
                 'input': {
-                    'args': ['tester', {'id': 2, 'bucket_id': 100, 'name': 'Eliza'}, {'timeout': 10}],
+                    'args': [
+                        'tester', {'id': 2, 'bucket_id': 100, 'name': 'Eliza'},
+                        {'timeout': 10}
+                    ],
                 },
                 'output': {
                     'rows': [[2, 100, 'Eliza']],
@@ -264,9 +279,7 @@ def setUp(self):
                     'args': ['tester', {'id': 2, 'bucket_id': 100, 'name': 0}, {'timeout': 10}],
                 },
                 'output': {
-                    'str': [
-                            r'expected string',
-                        ],
+                    'str': [r'expected string'],
                 },
             },
         },
@@ -274,7 +287,7 @@ def setUp(self):
             'success': {
                 'input': {
                     'args': [
-                        'tester', 
+                        'tester',
                         [
                             [2, 100, 'Cephus'],
                             [3, 100, 'Esau'],
@@ -286,17 +299,17 @@ def setUp(self):
                 },
                 'output': {
                     'rows': [
-                                [2, 100, 'Cephus'],
-                                [3, 100, 'Esau'],
-                                [4, 100, 'Haman'],
-                                [5, 100, 'Gershon'],
-                            ],
+                        [2, 100, 'Cephus'],
+                        [3, 100, 'Esau'],
+                        [4, 100, 'Haman'],
+                        [5, 100, 'Gershon'],
+                    ],
                 },
             },
             'error': {
                 'input': {
                     'args': [
-                        'tester', 
+                        'tester',
                         [
                             [3, 100, 'Ephron'],
                             [4, 100, 'Ethan'],
@@ -307,9 +320,7 @@ def setUp(self):
                     ],
                 },
                 'output': {
-                    'str': [
-                            r'expected string',
-                        ],
+                    'str': [r'expected string'],
                     'res_rows': [[3, 100, 'Ephron'], [4, 100, 'Ethan']]
                 },
             },
@@ -318,7 +329,7 @@ def setUp(self):
             'success': {
                 'input': {
                     'args': [
-                        'tester', 
+                        'tester',
                         [
                             {'id': 2, 'bucket_id': 100, 'name': 'Cephus'},
                             {'id': 3, 'bucket_id': 100, 'name': 'Esau'},
@@ -330,17 +341,17 @@ def setUp(self):
                 },
                 'output': {
                     'rows': [
-                                [2, 100, 'Cephus'],
-                                [3, 100, 'Esau'],
-                                [4, 100, 'Haman'],
-                                [5, 100, 'Gershon'],
-                            ],
+                        [2, 100, 'Cephus'],
+                        [3, 100, 'Esau'],
+                        [4, 100, 'Haman'],
+                        [5, 100, 'Gershon'],
+                    ],
                 },
             },
             'error': {
                 'input': {
                     'args': [
-                        'tester', 
+                        'tester',
                         [
                             {'id': 3, 'bucket_id': 100, 'name': 'Ephron'},
                             {'id': 4, 'bucket_id': 100, 'name': 'Ethan'},
@@ -351,9 +362,7 @@ def setUp(self):
                     ],
                 },
                 'output': {
-                    'str': [
-                            r'expected string',
-                        ],
+                    'str': [r'expected string'],
                     'res_rows': [[3, 100, 'Ephron'], [4, 100, 'Ethan']]
                 },
             },
@@ -361,7 +370,8 @@ def setUp(self):
         'crud_upsert': {
             'success': {
                 'input': {
-                    'args': ['tester', [2, 100, 'Cephus'], [['+', 'bucket_id', 1]], {'timeout': 10}],
+                    'args': ['tester', [2, 100, 'Cephus'], [['+', 'bucket_id', 1]],
+                             {'timeout': 10}],
                 },
                 'output': {
                     'rows': [],
@@ -372,17 +382,15 @@ def setUp(self):
                     'args': ['tester', [2, 100, 'Cephus'], [['+', 'age', 1]], {'timeout': 10}],
                 },
                 'output': {
-                    'str': [
-                            r"UpsertError", 
-                        ],
+                    'str': [r"UpsertError"],
                 },
             },
         },
         'crud_upsert_object': {
             'success': {
                 'input': {
-                    'args': ['tester', {'id': 2, 'bucket_id': 100, 'name': 'Cephus'}, 
-                        [['+', 'bucket_id', 1]], {'timeout': 10}],
+                    'args': ['tester', {'id': 2, 'bucket_id': 100, 'name': 'Cephus'},
+                             [['+', 'bucket_id', 1]], {'timeout': 10}],
                 },
                 'output': {
                     'rows': [],
@@ -390,13 +398,11 @@ def setUp(self):
             },
             'error': {
                 'input': {
-                    'args': ['tester', {'id': 2, 'bucket_id': 100, 'name': 'Cephus'}, 
-                        [['+', 'age', 1]], {'timeout': 10}],
+                    'args': ['tester', {'id': 2, 'bucket_id': 100, 'name': 'Cephus'},
+                             [['+', 'age', 1]], {'timeout': 10}],
                 },
                 'output': {
-                    'str': [
-                            r"UpsertError",
-                        ],
+                    'str': [r"UpsertError"],
                 },
             },
         },
@@ -419,7 +425,7 @@ def setUp(self):
             'error': {
                 'input': {
                     'args': [
-                        'tester', 
+                        'tester',
                         [
                             [[3, 100, 'Ephron'], [['+', 'bucket_id', 1]]],
                             [[4, 100, 'Ethan'], [['+', 'bucket_id', 1]]],
@@ -430,9 +436,7 @@ def setUp(self):
                     ],
                 },
                 'output': {
-                    'str': [
-                            r'expected string',
-                        ],
+                    'str': [r'expected string'],
                 },
             },
         },
@@ -442,10 +446,22 @@ def setUp(self):
                     'args': [
                         'tester',
                         [
-                            [{'id': 2, 'bucket_id': 100, 'name': 'Cephus'}, [['+', 'bucket_id', 1]]],
-                            [{'id': 3, 'bucket_id': 100, 'name': 'Esau'}, [['+', 'bucket_id', 1]]],
-                            [{'id': 4, 'bucket_id': 100, 'name': 'Haman'}, [['+', 'bucket_id', 1]]],
-                            [{'id': 5, 'bucket_id': 100, 'name': 'Gershon'}, [['+', 'bucket_id', 1]]],
+                            [
+                                {'id': 2, 'bucket_id': 100, 'name': 'Cephus'},
+                                [['+', 'bucket_id', 1]]
+                            ],
+                            [
+                                {'id': 3, 'bucket_id': 100, 'name': 'Esau'},
+                                [['+', 'bucket_id', 1]]
+                            ],
+                            [
+                                {'id': 4, 'bucket_id': 100, 'name': 'Haman'},
+                                [['+', 'bucket_id', 1]]
+                            ],
+                            [
+                                {'id': 5, 'bucket_id': 100, 'name': 'Gershon'},
+                                [['+', 'bucket_id', 1]]
+                            ],
                         ],
                         {'timeout': 10},
                     ],
@@ -455,20 +471,30 @@ def setUp(self):
             'error': {
                 'input': {
                     'args': [
-                        'tester', 
+                        'tester',
                         [
-                            [{'id': 3, 'bucket_id': 100, 'name': 'Ephron'}, [['+', 'bucket_id', 1]]],
-                            [{'id': 4, 'bucket_id': 100, 'name': 'Ethan'}, [['+', 'bucket_id', 1]]],
-                            [{'id': 7, 'bucket_id': 100, 'name': 0}, [['+', 'bucket_id', 1]]],
-                            [{'id': 8, 'bucket_id': 100, 'name': 0}, [['+', 'bucket_id', 1]]],
+                            [
+                                {'id': 3, 'bucket_id': 100, 'name': 'Ephron'},
+                                [['+', 'bucket_id', 1]]
+                            ],
+                            [
+                                {'id': 4, 'bucket_id': 100, 'name': 'Ethan'},
+                                [['+', 'bucket_id', 1]]
+                            ],
+                            [
+                                {'id': 7, 'bucket_id': 100, 'name': 0},
+                                [['+', 'bucket_id', 1]]
+                            ],
+                            [
+                                {'id': 8, 'bucket_id': 100, 'name': 0},
+                                [['+', 'bucket_id', 1]]
+                            ],
                         ],
                         {'timeout': 10},
                     ],
                 },
                 'output': {
-                    'str': [
-                            r'expected string',
-                        ],
+                    'str': [r'expected string'],
                 },
             },
         },
@@ -486,9 +512,7 @@ def setUp(self):
                     'args': ['no-such-space-name'],
                 },
                 'output': {
-                    'str': [
-                            r'SelectError: Space "no-such-space-name" doesn\'t exist', 
-                        ],
+                    'str': [r'SelectError: Space "no-such-space-name" doesn\'t exist'],
                 },
             },
         },
@@ -506,9 +530,7 @@ def setUp(self):
                     'args': ['tester', 'no-idx'],
                 },
                 'output': {
-                    'str': [
-                            r'BorderError: Index "no-idx" of space "tester" doesn\'t exist', 
-                        ],
+                    'str': [r'BorderError: Index "no-idx" of space "tester" doesn\'t exist'],
                 },
             },
         },
@@ -526,9 +548,7 @@ def setUp(self):
                     'args': ['tester', 'no-idx', {'timeout': 10}],
                 },
                 'output': {
-                    'str': [
-                            r'BorderError: Index "no-idx" of space "tester" doesn\'t exist', 
-                        ],
+                    'str': [r'BorderError: Index "no-idx" of space "tester" doesn\'t exist'],
                 },
             },
         },
@@ -546,9 +566,7 @@ def setUp(self):
                     'args': ['no-such-space-name', {'timeout': 10}],
                 },
                 'output': {
-                    'str': [
-                            r'LenError: Space "no-such-space-name" doesn\'t exist', 
-                        ],
+                    'str': [r'LenError: Space "no-such-space-name" doesn\'t exist'],
                 },
             },
         },
@@ -566,9 +584,7 @@ def setUp(self):
                     'args': ['no-such-space-name', [['==', 'bucket_id', 100]], {'timeout': 10}],
                 },
                 'output': {
-                    'str': [
-                            r'CountError: Space "no-such-space-name" doesn\'t exist', 
-                        ],
+                    'str': [r'CountError: Space "no-such-space-name" doesn\'t exist'],
                 },
             },
         },
@@ -577,34 +593,34 @@ def setUp(self):
                 'input': {
                     'args': [
                         [
-                            [1, 100, 'Mike'], 
-                            [2, 100, 'Mike'], 
-                            [3, 100, 'Mike'], 
-                            [4, 100, 'Mike'], 
-                            [5, 200, 'Bill'], 
+                            [1, 100, 'Mike'],
+                            [2, 100, 'Mike'],
+                            [3, 100, 'Mike'],
+                            [4, 100, 'Mike'],
+                            [5, 200, 'Bill'],
                             [6, 300, 'Rob'],
                         ],
                         [
-                            {'name': 'id', 'type': 'unsigned'}, 
-                            {'name': 'bucket_id', 'type': 'unsigned'}, 
+                            {'name': 'id', 'type': 'unsigned'},
+                            {'name': 'bucket_id', 'type': 'unsigned'},
                             {'name': 'name', 'type': 'string'}
                         ],
                     ],
                 },
                 'output': {
                     'scalar': [
-                        {'bucket_id': 100, 'name': 'Mike', 'id': 1}, 
-                        {'bucket_id': 100, 'name': 'Mike', 'id': 2}, 
-                        {'bucket_id': 100, 'name': 'Mike', 'id': 3}, 
-                        {'bucket_id': 100, 'name': 'Mike', 'id': 4}, 
-                        {'bucket_id': 200, 'name': 'Bill', 'id': 5}, 
+                        {'bucket_id': 100, 'name': 'Mike', 'id': 1},
+                        {'bucket_id': 100, 'name': 'Mike', 'id': 2},
+                        {'bucket_id': 100, 'name': 'Mike', 'id': 3},
+                        {'bucket_id': 100, 'name': 'Mike', 'id': 4},
+                        {'bucket_id': 200, 'name': 'Bill', 'id': 5},
                         {'bucket_id': 300, 'name': 'Rob', 'id': 6},
                     ],
                 },
             },
             'error': {
                 'input': {
-                    'args': [[],[]],
+                    'args': [[], []],
                 },
                 'output': {
                     'str': [],
@@ -625,9 +641,7 @@ def setUp(self):
                     'args': ['no-such-space-name', {'timeout': 10}],
                 },
                 'output': {
-                    'str': [
-                            r'"no-such-space-name" doesn\'t exist', 
-                        ],
+                    'str': [r'"no-such-space-name" doesn\'t exist'],
                 },
             },
         },
@@ -638,13 +652,13 @@ def setUp(self):
                 },
                 'output': {
                     'operations': [
-                            'insert', 'replace',
-                            'upsert', 'len',
-                            'delete', 'get',
-                            'select', 'borders',
-                            'update', 'count',
-                            'truncate',
-                        ],
+                        'insert', 'replace',
+                        'upsert', 'len',
+                        'delete', 'get',
+                        'select', 'borders',
+                        'update', 'count',
+                        'truncate',
+                    ],
                 },
             },
             'error': {
@@ -669,17 +683,17 @@ def _correct_operation_with_crud(self, testing_function, case, mode=None):
                 *case['success']['input']['args'],
             )
         if 'rows' in case['success']['output']:
-            # Case for crud responce as tarantool.crud.CrudResult obj.
+            # Case for crud response as tarantool.crud.CrudResult obj.
             self.assertEqual(resp.rows, case['success']['output']['rows'])
         if 'scalar' in case['success']['output']:
-            # Case for scalar value as crud responce, not tarantool.crud.CrudResult obj.
+            # Case for scalar value as crud response, not tarantool.crud.CrudResult obj.
             self.assertEqual(resp, case['success']['output']['scalar'])
         if 'operations' in case['success']['output']:
             # Case for statistics testing.
             for operation in case['success']['output']['operations']:
-                self.assertEqual(operation in resp.__dict__, True, 
-                    'Problem with finding a field with a statistic about operation ' 
-                        + operation)
+                self.assertEqual(
+                    operation in resp.__dict__, True,
+                    'Problem with finding a field with a statistic about operation ' + operation)
 
     def _exception_operation_with_crud(self, testing_function, case, mode=None):
         try:
@@ -692,60 +706,65 @@ def _exception_operation_with_crud(self, testing_function, case, mode=None):
                 _ = testing_function(
                     *case['error']['input']['args'],
                 )
-        except DatabaseError as e:
+        except DatabaseError as exc:
             for regexp_case in case['error']['output']['str']:
-                if hasattr(e, 'extra_info_error'):
+                if hasattr(exc, 'extra_info_error'):
                     # Case for non-batch operations.
-                    self.assertNotEqual(re.search(regexp_case, e.extra_info_error.str), None)
-                if hasattr(e, 'errors_list'):
+                    self.assertNotEqual(re.search(regexp_case, exc.extra_info_error.str), None)
+                if hasattr(exc, 'errors_list'):
                     # Case for *_many() operations.
                     err_sum = str()
-                    for err in e.errors_list:
+                    for err in exc.errors_list:
                         err_sum = err_sum + err.str
                     self.assertNotEqual(re.search(regexp_case, err_sum), None)
-            if hasattr(e, 'success_list'):
+            if hasattr(exc, 'success_list'):
                 # Case for *_many() operations.
                 if 'res_rows' in case['error']['output']:
-                    self.assertEqual(e.success_list.rows, case['error']['output']['res_rows'])
+                    self.assertEqual(exc.success_list.rows, case['error']['output']['res_rows'])
 
     def test_crud_module_via_connection(self):
-        for case_name in self.crud_test_cases.keys():
-            with self.subTest(name=case_name):
-                case = self.crud_test_cases[case_name]
-                testing_function = getattr(self.conn, case_name)
+        for name, case in self.crud_test_cases.items():
+            with self.subTest(name=name):
+                testing_function = getattr(self.conn, name)
                 # Correct try testing.
                 self._correct_operation_with_crud(testing_function, case)
                 # Exception try testing.
                 self._exception_operation_with_crud(testing_function, case)
 
     def test_crud_module_via_mesh_connection(self):
-        for case_name in self.crud_test_cases.keys():
-            with self.subTest(name=case_name):
-                case = self.crud_test_cases[case_name]
-                testing_function = getattr(self.conn_mesh, case_name)
+        for name, case in self.crud_test_cases.items():
+            with self.subTest(name=name):
+                testing_function = getattr(self.conn_mesh, name)
                 # Correct try testing.
                 self._correct_operation_with_crud(testing_function, case)
                 # Exception try testing.
                 self._exception_operation_with_crud(testing_function, case)
 
     def test_crud_module_via_pool_connection(self):
-        for case_name in self.crud_test_cases.keys():
-            with self.subTest(name=case_name):
-                case = self.crud_test_cases[case_name]
-                testing_function = getattr(self.conn_pool, case_name)
+        for name, case in self.crud_test_cases.items():
+            with self.subTest(name=name):
+                testing_function = getattr(self.conn_pool, name)
                 # Correct try testing.
                 self._correct_operation_with_crud(testing_function, case, mode=tarantool.Mode.RW)
                 # Exception try testing.
                 self._exception_operation_with_crud(testing_function, case, mode=tarantool.Mode.RW)
 
+    def test_error_rethrow(self):
+        self.assertRaisesRegex(
+            DatabaseError, "Unexpected connection error",
+            lambda: self.mock_conn.crud_replace('tester', [2, 100, 'Alice'], {'timeout': 10}))
+
     def tearDown(self):
         # Close connections to instance.
         self.conn.close()
+        self.mock_conn.close()
         self.conn_mesh.close()
         self.conn_pool.close()
 
     @classmethod
-    def tearDownClass(self):
+    def tearDownClass(cls):
         # Stop instance.
-        self.srv.stop()
-        self.srv.clean()
+        cls.srv.stop()
+        cls.srv.clean()
+        cls.mock_srv.stop()
+        cls.mock_srv.clean()
diff --git a/test/suites/test_datetime.py b/test/suites/test_datetime.py
index fb2d2855..80958fdc 100644
--- a/test/suites/test_datetime.py
+++ b/test/suites/test_datetime.py
@@ -1,47 +1,56 @@
+"""
+This module tests work with datetime type.
+"""
+# pylint: disable=missing-class-docstring,missing-function-docstring,too-many-public-methods,too-many-function-args,duplicate-code
+
 import sys
 import re
 import unittest
+
 import msgpack
-import warnings
-import tarantool
-import pandas
 
+import tarantool
+from tarantool.error import MsgpackError
 from tarantool.msgpack_ext.packer import default as packer_default
 from tarantool.msgpack_ext.unpacker import ext_hook as unpacker_ext_hook
 
 from .lib.tarantool_server import TarantoolServer
-from .lib.skip import skip_or_run_datetime_test
-from tarantool.error import MsgpackError, MsgpackWarning
+from .lib.skip import skip_or_run_datetime_test, skip_or_run_datetime_2_11_test
+from .utils import assert_admin_success
+
 
-class TestSuite_Datetime(unittest.TestCase):
+class TestSuiteDatetime(unittest.TestCase):
     @classmethod
-    def setUpClass(self):
+    def setUpClass(cls):
         print(' DATETIME EXT TYPE '.center(70, '='), file=sys.stderr)
         print('-' * 70, file=sys.stderr)
-        self.srv = TarantoolServer()
-        self.srv.script = 'test/suites/box.lua'
-        self.srv.start()
+        cls.srv = TarantoolServer()
+        cls.srv.script = 'test/suites/box.lua'
+        cls.srv.start()
 
-        self.adm = self.srv.admin
-        self.adm(r"""
+        cls.adm = cls.srv.admin
+        resp = cls.adm("""
             _, datetime = pcall(require, 'datetime')
 
-            box.schema.space.create('test')
+            box.schema.space.create('test', {if_not_exists = true})
             box.space['test']:create_index('primary', {
                 type = 'tree',
                 parts = {1, 'string'},
-                unique = true})
+                unique = true,
+                if_not_exists = true})
 
             pcall(function()
                 box.schema.space.create('test_pk')
                 box.space['test_pk']:create_index('primary', {
                     type = 'tree',
                     parts = {1, 'datetime'},
-                    unique = true})
+                    unique = true,
+                if_not_exists = true})
             end)
 
             box.schema.user.create('test', {password = 'test', if_not_exists = true})
-            box.schema.user.grant('test', 'read,write,execute', 'universe')
+            box.schema.user.grant('test', 'read,write,execute', 'universe',
+                                  nil, {if_not_exists = true})
 
             local function add(arg1, arg2)
                 return arg1 + arg2
@@ -52,53 +61,60 @@ def setUpClass(self):
                 return arg1 - arg2
             end
             rawset(_G, 'sub', sub)
+
+            return true
         """)
+        assert_admin_success(resp)
 
-        self.con = tarantool.Connection(self.srv.host, self.srv.args['primary'],
-                                        user='test', password='test')
+        cls.con = tarantool.Connection(cls.srv.host, cls.srv.args['primary'],
+                                       user='test', password='test')
 
     def setUp(self):
         # prevent a remote tarantool from clean our session
         if self.srv.is_started():
             self.srv.touch_lock()
 
-        self.adm("box.space['test']:truncate()")
-
-
-    def test_Datetime_class_API(self):
-        dt = tarantool.Datetime(year=2022, month=8, day=31, hour=18, minute=7, sec=54,
-                                nsec=308543321, tzoffset=180)
-
-        self.assertEqual(dt.year, 2022)
-        self.assertEqual(dt.month, 8)
-        self.assertEqual(dt.day, 31)
-        self.assertEqual(dt.hour, 18)
-        self.assertEqual(dt.minute, 7)
-        self.assertEqual(dt.sec, 54)
-        self.assertEqual(dt.nsec, 308543321)
-        # Both Tarantool and pandas prone to precision loss for timestamp() floats
-        self.assertEqual(dt.timestamp, 1661958474.308543)
-        self.assertEqual(dt.tzoffset, 180)
-        self.assertEqual(dt.tz, '')
-        self.assertEqual(dt.value, 1661958474308543321)
-
-    def test_Datetime_class_API_wth_tz(self):
-        dt = tarantool.Datetime(year=2022, month=8, day=31, hour=18, minute=7, sec=54,
-                                nsec=308543321, tzoffset=123, tz='Europe/Moscow')
-
-        self.assertEqual(dt.year, 2022)
-        self.assertEqual(dt.month, 8)
-        self.assertEqual(dt.day, 31)
-        self.assertEqual(dt.hour, 18)
-        self.assertEqual(dt.minute, 7)
-        self.assertEqual(dt.sec, 54)
-        self.assertEqual(dt.nsec, 308543321)
-        # Both Tarantool and pandas prone to precision loss for timestamp() floats
-        self.assertEqual(dt.timestamp, 1661958474.308543)
-        self.assertEqual(dt.tzoffset, 180)
-        self.assertEqual(dt.tz, 'Europe/Moscow')
-        self.assertEqual(dt.value, 1661958474308543321)
-
+        resp = self.adm("""
+            box.space['test']:truncate()
+            return true
+        """)
+        assert_admin_success(resp)
+
+    def test_datetime_class_api(self):
+        datetime = tarantool.Datetime(year=2022, month=8, day=31, hour=18, minute=7, sec=54,
+                                      nsec=308543321, tzoffset=180)
+
+        self.assertEqual(datetime.year, 2022)
+        self.assertEqual(datetime.month, 8)
+        self.assertEqual(datetime.day, 31)
+        self.assertEqual(datetime.hour, 18)
+        self.assertEqual(datetime.minute, 7)
+        self.assertEqual(datetime.sec, 54)
+        self.assertEqual(datetime.nsec, 308543321)
+        # Both Tarantool and python prone to precision loss for timestamp() floats
+        self.assertEqual(datetime.timestamp, 1661958474.3085432)
+        self.assertEqual(datetime.tzoffset, 180)
+        self.assertEqual(datetime.tz, '')
+        self.assertEqual(datetime.value, 1661958474308543321)
+        self.assertEqual(str(datetime), '2022-08-31T18:07:54.308543321+03:00')
+
+    def test_datetime_class_api_wth_tz(self):
+        datetime = tarantool.Datetime(year=2022, month=8, day=31, hour=18, minute=7, sec=54,
+                                      nsec=308543321, tzoffset=123, tz='Europe/Moscow')
+
+        self.assertEqual(datetime.year, 2022)
+        self.assertEqual(datetime.month, 8)
+        self.assertEqual(datetime.day, 31)
+        self.assertEqual(datetime.hour, 18)
+        self.assertEqual(datetime.minute, 7)
+        self.assertEqual(datetime.sec, 54)
+        self.assertEqual(datetime.nsec, 308543321)
+        # Both Tarantool and python prone to precision loss for timestamp() floats
+        self.assertEqual(datetime.timestamp, 1661958474.3085432)
+        self.assertEqual(datetime.tzoffset, 180)
+        self.assertEqual(datetime.tz, 'Europe/Moscow')
+        self.assertEqual(datetime.value, 1661958474308543321)
+        self.assertEqual(str(datetime), '2022-08-31T18:07:54.308543321+03:00')
 
     datetime_class_invalid_init_cases = {
         'positional_year': {
@@ -137,17 +153,35 @@ def test_Datetime_class_API_wth_tz(self):
             'type': ValueError,
             'msg': 'Failed to create datetime with ambiguous timezone "AET"'
         },
+        'under_min_timestamp_1': {
+            'args': [],
+            'kwargs': {'timestamp': -62135596801},
+            'type': OverflowError,
+            'msg': 'date value out of range'
+        },
+        'under_min_timestamp_2': {
+            'args': [],
+            'kwargs': {'timestamp': -62135596800, 'nsec': -1},
+            'type': OverflowError,
+            'msg': 'date value out of range'
+        },
+        'over_max_timestamp': {
+            'args': [],
+            'kwargs': {'timestamp': 253402300800},
+            'type': OverflowError,
+            'msg': 'date value out of range'
+        },
     }
 
-    def test_Datetime_class_invalid_init(self):
-        for name in self.datetime_class_invalid_init_cases.keys():
+    def test_datetime_class_invalid_init(self):
+        # pylint: disable=cell-var-from-loop
+
+        for name, case in self.datetime_class_invalid_init_cases.items():
             with self.subTest(msg=name):
-                case = self.datetime_class_invalid_init_cases[name]
                 self.assertRaisesRegex(
                     case['type'], re.escape(case['msg']),
                     lambda: tarantool.Datetime(*case['args'], **case['kwargs']))
 
-
     integration_cases = {
         'date': {
             'python': tarantool.Datetime(year=2022, month=8, day=31),
@@ -178,14 +212,14 @@ def test_Datetime_class_invalid_init(self):
             'python': tarantool.Datetime(year=2022, month=8, day=31, hour=18, minute=7, sec=54,
                                          nsec=308543000),
             'msgpack': (b'\x7a\xa3\x0f\x63\x00\x00\x00\x00\x18\xfe\x63\x12\x00\x00\x00\x00'),
-            'tarantool': r"datetime.new({year=2022, month=8, day=31, hour=18, min=7, sec=54, " +
+            'tarantool': r"datetime.new({year=2022, month=8, day=31, hour=18, min=7, sec=54, "
                          r"nsec=308543000})",
         },
         'datetime_with_nanoseconds': {
             'python': tarantool.Datetime(year=2022, month=8, day=31, hour=18, minute=7, sec=54,
                                          nsec=308543321),
             'msgpack': (b'\x7a\xa3\x0f\x63\x00\x00\x00\x00\x59\xff\x63\x12\x00\x00\x00\x00'),
-            'tarantool': r"datetime.new({year=2022, month=8, day=31, hour=18, min=7, sec=54, " +
+            'tarantool': r"datetime.new({year=2022, month=8, day=31, hour=18, min=7, sec=54, "
                          r"nsec=308543321})",
         },
         'date_before_1970_with_nanoseconds': {
@@ -207,14 +241,14 @@ def test_Datetime_class_invalid_init(self):
             'python': tarantool.Datetime(year=2022, month=8, day=31, hour=18, minute=7, sec=54,
                                          nsec=308543321, tzoffset=180),
             'msgpack': (b'\x4a\x79\x0f\x63\x00\x00\x00\x00\x59\xff\x63\x12\xb4\x00\x00\x00'),
-            'tarantool': r"datetime.new({year=2022, month=8, day=31, hour=18, min=7, sec=54, " +
+            'tarantool': r"datetime.new({year=2022, month=8, day=31, hour=18, min=7, sec=54, "
                          r"nsec=308543321, tzoffset=180})",
         },
         'datetime_with_negative_offset': {
             'python': tarantool.Datetime(year=2022, month=8, day=31, hour=18, minute=7, sec=54,
                                          nsec=308543321, tzoffset=-60),
             'msgpack': (b'\x8a\xb1\x0f\x63\x00\x00\x00\x00\x59\xff\x63\x12\xc4\xff\x00\x00'),
-            'tarantool': r"datetime.new({year=2022, month=8, day=31, hour=18, min=7, sec=54, " +
+            'tarantool': r"datetime.new({year=2022, month=8, day=31, hour=18, min=7, sec=54, "
                          r"nsec=308543321, tzoffset=-60})",
         },
         'timestamp_with_positive_offset': {
@@ -241,7 +275,7 @@ def test_Datetime_class_invalid_init(self):
             'python': tarantool.Datetime(year=2022, month=8, day=31, hour=18, minute=7, sec=54,
                                          nsec=308543321, tz='Europe/Moscow'),
             'msgpack': (b'\x4a\x79\x0f\x63\x00\x00\x00\x00\x59\xff\x63\x12\xb4\x00\xb3\x03'),
-            'tarantool': r"datetime.new({year=2022, month=8, day=31, hour=18, min=7, sec=54, " +
+            'tarantool': r"datetime.new({year=2022, month=8, day=31, hour=18, min=7, sec=54, "
                          r"nsec=308543321, tz='Europe/Moscow'})",
         },
         'datetime_with_tz_winter_time': {
@@ -253,69 +287,84 @@ def test_Datetime_class_invalid_init(self):
             'python': tarantool.Datetime(year=2022, month=8, day=31, hour=18, minute=7, sec=54,
                                          nsec=308543321, tz='Europe/Moscow', tzoffset=123),
             'msgpack': (b'\x4a\x79\x0f\x63\x00\x00\x00\x00\x59\xff\x63\x12\xb4\x00\xb3\x03'),
-            'tarantool': r"datetime.new({year=2022, month=8, day=31, hour=18, min=7, sec=54, " +
+            'tarantool': r"datetime.new({year=2022, month=8, day=31, hour=18, min=7, sec=54, "
                          r"nsec=308543321, tz='Europe/Moscow', tzoffset=123})",
         },
         'datetime_with_abbrev_tz': {
             'python': tarantool.Datetime(year=2022, month=8, day=31, hour=18, minute=7, sec=54,
                                          nsec=308543321, tz='MSK'),
             'msgpack': (b'\x4a\x79\x0f\x63\x00\x00\x00\x00\x59\xff\x63\x12\xb4\x00\xee\x00'),
-            'tarantool': r"datetime.new({year=2022, month=8, day=31, hour=18, min=7, sec=54, " +
+            'tarantool': r"datetime.new({year=2022, month=8, day=31, hour=18, min=7, sec=54, "
                          r"nsec=308543321, tz='MSK'})",
         },
         'datetime_with_abbrev_tz_and_zero_offset': {
             'python': tarantool.Datetime(year=2022, month=8, day=31, hour=18, minute=7, sec=54,
                                          nsec=308543321, tz='AZODT'),
             'msgpack': (b'\x7a\xa3\x0f\x63\x00\x00\x00\x00\x59\xff\x63\x12\x00\x00\x12\x02'),
-            'tarantool': r"datetime.new({year=2022, month=8, day=31, hour=18, min=7, sec=54, " +
+            'tarantool': r"datetime.new({year=2022, month=8, day=31, hour=18, min=7, sec=54, "
                          r"nsec=308543321, tz='AZODT'})",
         },
         'timestamp_since_utc_epoch': {
             'python': tarantool.Datetime(timestamp=1661958474, nsec=308543321,
                                          tz='Europe/Moscow', timestamp_since_utc_epoch=True),
             'msgpack': (b'\x4a\x79\x0f\x63\x00\x00\x00\x00\x59\xff\x63\x12\xb4\x00\xb3\x03'),
-            'tarantool': r"datetime.new({timestamp=1661969274, nsec=308543321, tz='Europe/Moscow'})",
+            'tarantool': r"datetime.new({timestamp=1661969274, nsec=308543321, "
+                         r"tz='Europe/Moscow'})",
+        },
+        'min_datetime': {  # Python datetime.MINYEAR is 1.
+            'python': tarantool.Datetime(year=1, month=1, day=1, hour=0, minute=0, sec=0),
+            'msgpack': (b'\x00\x09\x6e\x88\xf1\xff\xff\xff'),
+            'tarantool': r"datetime.new({year=1, month=1, day=1, hour=0, min=0, sec=0})",
+        },
+        'max_datetime': {  # Python datetime.MAXYEAR is 9999.
+            'python': tarantool.Datetime(year=9999, month=12, day=31, hour=23, minute=59, sec=59,
+                                         nsec=999999999),
+            'msgpack': (b'\x7f\x41\xf4\xff\x3a\x00\x00\x00\xff\xc9\x9a\x3b\x00\x00\x00\x00'),
+            'tarantool': r"datetime.new({year=9999, month=12, day=31, hour=23, min=59, sec=59,"
+                         r"nsec=999999999})",
+        },
+        'min_datetime_timestamp': {  # Python datetime.MINYEAR is 1.
+            'python': tarantool.Datetime(timestamp=-62135596800),
+            'msgpack': (b'\x00\x09\x6e\x88\xf1\xff\xff\xff'),
+            'tarantool': r"datetime.new({timestamp=-62135596800})",
+        },
+        'max_datetime_timestamp': {  # Python datetime.MAXYEAR is 9999.
+            'python': tarantool.Datetime(timestamp=253402300799, nsec=999999999),
+            'msgpack': (b'\x7f\x41\xf4\xff\x3a\x00\x00\x00\xff\xc9\x9a\x3b\x00\x00\x00\x00'),
+            'tarantool': r"datetime.new({timestamp=253402300799, nsec=999999999})",
         },
     }
 
     def test_msgpack_decode(self):
-        for name in self.integration_cases.keys():
+        for name, case in self.integration_cases.items():
             with self.subTest(msg=name):
-                case = self.integration_cases[name]
-
                 self.assertEqual(unpacker_ext_hook(4, case['msgpack']),
                                  case['python'])
 
     @skip_or_run_datetime_test
     def test_tarantool_decode(self):
-        for name in self.integration_cases.keys():
+        for name, case in self.integration_cases.items():
             with self.subTest(msg=name):
-                case = self.integration_cases[name]
-
                 self.adm(f"box.space['test']:replace{{'{name}', {case['tarantool']}, 'field'}}")
 
                 self.assertSequenceEqual(self.con.select('test', name),
                                          [[name, case['python'], 'field']])
 
     def test_msgpack_encode(self):
-        for name in self.integration_cases.keys():
+        for name, case in self.integration_cases.items():
             with self.subTest(msg=name):
-                case = self.integration_cases[name]
-
                 self.assertEqual(packer_default(case['python']),
                                  msgpack.ExtType(code=4, data=case['msgpack']))
 
     @skip_or_run_datetime_test
     def test_tarantool_encode(self):
-        for name in self.integration_cases.keys():
+        for name, case in self.integration_cases.items():
             with self.subTest(msg=name):
-                case = self.integration_cases[name]
-
                 self.con.insert('test', [name, case['python'], 'field'])
 
                 lua_eval = f"""
                     local dt = {case['tarantool']}
-                    
+
                     local tuple = box.space['test']:get('{name}')
                     assert(tuple ~= nil)
 
@@ -341,7 +390,6 @@ def test_msgpack_decode_ambiguous_tzindex(self):
             ValueError, 'Failed to create datetime with ambiguous timezone "AET"',
             lambda: unpacker_ext_hook(4, case))
 
-
     datetime_subtraction_cases = {
         'date': {
             'arg_1': tarantool.Datetime(year=2008, month=2, day=3),
@@ -370,41 +418,37 @@ def test_msgpack_decode_ambiguous_tzindex(self):
     }
 
     def test_python_datetime_subtraction(self):
-        for name in self.datetime_subtraction_cases.keys():
+        for name, case in self.datetime_subtraction_cases.items():
             with self.subTest(msg=name):
-                case = self.datetime_subtraction_cases[name]
-
                 self.assertEqual(case['arg_1'] - case['arg_2'], case['res'])
 
     @skip_or_run_datetime_test
     def test_tarantool_datetime_subtraction(self):
-        for name in self.datetime_subtraction_cases.keys():
+        for name, case in self.datetime_subtraction_cases.items():
             with self.subTest(msg=name):
-                case = self.datetime_subtraction_cases[name]
-
                 self.assertSequenceEqual(self.con.call('sub', case['arg_1'], case['arg_2']),
                                          [case['res']])
 
-
     datetime_subtraction_different_timezones_case = {
         'arg_1': tarantool.Datetime(year=2001, month=2, day=3, tz='UTC'),
         'arg_2': tarantool.Datetime(year=2001, month=2, day=3, tz='MSK'),
-        'res': tarantool.Interval(day=1, hour=-21),
+        # Tarantool datetime comparison is naive, our tarantool.Interval comparison is naive too.
+        # So even though day=1, hour=-21 is the same as minute=180, test assertion fails.
+        'res_python': tarantool.Interval(day=1, hour=-21),
+        'res_tarantool': tarantool.Interval(minute=180),
     }
 
     def test_python_datetime_subtraction_different_timezones(self):
         case = self.datetime_subtraction_different_timezones_case
 
-        self.assertEqual(case['arg_1'] - case['arg_2'], case['res'])
+        self.assertEqual(case['arg_1'] - case['arg_2'], case['res_python'])
 
-    @skip_or_run_datetime_test
-    @unittest.skip('See https://github.com/tarantool/tarantool/issues/7698')
+    @skip_or_run_datetime_2_11_test
     def test_tarantool_datetime_subtraction_different_timezones(self):
         case = self.datetime_subtraction_different_timezones_case
 
         self.assertSequenceEqual(self.con.call('sub', case['arg_1'], case['arg_2']),
-                                         [case['res']])
-
+                                 [case['res_tarantool']])
 
     interval_arithmetic_cases = {
         'year': {
@@ -441,9 +485,9 @@ def test_tarantool_datetime_subtraction_different_timezones(self):
             'arg_1': tarantool.Datetime(year=2008, month=2, day=3, hour=3, minute=36, sec=43),
             'arg_2': tarantool.Interval(nsec=10000023),
             'res_add': tarantool.Datetime(year=2008, month=2, day=3, hour=3, minute=36, sec=43,
-                                      nsec=10000023),
+                                          nsec=10000023),
             'res_sub': tarantool.Datetime(year=2008, month=2, day=3, hour=3, minute=36, sec=42,
-                                      nsec=989999977),
+                                          nsec=989999977),
         },
         'zero': {
             'arg_1': tarantool.Datetime(year=2008, month=2, day=3, hour=3, minute=36, sec=43),
@@ -487,41 +531,38 @@ def test_tarantool_datetime_subtraction_different_timezones(self):
             'res_add': tarantool.Datetime(year=2009, month=3, day=31),
             'res_sub': tarantool.Datetime(year=2009, month=1, day=31),
         },
+        'week': {
+            'arg_1': tarantool.Datetime(year=2008, month=2, day=3),
+            'arg_2': tarantool.Interval(week=1),
+            'res_add': tarantool.Datetime(year=2008, month=2, day=10),
+            'res_sub': tarantool.Datetime(year=2008, month=1, day=27),
+        },
     }
 
-    def test_python_datetime_addition(self):
-        for name in self.interval_arithmetic_cases.keys():
+    def test_python_interval_addition(self):
+        for name, case in self.interval_arithmetic_cases.items():
             with self.subTest(msg=name):
-                case = self.interval_arithmetic_cases[name]
-
                 self.assertEqual(case['arg_1'] + case['arg_2'], case['res_add'])
 
-    def test_python_datetime_subtraction(self):
-        for name in self.interval_arithmetic_cases.keys():
+    def test_python_interval_subtraction(self):
+        for name, case in self.interval_arithmetic_cases.items():
             with self.subTest(msg=name):
-                case = self.interval_arithmetic_cases[name]
-
                 self.assertEqual(case['arg_1'] - case['arg_2'], case['res_sub'])
 
     @skip_or_run_datetime_test
-    def test_tarantool_datetime_addition(self):
-        for name in self.interval_arithmetic_cases.keys():
+    def test_tarantool_interval_addition(self):
+        for name, case in self.interval_arithmetic_cases.items():
             with self.subTest(msg=name):
-                case = self.interval_arithmetic_cases[name]
-
                 self.assertSequenceEqual(self.con.call('add', case['arg_1'], case['arg_2']),
                                          [case['res_add']])
 
     @skip_or_run_datetime_test
-    def test_tarantool_datetime_subtraction(self):
-        for name in self.interval_arithmetic_cases.keys():
+    def test_tarantool_interval_subtraction(self):
+        for name, case in self.interval_arithmetic_cases.items():
             with self.subTest(msg=name):
-                case = self.interval_arithmetic_cases[name]
-
                 self.assertSequenceEqual(self.con.call('sub', case['arg_1'], case['arg_2']),
                                          [case['res_sub']])
 
-
     datetime_addition_winter_time_switch_case = {
         'arg_1': tarantool.Datetime(year=2008, month=1, day=1, hour=12, tz='Europe/Moscow'),
         'arg_2': tarantool.Interval(month=6),
@@ -533,15 +574,13 @@ def test_python_datetime_addition_winter_time_switch(self):
 
         self.assertEqual(case['arg_1'] + case['arg_2'], case['res'])
 
-    @skip_or_run_datetime_test
-    @unittest.skip('See https://github.com/tarantool/tarantool/issues/7700')
+    @skip_or_run_datetime_2_11_test
     def test_tarantool_datetime_addition_winter_time_switch(self):
         case = self.datetime_addition_winter_time_switch_case
 
         self.assertSequenceEqual(self.con.call('add', case['arg_1'], case['arg_2']),
                                  [case['res']])
 
-
     @skip_or_run_datetime_test
     def test_primary_key(self):
         data = [tarantool.Datetime(year=1970, month=1, day=1), 'content']
@@ -549,8 +588,100 @@ def test_primary_key(self):
         self.assertSequenceEqual(self.con.insert('test_pk', data), [data])
         self.assertSequenceEqual(self.con.select('test_pk', data[0]), [data])
 
+    datetime_nsec_overflow_cases = {
+        'overflow_datetime': {
+            'arg_1': tarantool.Datetime(year=2008, month=1, day=1, nsec=1230000000),
+            'arg_2': tarantool.Datetime(year=2008, month=1, day=1, sec=1, nsec=230000000),
+        },
+        'underflow_datetime': {
+            'arg_1': tarantool.Datetime(year=2008, month=1, day=1, nsec=-123456789),
+            'arg_2': tarantool.Datetime(year=2007, month=12, day=31, hour=23, minute=59,
+                                        sec=59, nsec=876543211),
+        },
+        'overflow_timestamp': {
+            'arg_1': tarantool.Datetime(timestamp=1199145600, nsec=1230000000),
+            'arg_2': tarantool.Datetime(timestamp=1199145600 + 1, nsec=230000000),
+        },
+        'underflow_timestamp': {
+            'arg_1': tarantool.Datetime(timestamp=1199145600, nsec=-123456789),
+            'arg_2': tarantool.Datetime(timestamp=1199145600 - 1, nsec=876543211),
+        }
+    }
+
+    def test_python_datetime_nsec_overflow(self):
+        for name, case in self.datetime_nsec_overflow_cases.items():
+            with self.subTest(msg=name):
+                self.assertEqual(case['arg_1'], case['arg_2'])
+
+    datetime_str_format = {
+        'date': {
+            'python': tarantool.Datetime(year=2022, month=8, day=31),
+            'str': '2022-08-31T00:00:00',
+        },
+        'date_before_1970': {
+            'python': tarantool.Datetime(year=1900, month=1, day=1),
+            'str': '1900-01-01T00:00:00',
+        },
+        'datetime_with_minutes': {
+            'python': tarantool.Datetime(year=2022, month=8, day=31, hour=18, minute=7),
+            'str': '2022-08-31T18:07:00',
+        },
+        'datetime_with_seconds': {
+            'python': tarantool.Datetime(year=2022, month=8, day=31, hour=18, minute=7, sec=54),
+            'str': '2022-08-31T18:07:54',
+        },
+        'datetime_with_microseconds': {
+            'python': tarantool.Datetime(year=2022, month=8, day=31, hour=18, minute=7, sec=54,
+                                         nsec=308543000),
+            'str': '2022-08-31T18:07:54.308543',
+        },
+        'datetime_with_nanoseconds': {
+            'python': tarantool.Datetime(year=2022, month=8, day=31, hour=18, minute=7, sec=54,
+                                         nsec=308543321),
+            'str': '2022-08-31T18:07:54.308543321',
+        },
+        'datetime_with_positive_offset': {
+            'python': tarantool.Datetime(year=2022, month=8, day=31, hour=18, minute=7, sec=54,
+                                         nsec=308543321, tzoffset=180),
+            'str': '2022-08-31T18:07:54.308543321+03:00',
+        },
+        'datetime_with_negative_offset': {
+            'python': tarantool.Datetime(year=2022, month=8, day=31, hour=18, minute=7, sec=54,
+                                         nsec=308543321, tzoffset=-60),
+            'str': '2022-08-31T18:07:54.308543321-01:00',
+        },
+        'date_with_utc_tz': {
+            'python': tarantool.Datetime(year=1970, month=1, day=1, tz='UTC'),
+            'str': '1970-01-01T00:00:00+00:00',
+        },
+        'date_with_tz': {
+            'python': tarantool.Datetime(year=2022, month=8, day=31, tz='Europe/Moscow'),
+            'str': '2022-08-31T00:00:00+03:00',
+        },
+        'datetime_with_tz': {
+            'python': tarantool.Datetime(year=2022, month=8, day=31, hour=18, minute=7, sec=54,
+                                         nsec=308543321, tz='Europe/Moscow'),
+            'str': '2022-08-31T18:07:54.308543321+03:00',
+        },
+        'datetime_with_tz_and_offset': {
+            'python': tarantool.Datetime(year=2022, month=8, day=31, hour=18, minute=7, sec=54,
+                                         nsec=308543321, tz='Europe/Moscow', tzoffset=123),
+            'str': '2022-08-31T18:07:54.308543321+03:00',
+        },
+        'datetime_with_abbrev_tz': {
+            'python': tarantool.Datetime(year=2022, month=8, day=31, hour=18, minute=7, sec=54,
+                                         nsec=308543321, tz='MSK'),
+            'str': '2022-08-31T18:07:54.308543321+03:00',
+        },
+    }
+
+    def test_python_datetime_string(self):
+        for name, case in self.datetime_str_format.items():
+            with self.subTest(msg=name):
+                self.assertEqual(str(case['python']), case['str'])
+
     @classmethod
-    def tearDownClass(self):
-        self.con.close()
-        self.srv.stop()
-        self.srv.clean()
+    def tearDownClass(cls):
+        cls.con.close()
+        cls.srv.stop()
+        cls.srv.clean()
diff --git a/test/suites/test_dbapi.py b/test/suites/test_dbapi.py
index 0df06337..bd8c7487 100644
--- a/test/suites/test_dbapi.py
+++ b/test/suites/test_dbapi.py
@@ -1,3 +1,8 @@
+"""
+This module tests compatibility with DBAPI standards.
+"""
+# pylint: disable=missing-class-docstring,missing-function-docstring,protected-access,fixme
+
 import sys
 import unittest
 
@@ -7,29 +12,41 @@
 from tarantool import dbapi
 from .lib.tarantool_server import TarantoolServer
 from .lib.skip import skip_or_run_sql_test
+from .utils import assert_admin_success
 
 
-class TestSuite_DBAPI(dbapi20.DatabaseAPI20Test):
+class TestSuiteDBAPI(dbapi20.DatabaseAPI20Test):
     table_prefix = 'dbapi20test_'  # If you need to specify a prefix for tables
 
-    ddl0 = 'create table %s (id INTEGER PRIMARY KEY AUTOINCREMENT, ' \
+    ddl0 = f'create table {table_prefix} (id INTEGER PRIMARY KEY AUTOINCREMENT, ' \
            'name varchar(20))'
-    ddl1 = 'create table %sbooze (name varchar(20) primary key)' % table_prefix
-    ddl2 = 'create table %sbarflys (name varchar(20) primary key, ' \
-           'drink varchar(30))' % table_prefix
+    ddl1 = f'create table {table_prefix}booze (name varchar(20) primary key)'
+    ddl2 = f'create table {table_prefix}barflys (name varchar(20) primary key, ' \
+           'drink varchar(30))'
 
     @classmethod
-    def setUpClass(self):
+    def setUpClass(cls):
         print(' DBAPI '.center(70, '='), file=sys.stderr)
         print('-' * 70, file=sys.stderr)
-        self.srv = TarantoolServer()
-        self.srv.script = 'test/suites/box.lua'
-        self.srv.start()
-        self.con = tarantool.Connection(self.srv.host, self.srv.args['primary'])
-        self.driver = dbapi
-        self.connect_kw_args = dict(
-            host=self.srv.host,
-            port=self.srv.args['primary'])
+        # Select scans are not allowed with compat.sql_seq_scan_default = "new",
+        # but tests create cursors with fullscan.
+        cls.srv = TarantoolServer(sql_seq_scan_default="old")
+        cls.srv.script = 'test/suites/box.lua'
+        cls.srv.start()
+        cls.con = tarantool.Connection(cls.srv.host, cls.srv.args['primary'])
+        cls.driver = dbapi
+        cls.connect_kw_args = {
+            "host": cls.srv.host,
+            "port": cls.srv.args['primary']
+        }
+
+        # grant full access to guest
+        resp = cls.srv.admin("""
+            box.schema.user.grant('guest', 'create,read,write,execute', 'universe',
+                                  nil, {if_not_exists = true})
+            return true
+        """)
+        assert_admin_success(resp)
 
     @skip_or_run_sql_test
     def setUp(self):
@@ -38,42 +55,48 @@ def setUp(self):
             self.srv.touch_lock()
         self.con.flush_schema()
 
-        # grant full access to guest
-        self.srv.admin("box.schema.user.grant('guest', 'create,read,write,"
-                       "execute', 'universe')")
-
     @classmethod
-    def tearDownClass(self):
-        self.con.close()
-        self.srv.stop()
-        self.srv.clean()
+    def tearDownClass(cls):
+        cls.con.close()
+        cls.srv.stop()
+        cls.srv.clean()
+
+    def help_nextset_setUp(self, cur):
+        # pylint: disable=unused-argument
+        pass
+
+    def help_nextset_tearDown(self, cur):
+        # pylint: disable=unused-argument
+        pass
 
     def test_rowcount(self):
         con = self._connect()
         try:
             cur = con.cursor()
             self.executeDDL1(cur)
-            dbapi20._failUnless(self,cur.rowcount in (-1, 1),
+            dbapi20._failUnless(
+                self, cur.rowcount in (-1, 1),
                 'cursor.rowcount should be -1 or 1 after executing no-result '
                 'statements' + str(cur.rowcount)
-                )
-            cur.execute("%s into %sbooze values ('Victoria Bitter')" % (
-                self.insert, self.table_prefix
-                ))
-            dbapi20._failUnless(self,cur.rowcount == 1,
+            )
+            cur.execute(f"{self.insert} into {self.table_prefix}booze values ('Victoria Bitter')")
+            dbapi20._failUnless(
+                self, cur.rowcount == 1,
                 'cursor.rowcount should == number or rows inserted, or '
                 'set to -1 after executing an insert statement'
-                )
-            cur.execute("select name from %sbooze" % self.table_prefix)
-            dbapi20._failUnless(self,cur.rowcount == -1,
+            )
+            cur.execute(f"select name from {self.table_prefix}booze")
+            dbapi20._failUnless(
+                self, cur.rowcount == -1,
                 'cursor.rowcount should == number of rows returned, or '
                 'set to -1 after executing a select statement'
-                )
+            )
             self.executeDDL2(cur)
-            dbapi20._failUnless(self,cur.rowcount in (-1, 1),
+            dbapi20._failUnless(
+                self, cur.rowcount in (-1, 1),
                 'cursor.rowcount should be -1 or 1 after executing no-result '
                 'statements'
-                )
+            )
         finally:
             con.close()
 
@@ -127,43 +150,3 @@ def test_setoutputsize(self):  # Do nothing
     @unittest.skip('Not implemented')
     def test_description(self):
         pass
-
-    def test_ExceptionsAsConnectionAttributes(self):
-        # Workaround for https://github.com/baztian/dbapi-compliance/issues/5
-
-        # OPTIONAL EXTENSION 
-        # Test for the optional DB API 2.0 extension, where the exceptions 
-        # are exposed as attributes on the Connection object 
-        # I figure this optional extension will be implemented by any 
-        # driver author who is using this test suite, so it is enabled 
-        # by default. 
-        drv = self.driver
-        con = self._connect()
-        try:
-            dbapi20._failUnless(self,con.Warning is drv.Warning)
-            dbapi20._failUnless(self,con.Error is drv.Error)
-            dbapi20._failUnless(self,con.InterfaceError is drv.InterfaceError)
-            dbapi20._failUnless(self,con.DatabaseError is drv.DatabaseError)
-            dbapi20._failUnless(self,con.OperationalError is drv.OperationalError)
-            dbapi20._failUnless(self,con.IntegrityError is drv.IntegrityError)
-            dbapi20._failUnless(self,con.InternalError is drv.InternalError)
-            dbapi20._failUnless(self,con.ProgrammingError is drv.ProgrammingError)
-            dbapi20. _failUnless(self,con.NotSupportedError is drv.NotSupportedError)
-        finally:
-            con.close()
-
-
-    def test_rollback(self):
-        # Workaround for https://github.com/baztian/dbapi-compliance/issues/5
-
-        con = self._connect()
-        try:
-            # If rollback is defined, it should either work or throw
-            # the documented exception
-            if hasattr(con,'rollback'):
-                try:
-                    con.rollback()
-                except self.driver.NotSupportedError:
-                    pass
-        finally:
-            con.close()
diff --git a/test/suites/test_decimal.py b/test/suites/test_decimal.py
index 8029d7b9..2875a7da 100644
--- a/test/suites/test_decimal.py
+++ b/test/suites/test_decimal.py
@@ -1,58 +1,74 @@
+"""
+This module tests work with decimal type.
+"""
+# pylint: disable=missing-class-docstring,missing-function-docstring,duplicate-code
+
 import sys
 import unittest
 import decimal
+
 import msgpack
-import warnings
-import tarantool
 
+import tarantool
+from tarantool.error import MsgpackError, MsgpackWarning
 from tarantool.msgpack_ext.packer import default as packer_default
 from tarantool.msgpack_ext.unpacker import ext_hook as unpacker_ext_hook
 
 from .lib.tarantool_server import TarantoolServer
 from .lib.skip import skip_or_run_decimal_test
-from tarantool.error import MsgpackError, MsgpackWarning
+from .utils import assert_admin_success
+
 
-class TestSuite_Decimal(unittest.TestCase):
+class TestSuiteDecimal(unittest.TestCase):
     @classmethod
-    def setUpClass(self):
+    def setUpClass(cls):
         print(' DECIMAL EXT TYPE '.center(70, '='), file=sys.stderr)
         print('-' * 70, file=sys.stderr)
-        self.srv = TarantoolServer()
-        self.srv.script = 'test/suites/box.lua'
-        self.srv.start()
+        cls.srv = TarantoolServer()
+        cls.srv.script = 'test/suites/box.lua'
+        cls.srv.start()
 
-        self.adm = self.srv.admin
-        self.adm(r"""
-            _, decimal = pcall(require, 'decimal')
+        cls.adm = cls.srv.admin
+        resp = cls.adm("""
+            decimal_supported, decimal = pcall(require, 'decimal')
 
-            box.schema.space.create('test')
+            box.schema.space.create('test', {if_not_exists = true})
             box.space['test']:create_index('primary', {
                 type = 'tree',
                 parts = {1, 'string'},
-                unique = true})
+                unique = true,
+                if_not_exists = true})
 
-            pcall(function()
+            if decimal_supported then
                 box.schema.space.create('test_pk')
                 box.space['test_pk']:create_index('primary', {
                     type = 'tree',
                     parts = {1, 'decimal'},
-                    unique = true})
-            end)
+                    unique = true,
+                    if_not_exists = true})
+            end
 
             box.schema.user.create('test', {password = 'test', if_not_exists = true})
-            box.schema.user.grant('test', 'read,write,execute', 'universe')
+            box.schema.user.grant('test', 'read,write,execute', 'universe',
+                                  nil, {if_not_exists = true})
+
+            return true
         """)
+        assert_admin_success(resp)
 
-        self.con = tarantool.Connection(self.srv.host, self.srv.args['primary'],
-                                        user='test', password='test')
+        cls.con = tarantool.Connection(cls.srv.host, cls.srv.args['primary'],
+                                       user='test', password='test')
 
     def setUp(self):
         # prevent a remote tarantool from clean our session
         if self.srv.is_started():
             self.srv.touch_lock()
 
-        self.adm("box.space['test']:truncate()")
-
+        resp = self.adm("""
+            box.space['test']:truncate()
+            return true
+        """)
+        assert_admin_success(resp)
 
     valid_cases = {
         'simple_decimal_1': {
@@ -157,13 +173,13 @@ def setUp(self):
         },
         'decimal_limits_1': {
             'python': decimal.Decimal('11111111111111111111111111111111111111'),
-            'msgpack': (b'\x00\x01\x11\x11\x11\x11\x11\x11\x11\x11\x11' +
+            'msgpack': (b'\x00\x01\x11\x11\x11\x11\x11\x11\x11\x11\x11'
                         b'\x11\x11\x11\x11\x11\x11\x11\x11\x11\x1c'),
             'tarantool': "decimal.new('11111111111111111111111111111111111111')",
         },
         'decimal_limits_2': {
             'python': decimal.Decimal('-11111111111111111111111111111111111111'),
-            'msgpack': (b'\x00\x01\x11\x11\x11\x11\x11\x11\x11\x11\x11' +
+            'msgpack': (b'\x00\x01\x11\x11\x11\x11\x11\x11\x11\x11\x11'
                         b'\x11\x11\x11\x11\x11\x11\x11\x11\x11\x1d'),
             'tarantool': "decimal.new('-11111111111111111111111111111111111111')",
         },
@@ -199,44 +215,73 @@ def setUp(self):
         },
         'decimal_limits_9': {
             'python': decimal.Decimal('99999999999999999999999999999999999999'),
-            'msgpack': (b'\x00\x09\x99\x99\x99\x99\x99\x99\x99\x99\x99' +
+            'msgpack': (b'\x00\x09\x99\x99\x99\x99\x99\x99\x99\x99\x99'
                         b'\x99\x99\x99\x99\x99\x99\x99\x99\x99\x9c'),
             'tarantool': "decimal.new('99999999999999999999999999999999999999')",
         },
         'decimal_limits_10': {
             'python': decimal.Decimal('-99999999999999999999999999999999999999'),
-            'msgpack': (b'\x00\x09\x99\x99\x99\x99\x99\x99\x99\x99\x99' +
+            'msgpack': (b'\x00\x09\x99\x99\x99\x99\x99\x99\x99\x99\x99'
                         b'\x99\x99\x99\x99\x99\x99\x99\x99\x99\x9d'),
             'tarantool': "decimal.new('-99999999999999999999999999999999999999')",
         },
         'decimal_limits_11': {
             'python': decimal.Decimal('1234567891234567890.0987654321987654321'),
-            'msgpack': (b'\x13\x01\x23\x45\x67\x89\x12\x34\x56\x78\x90' +
+            'msgpack': (b'\x13\x01\x23\x45\x67\x89\x12\x34\x56\x78\x90'
                         b'\x09\x87\x65\x43\x21\x98\x76\x54\x32\x1c'),
             'tarantool': "decimal.new('1234567891234567890.0987654321987654321')",
         },
         'decimal_limits_12': {
             'python': decimal.Decimal('-1234567891234567890.0987654321987654321'),
-            'msgpack': (b'\x13\x01\x23\x45\x67\x89\x12\x34\x56\x78\x90' +
+            'msgpack': (b'\x13\x01\x23\x45\x67\x89\x12\x34\x56\x78\x90'
                         b'\x09\x87\x65\x43\x21\x98\x76\x54\x32\x1d'),
             'tarantool': "decimal.new('-1234567891234567890.0987654321987654321')",
         },
+        'decimal_exponent_1': {
+            'python': decimal.Decimal('1e33'),
+            'msgpack': (b'\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00'
+                        b'\x00\x00\x00\x00\x00\x00\x00\x0c'),
+            'tarantool': "decimal.new('1e33')",
+        },
+        'decimal_exponent_2': {
+            'python': decimal.Decimal('1.2345e33'),
+            'msgpack': (b'\x00\x01\x23\x45\x00\x00\x00\x00\x00\x00\x00'
+                        b'\x00\x00\x00\x00\x00\x00\x00\x0c'),
+            'tarantool': "decimal.new('1.2345e33')",
+        },
+        'decimal_exponent_3': {
+            'python': decimal.Decimal('1.2345e2'),
+            'msgpack': (b'\x02\x12\x34\x5c'),
+            'tarantool': "decimal.new('1.2345e2')",
+        },
+        'decimal_exponent_4': {
+            'python': decimal.Decimal('1.2345e4'),
+            'msgpack': (b'\x00\x12\x34\x5c'),
+            'tarantool': "decimal.new('1.2345e4')",
+        },
+        'decimal_exponent_5': {
+            'python': decimal.Decimal('-1e33'),
+            'msgpack': (b'\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00'
+                        b'\x00\x00\x00\x00\x00\x00\x00\x0d'),
+            'tarantool': "decimal.new('-1e33')",
+        },
+        'decimal_exponent_6': {
+            'python': decimal.Decimal('1e-33'),
+            'msgpack': (b'\x21\x1c'),
+            'tarantool': "decimal.new('1e-33')",
+        },
     }
 
     def test_msgpack_decode(self):
-        for name in self.valid_cases.keys():
+        for name, case in self.valid_cases.items():
             with self.subTest(msg=name):
-                case = self.valid_cases[name]
-
                 self.assertEqual(unpacker_ext_hook(1, case['msgpack']),
                                  case['python'])
 
     @skip_or_run_decimal_test
     def test_tarantool_decode(self):
-        for name in self.valid_cases.keys():
+        for name, case in self.valid_cases.items():
             with self.subTest(msg=name):
-                case = self.valid_cases[name]
-
                 self.adm(f"box.space['test']:replace{{'{name}', {case['tarantool']}}}")
 
                 self.assertSequenceEqual(
@@ -244,19 +289,15 @@ def test_tarantool_decode(self):
                     [[name, case['python']]])
 
     def test_msgpack_encode(self):
-        for name in self.valid_cases.keys():
+        for name, case in self.valid_cases.items():
             with self.subTest(msg=name):
-                case = self.valid_cases[name]
-
                 self.assertEqual(packer_default(case['python']),
                                  msgpack.ExtType(code=1, data=case['msgpack']))
 
     @skip_or_run_decimal_test
     def test_tarantool_encode(self):
-        for name in self.valid_cases.keys():
+        for name, case in self.valid_cases.items():
             with self.subTest(msg=name):
-                case = self.valid_cases[name]
-
                 self.con.insert('test', [name, case['python']])
 
                 lua_eval = f"""
@@ -274,7 +315,6 @@ def test_tarantool_encode(self):
 
                 self.assertSequenceEqual(self.con.eval(lua_eval), [True])
 
-
     error_cases = {
         'decimal_limit_break_head_1': {
             'python': decimal.Decimal('999999999999999999999999999999999999999'),
@@ -303,10 +343,10 @@ def test_tarantool_encode(self):
     }
 
     def test_msgpack_encode_error(self):
-        for name in self.error_cases.keys():
-            with self.subTest(msg=name):
-                case = self.error_cases[name]
+        # pylint: disable=cell-var-from-loop
 
+        for name, case in self.error_cases.items():
+            with self.subTest(msg=name):
                 msg = 'Decimal cannot be encoded: Tarantool decimal ' + \
                       'supports a maximum of 38 digits.'
                 self.assertRaisesRegex(
@@ -315,17 +355,16 @@ def test_msgpack_encode_error(self):
 
     @skip_or_run_decimal_test
     def test_tarantool_encode_error(self):
-        for name in self.error_cases.keys():
-            with self.subTest(msg=name):
-                case = self.error_cases[name]
+        # pylint: disable=cell-var-from-loop
 
+        for name, case in self.error_cases.items():
+            with self.subTest(msg=name):
                 msg = 'Decimal cannot be encoded: Tarantool decimal ' + \
                       'supports a maximum of 38 digits.'
                 self.assertRaisesRegex(
                     MsgpackError, msg,
                     lambda: self.con.insert('test', [name, case['python']]))
 
-
     precision_loss_cases = {
         'decimal_limit_break_tail_1': {
             'python': decimal.Decimal('1.00000000000000000000000000000000000001'),
@@ -359,53 +398,54 @@ def test_tarantool_encode_error(self):
         },
         'decimal_limit_break_tail_7': {
             'python': decimal.Decimal('99999999999999999999999999999999999999.1'),
-            'msgpack': (b'\x00\x09\x99\x99\x99\x99\x99\x99\x99\x99\x99' +
+            'msgpack': (b'\x00\x09\x99\x99\x99\x99\x99\x99\x99\x99\x99'
                         b'\x99\x99\x99\x99\x99\x99\x99\x99\x99\x9c'),
             'tarantool': "decimal.new('99999999999999999999999999999999999999')",
         },
         'decimal_limit_break_tail_8': {
             'python': decimal.Decimal('-99999999999999999999999999999999999999.1'),
-            'msgpack': (b'\x00\x09\x99\x99\x99\x99\x99\x99\x99\x99\x99' +
+            'msgpack': (b'\x00\x09\x99\x99\x99\x99\x99\x99\x99\x99\x99'
                         b'\x99\x99\x99\x99\x99\x99\x99\x99\x99\x9d'),
             'tarantool': "decimal.new('-99999999999999999999999999999999999999')",
         },
         'decimal_limit_break_tail_9': {
-            'python': decimal.Decimal('99999999999999999999999999999999999999.1111111111111111111111111'),
-            'msgpack': (b'\x00\x09\x99\x99\x99\x99\x99\x99\x99\x99\x99' +
+            'python': decimal.Decimal('99999999999999999999999999999999999999.11111111111111'
+                                      '11111111111'),
+            'msgpack': (b'\x00\x09\x99\x99\x99\x99\x99\x99\x99\x99\x99'
                         b'\x99\x99\x99\x99\x99\x99\x99\x99\x99\x9c'),
             'tarantool': "decimal.new('99999999999999999999999999999999999999')",
         },
         'decimal_limit_break_tail_10': {
-            'python': decimal.Decimal('-99999999999999999999999999999999999999.1111111111111111111111111'),
-            'msgpack': (b'\x00\x09\x99\x99\x99\x99\x99\x99\x99\x99\x99' +
+            'python': decimal.Decimal('-99999999999999999999999999999999999999.11111111111111'
+                                      '11111111111'),
+            'msgpack': (b'\x00\x09\x99\x99\x99\x99\x99\x99\x99\x99\x99'
                         b'\x99\x99\x99\x99\x99\x99\x99\x99\x99\x9d'),
             'tarantool': "decimal.new('-99999999999999999999999999999999999999')",
         },
     }
 
     def test_msgpack_encode_with_precision_loss(self):
-        for name in self.precision_loss_cases.keys():
-            with self.subTest(msg=name):
-                case = self.precision_loss_cases[name]
+        # pylint: disable=cell-var-from-loop
 
+        for name, case in self.precision_loss_cases.items():
+            with self.subTest(msg=name):
                 msg = 'Decimal encoded with loss of precision: ' + \
                       'Tarantool decimal supports a maximum of 38 digits.'
 
                 self.assertWarnsRegex(
                     MsgpackWarning, msg,
                     lambda: self.assertEqual(
-                                packer_default(case['python']),
-                                msgpack.ExtType(code=1, data=case['msgpack'])
-                            )
+                        packer_default(case['python']),
+                        msgpack.ExtType(code=1, data=case['msgpack'])
                     )
-                
+                )
 
     @skip_or_run_decimal_test
     def test_tarantool_encode_with_precision_loss(self):
-        for name in self.precision_loss_cases.keys():
-            with self.subTest(msg=name):
-                case = self.precision_loss_cases[name]
+        # pylint: disable=cell-var-from-loop
 
+        for name, case in self.precision_loss_cases.items():
+            with self.subTest(msg=name):
                 msg = 'Decimal encoded with loss of precision: ' + \
                       'Tarantool decimal supports a maximum of 38 digits.'
 
@@ -428,7 +468,6 @@ def test_tarantool_encode_with_precision_loss(self):
 
                 self.assertSequenceEqual(self.con.eval(lua_eval), [True])
 
-
     @skip_or_run_decimal_test
     def test_primary_key(self):
         data = [decimal.Decimal('0'), 'content']
@@ -436,9 +475,8 @@ def test_primary_key(self):
         self.assertSequenceEqual(self.con.insert('test_pk', data), [data])
         self.assertSequenceEqual(self.con.select('test_pk', data[0]), [data])
 
-
     @classmethod
-    def tearDownClass(self):
-        self.con.close()
-        self.srv.stop()
-        self.srv.clean()
+    def tearDownClass(cls):
+        cls.con.close()
+        cls.srv.stop()
+        cls.srv.clean()
diff --git a/test/suites/test_dml.py b/test/suites/test_dml.py
index 2dbff1b5..26539eec 100644
--- a/test/suites/test_dml.py
+++ b/test/suites/test_dml.py
@@ -1,3 +1,8 @@
+"""
+This module tests basic data operations.
+"""
+# pylint: disable=missing-class-docstring,missing-function-docstring,protected-access,fixme,too-many-public-methods,duplicate-code
+
 import sys
 import unittest
 import tarantool
@@ -5,47 +10,55 @@
 
 from .lib.tarantool_server import TarantoolServer
 from .lib.skip import skip_or_run_error_extra_info_test
+from .utils import assert_admin_success
+
 
-class TestSuite_Request(unittest.TestCase):
+class TestSuiteRequest(unittest.TestCase):
     @classmethod
-    def setUpClass(self):
+    def setUpClass(cls):
         print(' DML '.center(70, '='), file=sys.stderr)
         print('-' * 70, file=sys.stderr)
-        self.srv = TarantoolServer()
-        self.srv.script = 'test/suites/box.lua'
-        self.srv.start()
-        self.con = tarantool.Connection(self.srv.host, self.srv.args['primary'])
-        self.adm = self.srv.admin
-        self.space_created = self.adm("box.schema.create_space('space_1')")
-        self.adm("""
-        box.space['space_1']:create_index('primary', {
-            type = 'tree',
-            parts = {1, 'num'},
-            unique = true})
-        """.replace('\n', ' '))
-        self.adm("""
-        box.space['space_1']:create_index('secondary', {
-            type = 'tree',
-            parts = {2, 'num', 3, 'str'},
-            unique = false})
-        """.replace('\n', ' '))
-        self.space_created = self.adm("box.schema.create_space('space_2')")
-        self.adm("""
-        box.space['space_2']:create_index('primary', {
-            type = 'hash',
-            parts = {1, 'num'},
-            unique = true})
-        """.replace('\n', ' '))
-        self.adm("json = require('json')")
-        self.adm("fiber = require('fiber')")
-        self.adm("uuid = require('uuid')")
+        cls.srv = TarantoolServer()
+        cls.srv.script = 'test/suites/box.lua'
+        cls.srv.start()
+        cls.con = tarantool.Connection(cls.srv.host, cls.srv.args['primary'])
+        cls.adm = cls.srv.admin
+        cls.space_created = cls.adm("box.schema.create_space('space_1', {if_not_exists = true})")
+        resp = cls.adm("""
+            box.space['space_1']:create_index('primary', {
+                type = 'tree',
+                parts = {1, 'num'},
+                unique = true,
+                if_not_exists = true})
+
+            box.space['space_1']:create_index('secondary', {
+                type = 'tree',
+                parts = {2, 'num', 3, 'str'},
+                unique = false,
+                if_not_exists = true})
+
+            box.schema.create_space('space_2', {if_not_exists = true})
+
+            box.space['space_2']:create_index('primary', {
+                type = 'hash',
+                parts = {1, 'num'},
+                unique = true,
+                if_not_exists = true})
+
+            json = require('json')
+            fiber = require('fiber')
+            uuid = require('uuid')
+
+            return true
+        """)
+        assert_admin_success(resp)
 
         if not sys.platform.startswith("win"):
-            self.sock_srv = TarantoolServer(create_unix_socket=True)
-            self.sock_srv.script = 'test/suites/box.lua'
-            self.sock_srv.start()
+            cls.sock_srv = TarantoolServer(create_unix_socket=True)
+            cls.sock_srv.script = 'test/suites/box.lua'
+            cls.sock_srv.start()
         else:
-            self.sock_srv = None
+            cls.sock_srv = None
 
     def setUp(self):
         # prevent a remote tarantool from clean our session
@@ -54,10 +67,11 @@ def setUp(self):
 
     def test_00_00_authenticate(self):
         self.assertIsNone(self.srv.admin("""
-        box.schema.user.create('test', { password = 'test' })
+        box.schema.user.create('test', { password = 'test', if_not_exists = true })
         """))
         self.assertIsNone(self.srv.admin("""
-        box.schema.user.grant('test', 'execute,read,write', 'universe')
+        box.schema.user.grant('test', 'execute,read,write', 'universe',
+                              nil, {if_not_exists = true})
         """))
         self.assertEqual(self.con.authenticate('test', 'test')._data, None)
 
@@ -72,9 +86,10 @@ def test_00_02_fill_space(self):
                 # prevent a remote tarantool from clean our session
                 self.srv.touch_lock()
             self.assertEqual(
-                    self.con.insert('space_1', [i, i%5, 'tuple_'+str(i)])[0],
-                    [i, i%5, 'tuple_'+str(i)]
+                self.con.insert('space_1', [i, i % 5, 'tuple_' + str(i)])[0],
+                [i, i % 5, 'tuple_' + str(i)]
             )
+
     def test_00_03_answer_repr(self):
         repr_str = """- [1, 1, 'tuple_1']"""
         self.assertEqual(repr(self.con.select('space_1', 1)), repr_str)
@@ -83,47 +98,52 @@ def test_02_select(self):
         # Check that select with different keys are Ok. (With and without index names)
         self.assertSequenceEqual(self.con.select('space_1', 20), [[20, 0, 'tuple_20']])
         self.assertSequenceEqual(self.con.select('space_1', [21]), [[21, 1, 'tuple_21']])
-        self.assertSequenceEqual(self.con.select('space_1', [22], index='primary'), [[22, 2, 'tuple_22']])
-        self.assertSequenceEqual(self.con.select('space_1', [23], index='primary'), [[23, 3, 'tuple_23']])
+        self.assertSequenceEqual(self.con.select('space_1', [22], index='primary'),
+                                 [[22, 2, 'tuple_22']])
+        self.assertSequenceEqual(self.con.select('space_1', [23], index='primary'),
+                                 [[23, 3, 'tuple_23']])
         # Check that Offset and Limit args are working fine.
-        self.assertSequenceEqual(self.con.select('space_1', [20], index='primary', limit=1), [[20, 0, 'tuple_20']])
+        self.assertSequenceEqual(self.con.select('space_1', [20], index='primary', limit=1),
+                                 [[20, 0, 'tuple_20']])
         # With other indexes too
         self.assertSequenceEqual(
-                sorted(
-                    self.con.select('space_1', [0], index='secondary', offset=3, limit=0),
-                    key = lambda x: x[0]),
-                []
-            )
+            sorted(
+                self.con.select('space_1', [0], index='secondary', offset=3, limit=0),
+                key=lambda x: x[0]),
+            []
+        )
         self.assertSequenceEqual(
-                sorted(
-                    self.con.select('space_1', [0], index='secondary', offset=3, limit=1),
-                    key = lambda x: x[0]),
-                [[110, 0, 'tuple_110']]
-            )
+            sorted(
+                self.con.select('space_1', [0], index='secondary', offset=3, limit=1),
+                key=lambda x: x[0]),
+            [[110, 0, 'tuple_110']]
+        )
         self.assertSequenceEqual(
-                sorted(
-                    self.con.select('space_1', [0], index='secondary', offset=3, limit=2),
-                    key = lambda x: x[0]),
-                [[110, 0, 'tuple_110'],\
-                [115, 0, 'tuple_115']]
-            )
+            sorted(
+                self.con.select('space_1', [0], index='secondary', offset=3, limit=2),
+                key=lambda x: x[0]),
+            [[110, 0, 'tuple_110'], [115, 0, 'tuple_115']]
+        )
 
         select_req = self.con.select('space_1', [0], index='secondary')
         self.assertEqual(len(select_req), 99)
         for i in select_req:
-            self.assertTrue(not (i[0] % 5))
+            self.assertTrue(not i[0] % 5)
             self.assertTrue(not i[1])
             self.assertTrue(i[2] == 'tuple_' + str(i[0]))
 
         # Check limit again.
-        self.assertEqual(len(self.con.select('space_1', [0, 'tuple_20'], index='secondary', limit=0)), 0)
+        self.assertEqual(
+            len(self.con.select('space_1', [0, 'tuple_20'], index='secondary', limit=0)),
+            0)
         self.assertEqual(len(self.con.select('space_1', [0], index='secondary', limit=0)), 0)
         self.assertEqual(len(self.con.select('space_1', [0], index='secondary', limit=100)), 99)
         self.assertEqual(len(self.con.select('space_1', [0], index='secondary', limit=50)), 50)
 
         # TODO: Check iterator_types
         self.assertSequenceEqual(
-            self.con.select('space_1', [0, 'tuple_20'], index='secondary', limit=2, iterator=tarantool.const.ITERATOR_GT),
+            self.con.select('space_1', [0, 'tuple_20'], index='secondary', limit=2,
+                            iterator=tarantool.const.ITERATOR_GT),
             [[200, 0, 'tuple_200'], [205, 0, 'tuple_205']]
         )
 
@@ -133,18 +153,18 @@ def test_03_delete(self):
         self.assertSequenceEqual(self.con.delete('space_1', [20]), [])
         self.assertSequenceEqual(self.con.select('space_1', [20], index='primary'), [])
         # Check that <index_id> field has no meaning, yet.
-        with self.assertRaisesRegex(tarantool.DatabaseError,
-                '(19, .*)'):
-                self.con.delete('space_1', [1, 'tuple_21'])
-        self.assertSequenceEqual(self.con.select('space_1', [21], index='primary'), [[21, 1, 'tuple_21']])
+        with self.assertRaisesRegex(tarantool.DatabaseError, '(19, .*)'):
+            self.con.delete('space_1', [1, 'tuple_21'])
+        self.assertSequenceEqual(self.con.select('space_1', [21], index='primary'),
+                                 [[21, 1, 'tuple_21']])
 
     def test_04_replace(self):
         # Check replace that is Ok.
-        self.assertSequenceEqual(self.con.replace('space_1', [2, 2, 'tuple_3']), [[2, 2, 'tuple_3']])
+        self.assertSequenceEqual(self.con.replace('space_1', [2, 2, 'tuple_3']),
+                                 [[2, 2, 'tuple_3']])
         self.assertSequenceEqual(self.con.select('space_1', 2), [[2, 2, 'tuple_3']])
         # Check replace that isn't Ok.
-        with self.assertRaisesRegex(tarantool.DatabaseError,
-                '(39, .*)'):
+        with self.assertRaisesRegex(tarantool.DatabaseError, '(39, .*)'):
             self.assertSequenceEqual(self.con.replace('space_1', [2, 2]), [[2, 2, 'tuple_2']])
 
     def test_05_ping(self):
@@ -159,25 +179,28 @@ def test_05_ping(self):
 
     def test_06_update(self):
         self.assertSequenceEqual(self.con.update('space_1', (2,), [('+', 1, 3)]),
-                [[2, 5, 'tuple_3']])
+                                 [[2, 5, 'tuple_3']])
         self.assertSequenceEqual(self.con.update('space_1', (2,), [('-', 1, 3)]),
-                [[2, 2, 'tuple_3']])
+                                 [[2, 2, 'tuple_3']])
         self.assertSequenceEqual(self.con.update('space_1', (2,), [(':', 2, 3, 2, 'lalal')]),
-                [[2, 2, 'tuplalal_3']])
+                                 [[2, 2, 'tuplalal_3']])
         self.assertSequenceEqual(self.con.update('space_1', (2,), [('!', 2, '1')]),
-                [[2, 2, '1', 'tuplalal_3']])
+                                 [[2, 2, '1', 'tuplalal_3']])
         self.assertSequenceEqual(self.con.update('space_1', (2,), [('!', 2, 'oingo, boingo')]),
-                [[2, 2, 'oingo, boingo', '1', 'tuplalal_3']])
+                                 [[2, 2, 'oingo, boingo', '1', 'tuplalal_3']])
         self.assertSequenceEqual(self.con.update('space_1', (2,), [('#', 2, 2)]),
-                [[2, 2, 'tuplalal_3']])
+                                 [[2, 2, 'tuplalal_3']])
 
     def test_07_call_16(self):
-        con = tarantool.Connection(self.srv.host, self.srv.args['primary'], call_16 = True)
+        con = tarantool.Connection(self.srv.host, self.srv.args['primary'], call_16=True)
         try:
             con.authenticate('test', 'test')
-            self.assertSequenceEqual(con.call('json.decode', '[123, 234, 345]'), [[123, 234, 345]])
-            self.assertSequenceEqual(con.call('json.decode', ['[123, 234, 345]']), [[123, 234, 345]])
-            self.assertSequenceEqual(con.call('json.decode', ('[123, 234, 345]',)), [[123, 234, 345]])
+            self.assertSequenceEqual(con.call('json.decode', '[123, 234, 345]'),
+                                     [[123, 234, 345]])
+            self.assertSequenceEqual(con.call('json.decode', ['[123, 234, 345]']),
+                                     [[123, 234, 345]])
+            self.assertSequenceEqual(con.call('json.decode', ('[123, 234, 345]',)),
+                                     [[123, 234, 345]])
             with self.assertRaisesRegex(tarantool.DatabaseError, '(32, .*)'):
                 con.call('json.decode')
             with self.assertRaisesRegex(tarantool.DatabaseError, '(32, .*)'):
@@ -195,7 +218,8 @@ def test_07_call_16(self):
             self.assertEqual(len(ans[0]), 1)
             self.assertIsInstance(ans[0][0], str)
 
-            self.assertSequenceEqual(con.call('box.tuple.new', [1, 2, 3, 'fld_1']), [[1, 2, 3, 'fld_1']])
+            self.assertSequenceEqual(con.call('box.tuple.new', [[1, 2, 3, 'fld_1']]),
+                                     [[1, 2, 3, 'fld_1']])
             self.assertSequenceEqual(con.call('box.tuple.new', 'fld_1'), [['fld_1']])
         finally:
             con.close()
@@ -220,36 +244,42 @@ def test_07_call_17(self):
         self.assertEqual(len(ans), 1)
         self.assertIsInstance(ans[0], str)
 
-        self.assertSequenceEqual(con.call('box.tuple.new', [1, 2, 3, 'fld_1']), [[1, 2, 3, 'fld_1']])
+        self.assertSequenceEqual(con.call('box.tuple.new', [[1, 2, 3, 'fld_1']]),
+                                 [[1, 2, 3, 'fld_1']])
         self.assertSequenceEqual(con.call('box.tuple.new', 'fld_1'), [['fld_1']])
 
         con.close()
 
     def test_08_eval(self):
         self.assertSequenceEqual(self.con.eval('return json.decode(...)',
-                                       '[123, 234, 345]'), [[123, 234, 345]])
+                                 '[123, 234, 345]'), [[123, 234, 345]])
         self.assertSequenceEqual(self.con.eval('return json.decode(...)',
-                                       ['[123, 234, 345]']), [[123, 234, 345]])
+                                 ['[123, 234, 345]']), [[123, 234, 345]])
         self.assertSequenceEqual(self.con.eval('return json.decode(...)',
-                                       ('[123, 234, 345]',)), [[123, 234, 345]])
+                                 ('[123, 234, 345]',)), [[123, 234, 345]])
         self.assertSequenceEqual(self.con.eval('return json.decode("[123, 234, 345]")'),
-                                       [[123, 234, 345]])
-        self.assertSequenceEqual(self.con.eval('return json.decode("[123, 234, 345]"), '+
-                                       'json.decode("[123, 234, 345]")'),
-                                       [[123, 234, 345], [123, 234, 345]])
+                                 [[123, 234, 345]])
+        self.assertSequenceEqual(
+            self.con.eval('return json.decode("[123, 234, 345]"), json.decode("[123, 234, 345]")'),
+            [[123, 234, 345], [123, 234, 345]])
         self.assertSequenceEqual(self.con.eval('json.decode("[123, 234, 345]")'), [])
 
     def test_09_upsert(self):
-        self.assertSequenceEqual(self.con.select('space_1', [22], index='primary'), [[22, 2, 'tuple_22']])
-        self.assertSequenceEqual(self.con.select('space_1', [23], index='primary'), [[23, 3, 'tuple_23']])
-        self.assertSequenceEqual(self.con.select('space_1', [499], index='primary'), [[499, 4, 'tuple_499']])
+        self.assertSequenceEqual(self.con.select('space_1', [22], index='primary'),
+                                 [[22, 2, 'tuple_22']])
+        self.assertSequenceEqual(self.con.select('space_1', [23], index='primary'),
+                                 [[23, 3, 'tuple_23']])
+        self.assertSequenceEqual(self.con.select('space_1', [499], index='primary'),
+                                 [[499, 4, 'tuple_499']])
         self.assertSequenceEqual(self.con.select('space_1', [500], index='primary'), [])
+        self.assertSequenceEqual(
+            self.con.upsert('space_1', [500, 123, 'hello, world'], [(':', 2, 2, 3, "---")]), [])
+        self.assertSequenceEqual(self.con.select('space_1', [500], index='primary'),
+                                 [[500, 123, 'hello, world']])
         self.assertSequenceEqual(self.con.upsert('space_1', [500, 123, 'hello, world'],
-                                         [(':', 2, 2, 3, "---")]), [])
-        self.assertSequenceEqual(self.con.select('space_1', [500], index='primary'), [[500, 123, 'hello, world']])
-        self.assertSequenceEqual(self.con.upsert('space_1', [500, 123, 'hello, world'],
-                                         [(':', 2, 2, 3, "---")]), [])
-        self.assertSequenceEqual(self.con.select('space_1', [500], index='primary'), [[500, 123, 'he---, world']])
+                                 [(':', 2, 2, 3, "---")]), [])
+        self.assertSequenceEqual(self.con.select('space_1', [500], index='primary'),
+                                 [[500, 123, 'he---, world']])
 
     def test_10_space(self):
         space = self.con.space('space_1')
@@ -266,15 +296,15 @@ def test_10_space(self):
             [22, 10, 'lol']
         ])
         self.assertSequenceEqual(space.select([501], index='primary'), [])
-        self.assertSequenceEqual(space.upsert([501, 123, 'hello, world'],
-                                         [(':', 2, 2, 3, "---")]), [])
+        self.assertSequenceEqual(
+            space.upsert([501, 123, 'hello, world'], [(':', 2, 2, 3, "---")]), [])
         self.assertSequenceEqual(space.select([501], index='primary'), [[501, 123, 'hello, world']])
-        self.assertSequenceEqual(space.upsert([501, 123, 'hello, world'],
-                                         [(':', 2, 2, 3, "---")]), [])
+        self.assertSequenceEqual(
+            space.upsert([501, 123, 'hello, world'], [(':', 2, 2, 3, "---")]), [])
         self.assertSequenceEqual(space.update([400], [('!', 2, 'oingo, boingo')]),
-                [[400, 0, 'oingo, boingo', 'tuple_400']])
+                                 [[400, 0, 'oingo, boingo', 'tuple_400']])
         self.assertSequenceEqual(space.update([400], [('#', 2, 1)]),
-                [[400, 0, 'tuple_400']])
+                                 [[400, 0, 'tuple_400']])
         self.assertSequenceEqual(space.delete([900]), [[900, 10, 'foo']])
 
     def test_11_select_all_hash(self):
@@ -289,21 +319,23 @@ def test_11_select_all_hash(self):
             space.select((), iterator=tarantool.const.ITERATOR_EQ)
 
     def test_12_update_fields(self):
-        self.srv.admin(
-        """
-        do
-            local sp = box.schema.create_space('sp', {
-                format = {
-                    { name = 'fir', type = 'unsigned' },
-                    { name = 'sec', type = 'string'   },
-                    { name = 'thi', type = 'unsigned' },
-                }
-            })
-            sp:create_index('pr', {
-                parts = {1, 'unsigned'}
-            })
-        end
-        """)
+        resp = self.srv.admin(
+            """
+            do
+                local sp = box.schema.create_space('sp', {
+                    format = {
+                        { name = 'fir', type = 'unsigned' },
+                        { name = 'sec', type = 'string'   },
+                        { name = 'thi', type = 'unsigned' },
+                    }
+                })
+                sp:create_index('pr', {
+                    parts = {1, 'unsigned'}
+                })
+            end
+            return true
+            """)
+        assert_admin_success(resp)
         self.con.insert('sp', [2, 'help', 4])
         self.assertSequenceEqual(
             self.con.update('sp', (2,), [('+', 'thi', 3)]),
@@ -359,7 +391,12 @@ def test_15_extra_error_info_stacked(self):
             self.assertEqual(exc.extra_info.message, "Timeout exceeded")
             self.assertEqual(exc.extra_info.errno, 0)
             self.assertEqual(exc.extra_info.errcode, 78)
-            self.assertEqual(exc.extra_info.fields, None)
+            actual_fields = exc.extra_info.fields
+            if actual_fields is None:
+                actual_fields = {}
+            expected_fields = {}
+            self.assertGreaterEqual(actual_fields.items(),
+                                    expected_fields.items())
             self.assertNotEqual(exc.extra_info.prev, None)
             prev = exc.extra_info.prev
             self.assertEqual(prev.type, 'ClientError')
@@ -368,7 +405,12 @@ def test_15_extra_error_info_stacked(self):
             self.assertEqual(prev.message, "Unknown error")
             self.assertEqual(prev.errno, 0)
             self.assertEqual(prev.errcode, 0)
-            self.assertEqual(prev.fields, None)
+            actual_fields = prev.fields
+            if actual_fields is None:
+                actual_fields = {}
+            expected_fields = {}
+            self.assertGreaterEqual(actual_fields.items(),
+                                    expected_fields.items())
         else:
             self.fail('Expected error')
 
@@ -383,27 +425,27 @@ def test_16_extra_error_info_fields(self):
             self.assertTrue(isinstance(exc.extra_info.file, str))
             self.assertTrue(exc.extra_info.line > 0)
             self.assertEqual(
-                    exc.extra_info.message,
-                    "Create access to function 'forbidden_function' is denied for user 'test'")
+                exc.extra_info.message,
+                "Create access to function 'forbidden_function' is denied for user 'test'")
             self.assertEqual(exc.extra_info.errno, 0)
             self.assertEqual(exc.extra_info.errcode, 42)
-            self.assertEqual(
-                exc.extra_info.fields,
+            self.assertGreaterEqual(
+                exc.extra_info.fields.items(),
                 {
                     'object_type': 'function',
                     'object_name': 'forbidden_function',
                     'access_type': 'Create'
-                })
+                }.items())
             self.assertEqual(exc.extra_info.prev, None)
         else:
             self.fail('Expected error')
 
     @classmethod
-    def tearDownClass(self):
-        self.con.close()
-        self.srv.stop()
-        self.srv.clean()
-
-        if self.sock_srv is not None:
-            self.sock_srv.stop()
-            self.sock_srv.clean()
+    def tearDownClass(cls):
+        cls.con.close()
+        cls.srv.stop()
+        cls.srv.clean()
+
+        if cls.sock_srv is not None:
+            cls.sock_srv.stop()
+            cls.sock_srv.clean()
diff --git a/test/suites/test_encoding.py b/test/suites/test_encoding.py
index 45bc6053..dcda5983 100644
--- a/test/suites/test_encoding.py
+++ b/test/suites/test_encoding.py
@@ -1,73 +1,93 @@
+"""
+This module tests various type encoding cases.
+"""
+# pylint: disable=missing-class-docstring,missing-function-docstring,duplicate-code
+
 import sys
 import unittest
+import pkg_resources
 
 import tarantool
 from tarantool.error import DatabaseError
 
 from .lib.skip import skip_or_run_varbinary_test, skip_or_run_error_extra_info_test
 from .lib.tarantool_server import TarantoolServer
+from .utils import assert_admin_success
+
+
+class TestSuiteEncoding(unittest.TestCase):
+    # pylint: disable=invalid-name
 
-class TestSuite_Encoding(unittest.TestCase):
     @classmethod
-    def setUpClass(self):
+    def setUpClass(cls):
         print(' ENCODING '.center(70, '='), file=sys.stderr)
         print('-' * 70, file=sys.stderr)
-        self.srv = TarantoolServer()
-        self.srv.script = 'test/suites/box.lua'
-        self.srv.start()
+        cls.srv = TarantoolServer()
+        cls.srv.script = 'test/suites/box.lua'
+        cls.srv.start()
 
-        self.srv.admin("""
-            box.schema.user.create('test', { password = 'test' })
-            box.schema.user.grant('test', 'execute,read,write', 'universe')
+        resp = cls.srv.admin("""
+            box.schema.user.create('test', { password = 'test', if_not_exists = true })
+            box.schema.user.grant('test', 'execute,read,write', 'universe',
+                                  nil, {if_not_exists = true})
+
+            return true
         """)
+        assert_admin_success(resp)
 
-        args = [self.srv.host, self.srv.args['primary']]
-        kwargs = { 'user': 'test', 'password': 'test' }
-        self.con_encoding_utf8 = tarantool.Connection(*args, encoding='utf-8', **kwargs)
-        self.con_encoding_none = tarantool.Connection(*args, encoding=None, **kwargs)
-        self.conns = [self.con_encoding_utf8, self.con_encoding_none]
+        args = [cls.srv.host, cls.srv.args['primary']]
+        kwargs = {'user': 'test', 'password': 'test'}
+        cls.con_encoding_utf8 = tarantool.Connection(*args, encoding='utf-8', **kwargs)
+        cls.con_encoding_none = tarantool.Connection(*args, encoding=None, **kwargs)
+        cls.conns = [cls.con_encoding_utf8, cls.con_encoding_none]
 
-        self.srv.admin("box.schema.create_space('space_str')")
-        self.srv.admin("""
+        resp = cls.srv.admin("""
+            box.schema.create_space('space_str', {if_not_exists = true})
             box.space['space_str']:create_index('primary', {
                 type = 'tree',
                 parts = {1, 'str'},
-                unique = true})
-        """.replace('\n', ' '))
-
-        self.srv.admin("box.schema.create_space('space_varbin')")
-        self.srv.admin(r"""
-            box.space['space_varbin']:format({
-                {
-                    'id',
-                    type = 'number',
-                    is_nullable = false
-                },
-                {
-                    'varbin',
-                    type = 'varbinary',
-                    is_nullable = false,
-                }
-            })
-        """.replace('\n', ' '))
-        self.srv.admin("""
-            box.space['space_varbin']:create_index('id', {
-                type = 'tree',
-                parts = {1, 'number'},
-                unique = true})
-        """.replace('\n', ' '))
-        self.srv.admin("""
-            box.space['space_varbin']:create_index('varbin', {
-                type = 'tree',
-                parts = {2, 'varbinary'},
-                unique = true})
-        """.replace('\n', ' '))
+                unique = true,
+                if_not_exists = true})
+
+            return true
+        """)
+        assert_admin_success(resp)
+
+        if cls.srv.admin.tnt_version >= pkg_resources.parse_version('2.2.1'):
+            resp = cls.srv.admin("""
+                box.schema.create_space('space_varbin', {if_not_exists = true})
+                box.space['space_varbin']:format({
+                    {
+                        'id',
+                        type = 'number',
+                        is_nullable = false
+                    },
+                    {
+                        'varbin',
+                        type = 'varbinary',
+                        is_nullable = false,
+                    }
+                })
+                box.space['space_varbin']:create_index('id', {
+                    type = 'tree',
+                    parts = {1, 'number'},
+                    unique = true,
+                    if_not_exists = true})
+                box.space['space_varbin']:create_index('varbin', {
+                    type = 'tree',
+                    parts = {2, 'varbinary'},
+                    unique = true,
+                    if_not_exists = true})
+
+                    return true
+            """)
+            assert_admin_success(resp)
 
     def assertNotRaises(self, func, *args, **kwargs):
         try:
             func(*args, **kwargs)
-        except Exception as e:
-            self.fail('Function raised Exception: %s' % repr(e))
+        except Exception as exc:  # pylint: disable=bad-option-value,broad-exception-caught,broad-except
+            self.fail(f'Function raised Exception: {repr(exc)}')
 
     def setUp(self):
         # prevent a remote tarantool from clean our session
@@ -92,9 +112,9 @@ def test_01_02_string_decode_for_encoding_utf8_behavior(self):
         data = 'test_01_02'
         space = 'space_str'
 
-        self.srv.admin("box.space['%s']:insert{'%s'}" % (space, data))
+        self.srv.admin(f"box.space['{space}']:insert{{'{data}'}}")
 
-        resp = self.con_encoding_utf8.eval("return box.space['%s']:get('%s')" % (space, data))
+        resp = self.con_encoding_utf8.eval(f"return box.space['{space}']:get('{data}')")
         self.assertSequenceEqual(resp, [[data]])
 
     @skip_or_run_varbinary_test
@@ -105,7 +125,7 @@ def test_01_03_bytes_encode_for_encoding_utf8_behavior(self):
 
         self.assertNotRaises(self.con_encoding_utf8.insert, space, [data_id, data])
 
-        resp = self.con_encoding_utf8.select(space, [ data ], index='varbin')
+        resp = self.con_encoding_utf8.select(space, [data], index='varbin')
         self.assertSequenceEqual(resp, [[data_id, data]])
 
     @skip_or_run_varbinary_test
@@ -115,13 +135,13 @@ def test_01_04_varbinary_decode_for_encoding_utf8_behavior(self):
         data = bytes(bytearray.fromhex(data_hex))
         space = 'space_varbin'
 
-        self.con_encoding_utf8.execute("""
-            INSERT INTO "%s" VALUES (%d, x'%s');
-        """ % (space, data_id, data_hex))
+        self.con_encoding_utf8.execute(f"""
+            INSERT INTO "{space}" VALUES ({data_id}, x'{data_hex}');
+        """)
 
-        resp = self.con_encoding_utf8.execute("""
-            SELECT * FROM "%s" WHERE "varbin" == x'%s';
-        """ % (space, data_hex))
+        resp = self.con_encoding_utf8.execute(f"""
+            SELECT * FROM "{space}" WHERE "varbin" == x'{data_hex}';
+        """)
         self.assertSequenceEqual(resp, [[data_id, data]])
 
     # encoding = None
@@ -144,9 +164,9 @@ def test_02_02_string_decode_for_encoding_none_behavior(self):
         data_decoded = b'test_02_02'
         space = 'space_str'
 
-        self.srv.admin("box.space['%s']:insert{'%s'}" % (space, data))
+        self.srv.admin(f"box.space['{space}']:insert{{'{data}'}}")
 
-        resp = self.con_encoding_none.eval("return box.space['%s']:get('%s')" % (space, data))
+        resp = self.con_encoding_none.eval(f"return box.space['{space}']:get('{data}')")
         self.assertSequenceEqual(resp, [[data_decoded]])
 
     def test_02_03_bytes_encode_for_encoding_none_behavior(self):
@@ -165,13 +185,13 @@ def test_02_04_varbinary_decode_for_encoding_none_behavior(self):
         data = bytes(bytearray.fromhex(data_hex))
         space = 'space_varbin'
 
-        self.con_encoding_none.execute("""
-            INSERT INTO "%s" VALUES (%d, x'%s');
-        """ % (space, data_id, data_hex))
+        self.con_encoding_none.execute(f"""
+            INSERT INTO "{space}" VALUES ({data_id}, x'{data_hex}');
+        """)
 
-        resp = self.con_encoding_none.execute("""
-            SELECT * FROM "%s" WHERE "varbin" == x'%s';
-        """ % (space, data_hex))
+        resp = self.con_encoding_none.execute(f"""
+            SELECT * FROM "{space}" WHERE "varbin" == x'{data_hex}';
+        """)
         self.assertSequenceEqual(resp, [[data_id, data]])
 
     @skip_or_run_error_extra_info_test
@@ -195,8 +215,8 @@ def test_02_05_error_extra_info_decode_for_encoding_none_behavior(self):
             self.fail('Expected error')
 
     @classmethod
-    def tearDownClass(self):
-        for con in self.conns:
+    def tearDownClass(cls):
+        for con in cls.conns:
             con.close()
-        self.srv.stop()
-        self.srv.clean()
+        cls.srv.stop()
+        cls.srv.clean()
diff --git a/test/suites/test_error_ext.py b/test/suites/test_error_ext.py
index 89f5c35f..d5e96e75 100644
--- a/test/suites/test_error_ext.py
+++ b/test/suites/test_error_ext.py
@@ -1,57 +1,68 @@
+"""
+This module tests work with extended error type.
+"""
+# pylint: disable=missing-class-docstring,missing-function-docstring,protected-access,line-too-long,duplicate-code
+
 import sys
 import unittest
-import uuid
-import msgpack
-import warnings
-import tarantool
 import pkg_resources
 
+import msgpack
+
+import tarantool
 from tarantool.msgpack_ext.packer import default as packer_default
 from tarantool.msgpack_ext.unpacker import ext_hook as unpacker_ext_hook
 
 from .lib.tarantool_server import TarantoolServer
 from .lib.skip import skip_or_run_error_ext_type_test
+from .utils import assert_admin_success
+
 
-class TestSuite_ErrorExt(unittest.TestCase):
+class TestSuiteErrorExt(unittest.TestCase):
     @classmethod
-    def setUpClass(self):
+    def setUpClass(cls):
         print(' ERROR EXT TYPE '.center(70, '='), file=sys.stderr)
         print('-' * 70, file=sys.stderr)
-        self.srv = TarantoolServer()
-        self.srv.script = 'test/suites/box.lua'
-        self.srv.start()
+        cls.srv = TarantoolServer()
+        cls.srv.script = 'test/suites/box.lua'
+        cls.srv.start()
 
-        self.adm = self.srv.admin
-        self.adm(r"""
-            box.schema.space.create('test')
+        cls.adm = cls.srv.admin
+        resp = cls.adm("""
+            box.schema.space.create('test', {if_not_exists = true})
             box.space['test']:create_index('primary', {
                 type = 'tree',
                 parts = {1, 'string'},
-                unique = true})
+                unique = true,
+                if_not_exists = true})
 
             box.schema.user.create('test', {password = 'test', if_not_exists = true})
-            box.schema.user.grant('test', 'read,write,execute,create', 'universe')
+            box.schema.user.grant('test', 'read,write,execute,create', 'universe',
+                                  nil, {if_not_exists = true})
 
             box.schema.user.create('no_grants', {if_not_exists = true})
+
+            return true
         """)
+        assert_admin_success(resp)
 
-        self.conn_encoding_utf8 = tarantool.Connection(
-            self.srv.host, self.srv.args['primary'],
+        cls.conn_encoding_utf8 = tarantool.Connection(
+            cls.srv.host, cls.srv.args['primary'],
             user='test', password='test',
             encoding='utf-8')
-        self.conn_encoding_none = tarantool.Connection(
-            self.srv.host, self.srv.args['primary'],
+        cls.conn_encoding_none = tarantool.Connection(
+            cls.srv.host, cls.srv.args['primary'],
             user='test', password='test',
             encoding=None)
 
-        if self.adm.tnt_version >= pkg_resources.parse_version('2.10.0'):
-            self.conn_encoding_utf8.eval(r"""
+        if cls.adm.tnt_version >= pkg_resources.parse_version('2.10.0'):
+            cls.conn_encoding_utf8.eval(r"""
                 local err = box.error.new(box.error.UNKNOWN)
                 rawset(_G, 'simple_error', err)
             """)
 
             # https://github.com/tarantool/tarantool/blob/125c13c81abb302708771ba04d59382d44a4a512/test/box-tap/extended_error.test.lua
-            self.conn_encoding_utf8.eval(r"""
+            cls.conn_encoding_utf8.eval(r"""
                 local user = box.session.user()
                 box.schema.func.create('forbidden_function', {body = 'function() end'})
                 box.session.su('no_grants')
@@ -61,7 +72,7 @@ def setUpClass(self):
             """)
 
             # https://github.com/tarantool/tarantool/blob/125c13c81abb302708771ba04d59382d44a4a512/test/box-tap/extended_error.test.lua
-            self.conn_encoding_utf8.eval(r"""
+            cls.conn_encoding_utf8.eval(r"""
                 local e1 = box.error.new(box.error.UNKNOWN)
                 local e2 = box.error.new(box.error.UNKNOWN)
                 e2:set_prev(e1)
@@ -73,12 +84,15 @@ def setUp(self):
         if self.srv.is_started():
             self.srv.touch_lock()
 
-        self.adm("box.space['test']:truncate()")
-
+        resp = self.adm("""
+            box.space['test']:truncate()
+            return true
+        """)
+        assert_admin_success(resp)
 
     # msgpack data for different encodings are actually the same,
     # but sometimes python msgpack module use different string
-    # types (str8 and str16) for the same strings depending on use_bin_type: 
+    # types (str8 and str16) for the same strings depending on use_bin_type:
     #
     # >>> msgpack.Packer(use_bin_type=True).pack('[string "                     local err = box.error.ne..."]')
     # b'\xd9;[string "                     local err = box.error.ne..."]'
@@ -97,9 +111,9 @@ def setUp(self):
                 errno=0,
                 errcode=0,
             ),
-            'msgpack': (b'\x81\x00\x91\x86\x00\xab\x43\x6c\x69\x65\x6e\x74' +
-                        b'\x45\x72\x72\x6f\x72\x01\xa4\x65\x76\x61\x6c\x02' +
-                        b'\x01\x03\xad\x55\x6e\x6b\x6e\x6f\x77\x6e\x20\x65' +
+            'msgpack': (b'\x81\x00\x91\x86\x00\xab\x43\x6c\x69\x65\x6e\x74'
+                        b'\x45\x72\x72\x6f\x72\x01\xa4\x65\x76\x61\x6c\x02'
+                        b'\x01\x03\xad\x55\x6e\x6b\x6e\x6f\x77\x6e\x20\x65'
                         b'\x72\x72\x6f\x72\x04\x00\x05\x00'),
             'tarantool': "simple_error",
         },
@@ -114,9 +128,9 @@ def setUp(self):
                 errno=0,
                 errcode=0,
             ),
-            'msgpack': (b'\x81\x00\x91\x86\x00\xab\x43\x6c\x69\x65\x6e\x74' +
-                        b'\x45\x72\x72\x6f\x72\x01\xa4\x65\x76\x61\x6c\x02' +
-                        b'\x01\x03\xad\x55\x6e\x6b\x6e\x6f\x77\x6e\x20\x65' +
+            'msgpack': (b'\x81\x00\x91\x86\x00\xab\x43\x6c\x69\x65\x6e\x74'
+                        b'\x45\x72\x72\x6f\x72\x01\xa4\x65\x76\x61\x6c\x02'
+                        b'\x01\x03\xad\x55\x6e\x6b\x6e\x6f\x77\x6e\x20\x65'
                         b'\x72\x72\x6f\x72\x04\x00\x05\x00'),
             'tarantool': "simple_error",
         },
@@ -127,7 +141,8 @@ def setUp(self):
                 type='AccessDeniedError',
                 file='/__w/sdk/sdk/tarantool-2.10/tarantool/src/box/func.c',
                 line=535,
-                message="Execute access to function 'forbidden_function' is denied for user 'no_grants'",
+                message=("Execute access to function 'forbidden_function' is denied "
+                         "for user 'no_grants'"),
                 errno=0,
                 errcode=42,
                 fields={
@@ -136,26 +151,26 @@ def setUp(self):
                     'access_type': 'Execute',
                 },
             ),
-            'msgpack': (b'\x81\x00\x91\x87\x00\xb1\x41\x63\x63\x65\x73\x73' +
-                        b'\x44\x65\x6e\x69\x65\x64\x45\x72\x72\x6f\x72\x01' +
-                        b'\xd9\x34\x2f\x5f\x5f\x77\x2f\x73\x64\x6b\x2f\x73' +
-                        b'\x64\x6b\x2f\x74\x61\x72\x61\x6e\x74\x6f\x6f\x6c' +
-                        b'\x2d\x32\x2e\x31\x30\x2f\x74\x61\x72\x61\x6e\x74' +
-                        b'\x6f\x6f\x6c\x2f\x73\x72\x63\x2f\x62\x6f\x78\x2f' +
-                        b'\x66\x75\x6e\x63\x2e\x63\x02\xcd\x02\x17\x03\xd9' +
-                        b'\x4e\x45\x78\x65\x63\x75\x74\x65\x20\x61\x63\x63' +
-                        b'\x65\x73\x73\x20\x74\x6f\x20\x66\x75\x6e\x63\x74' +
-                        b'\x69\x6f\x6e\x20\x27\x66\x6f\x72\x62\x69\x64\x64' +
-                        b'\x65\x6e\x5f\x66\x75\x6e\x63\x74\x69\x6f\x6e\x27' +
-                        b'\x20\x69\x73\x20\x64\x65\x6e\x69\x65\x64\x20\x66' +
-                        b'\x6f\x72\x20\x75\x73\x65\x72\x20\x27\x6e\x6f\x5f' +
-                        b'\x67\x72\x61\x6e\x74\x73\x27\x04\x00\x05\x2a\x06' +
-                        b'\x83\xab\x6f\x62\x6a\x65\x63\x74\x5f\x74\x79\x70' +
-                        b'\x65\xa8\x66\x75\x6e\x63\x74\x69\x6f\x6e\xab\x6f' +
-                        b'\x62\x6a\x65\x63\x74\x5f\x6e\x61\x6d\x65\xb2\x66' +
-                        b'\x6f\x72\x62\x69\x64\x64\x65\x6e\x5f\x66\x75\x6e' +
-                        b'\x63\x74\x69\x6f\x6e\xab\x61\x63\x63\x65\x73\x73' +
-                        b'\x5f\x74\x79\x70\x65\xa7\x45\x78\x65\x63\x75\x74' +
+            'msgpack': (b'\x81\x00\x91\x87\x00\xb1\x41\x63\x63\x65\x73\x73'
+                        b'\x44\x65\x6e\x69\x65\x64\x45\x72\x72\x6f\x72\x01'
+                        b'\xd9\x34\x2f\x5f\x5f\x77\x2f\x73\x64\x6b\x2f\x73'
+                        b'\x64\x6b\x2f\x74\x61\x72\x61\x6e\x74\x6f\x6f\x6c'
+                        b'\x2d\x32\x2e\x31\x30\x2f\x74\x61\x72\x61\x6e\x74'
+                        b'\x6f\x6f\x6c\x2f\x73\x72\x63\x2f\x62\x6f\x78\x2f'
+                        b'\x66\x75\x6e\x63\x2e\x63\x02\xcd\x02\x17\x03\xd9'
+                        b'\x4e\x45\x78\x65\x63\x75\x74\x65\x20\x61\x63\x63'
+                        b'\x65\x73\x73\x20\x74\x6f\x20\x66\x75\x6e\x63\x74'
+                        b'\x69\x6f\x6e\x20\x27\x66\x6f\x72\x62\x69\x64\x64'
+                        b'\x65\x6e\x5f\x66\x75\x6e\x63\x74\x69\x6f\x6e\x27'
+                        b'\x20\x69\x73\x20\x64\x65\x6e\x69\x65\x64\x20\x66'
+                        b'\x6f\x72\x20\x75\x73\x65\x72\x20\x27\x6e\x6f\x5f'
+                        b'\x67\x72\x61\x6e\x74\x73\x27\x04\x00\x05\x2a\x06'
+                        b'\x83\xab\x6f\x62\x6a\x65\x63\x74\x5f\x74\x79\x70'
+                        b'\x65\xa8\x66\x75\x6e\x63\x74\x69\x6f\x6e\xab\x6f'
+                        b'\x62\x6a\x65\x63\x74\x5f\x6e\x61\x6d\x65\xb2\x66'
+                        b'\x6f\x72\x62\x69\x64\x64\x65\x6e\x5f\x66\x75\x6e'
+                        b'\x63\x74\x69\x6f\x6e\xab\x61\x63\x63\x65\x73\x73'
+                        b'\x5f\x74\x79\x70\x65\xa7\x45\x78\x65\x63\x75\x74'
                         b'\x65'),
             'tarantool': "access_denied_error",
             'ignore_file_info': True,
@@ -167,7 +182,8 @@ def setUp(self):
                 type=b'AccessDeniedError',
                 file=b'/__w/sdk/sdk/tarantool-2.10/tarantool/src/box/func.c',
                 line=535,
-                message=b"Execute access to function 'forbidden_function' is denied for user 'no_grants'",
+                message=(b"Execute access to function 'forbidden_function' is denied "
+                         b"for user 'no_grants'"),
                 errno=0,
                 errcode=42,
                 fields={
@@ -176,26 +192,26 @@ def setUp(self):
                     b'access_type': b'Execute',
                 },
             ),
-            'msgpack': (b'\x81\x00\x91\x87\x00\xb1\x41\x63\x63\x65\x73\x73' +
-                        b'\x44\x65\x6e\x69\x65\x64\x45\x72\x72\x6f\x72\x01' +
-                        b'\xda\x00\x34\x2f\x5f\x5f\x77\x2f\x73\x64\x6b\x2f' +
-                        b'\x73\x64\x6b\x2f\x74\x61\x72\x61\x6e\x74\x6f\x6f' +
-                        b'\x6c\x2d\x32\x2e\x31\x30\x2f\x74\x61\x72\x61\x6e' +
-                        b'\x74\x6f\x6f\x6c\x2f\x73\x72\x63\x2f\x62\x6f\x78' +
-                        b'\x2f\x66\x75\x6e\x63\x2e\x63\x02\xcd\x02\x17\x03' +
-                        b'\xda\x00\x4e\x45\x78\x65\x63\x75\x74\x65\x20\x61' +
-                        b'\x63\x63\x65\x73\x73\x20\x74\x6f\x20\x66\x75\x6e' +
-                        b'\x63\x74\x69\x6f\x6e\x20\x27\x66\x6f\x72\x62\x69' +
-                        b'\x64\x64\x65\x6e\x5f\x66\x75\x6e\x63\x74\x69\x6f' +
-                        b'\x6e\x27\x20\x69\x73\x20\x64\x65\x6e\x69\x65\x64' +
-                        b'\x20\x66\x6f\x72\x20\x75\x73\x65\x72\x20\x27\x6e' +
-                        b'\x6f\x5f\x67\x72\x61\x6e\x74\x73\x27\x04\x00\x05' +
-                        b'\x2a\x06\x83\xab\x6f\x62\x6a\x65\x63\x74\x5f\x74' +
-                        b'\x79\x70\x65\xa8\x66\x75\x6e\x63\x74\x69\x6f\x6e' +
-                        b'\xab\x6f\x62\x6a\x65\x63\x74\x5f\x6e\x61\x6d\x65' +
-                        b'\xb2\x66\x6f\x72\x62\x69\x64\x64\x65\x6e\x5f\x66' +
-                        b'\x75\x6e\x63\x74\x69\x6f\x6e\xab\x61\x63\x63\x65' +
-                        b'\x73\x73\x5f\x74\x79\x70\x65\xa7\x45\x78\x65\x63' +
+            'msgpack': (b'\x81\x00\x91\x87\x00\xb1\x41\x63\x63\x65\x73\x73'
+                        b'\x44\x65\x6e\x69\x65\x64\x45\x72\x72\x6f\x72\x01'
+                        b'\xda\x00\x34\x2f\x5f\x5f\x77\x2f\x73\x64\x6b\x2f'
+                        b'\x73\x64\x6b\x2f\x74\x61\x72\x61\x6e\x74\x6f\x6f'
+                        b'\x6c\x2d\x32\x2e\x31\x30\x2f\x74\x61\x72\x61\x6e'
+                        b'\x74\x6f\x6f\x6c\x2f\x73\x72\x63\x2f\x62\x6f\x78'
+                        b'\x2f\x66\x75\x6e\x63\x2e\x63\x02\xcd\x02\x17\x03'
+                        b'\xda\x00\x4e\x45\x78\x65\x63\x75\x74\x65\x20\x61'
+                        b'\x63\x63\x65\x73\x73\x20\x74\x6f\x20\x66\x75\x6e'
+                        b'\x63\x74\x69\x6f\x6e\x20\x27\x66\x6f\x72\x62\x69'
+                        b'\x64\x64\x65\x6e\x5f\x66\x75\x6e\x63\x74\x69\x6f'
+                        b'\x6e\x27\x20\x69\x73\x20\x64\x65\x6e\x69\x65\x64'
+                        b'\x20\x66\x6f\x72\x20\x75\x73\x65\x72\x20\x27\x6e'
+                        b'\x6f\x5f\x67\x72\x61\x6e\x74\x73\x27\x04\x00\x05'
+                        b'\x2a\x06\x83\xab\x6f\x62\x6a\x65\x63\x74\x5f\x74'
+                        b'\x79\x70\x65\xa8\x66\x75\x6e\x63\x74\x69\x6f\x6e'
+                        b'\xab\x6f\x62\x6a\x65\x63\x74\x5f\x6e\x61\x6d\x65'
+                        b'\xb2\x66\x6f\x72\x62\x69\x64\x64\x65\x6e\x5f\x66'
+                        b'\x75\x6e\x63\x74\x69\x6f\x6e\xab\x61\x63\x63\x65'
+                        b'\x73\x73\x5f\x74\x79\x70\x65\xa7\x45\x78\x65\x63'
                         b'\x75\x74\x65'),
             'tarantool': "access_denied_error",
             'ignore_file_info': True,
@@ -219,12 +235,12 @@ def setUp(self):
                     errcode=0,
                 ),
             ),
-            'msgpack': (b'\x81\x00\x92\x86\x00\xab\x43\x6c\x69\x65\x6e\x74' +
-                        b'\x45\x72\x72\x6f\x72\x01\xa4\x65\x76\x61\x6c\x02' +
-                        b'\x03\x03\xad\x55\x6e\x6b\x6e\x6f\x77\x6e\x20\x65' +
-                        b'\x72\x72\x6f\x72\x04\x00\x05\x00\x86\x00\xab\x43' +
-                        b'\x6c\x69\x65\x6e\x74\x45\x72\x72\x6f\x72\x01\xa4' +
-                        b'\x65\x76\x61\x6c\x02\x02\x03\xad\x55\x6e\x6b\x6e' +
+            'msgpack': (b'\x81\x00\x92\x86\x00\xab\x43\x6c\x69\x65\x6e\x74'
+                        b'\x45\x72\x72\x6f\x72\x01\xa4\x65\x76\x61\x6c\x02'
+                        b'\x03\x03\xad\x55\x6e\x6b\x6e\x6f\x77\x6e\x20\x65'
+                        b'\x72\x72\x6f\x72\x04\x00\x05\x00\x86\x00\xab\x43'
+                        b'\x6c\x69\x65\x6e\x74\x45\x72\x72\x6f\x72\x01\xa4'
+                        b'\x65\x76\x61\x6c\x02\x02\x03\xad\x55\x6e\x6b\x6e'
                         b'\x6f\x77\x6e\x20\x65\x72\x72\x6f\x72\x04\x00\x05\x00'),
             'tarantool': "chained_error",
             'ignore_file_info': False,
@@ -248,23 +264,21 @@ def setUp(self):
                     errcode=0,
                 ),
             ),
-            'msgpack': (b'\x81\x00\x92\x86\x00\xab\x43\x6c\x69\x65\x6e\x74' +
-                        b'\x45\x72\x72\x6f\x72\x01\xa4\x65\x76\x61\x6c\x02' +
-                        b'\x03\x03\xad\x55\x6e\x6b\x6e\x6f\x77\x6e\x20\x65' +
-                        b'\x72\x72\x6f\x72\x04\x00\x05\x00\x86\x00\xab\x43' +
-                        b'\x6c\x69\x65\x6e\x74\x45\x72\x72\x6f\x72\x01\xa4' +
-                        b'\x65\x76\x61\x6c\x02\x02\x03\xad\x55\x6e\x6b\x6e' +
+            'msgpack': (b'\x81\x00\x92\x86\x00\xab\x43\x6c\x69\x65\x6e\x74'
+                        b'\x45\x72\x72\x6f\x72\x01\xa4\x65\x76\x61\x6c\x02'
+                        b'\x03\x03\xad\x55\x6e\x6b\x6e\x6f\x77\x6e\x20\x65'
+                        b'\x72\x72\x6f\x72\x04\x00\x05\x00\x86\x00\xab\x43'
+                        b'\x6c\x69\x65\x6e\x74\x45\x72\x72\x6f\x72\x01\xa4'
+                        b'\x65\x76\x61\x6c\x02\x02\x03\xad\x55\x6e\x6b\x6e'
                         b'\x6f\x77\x6e\x20\x65\x72\x72\x6f\x72\x04\x00\x05\x00'),
             'tarantool': "chained_error",
             'ignore_file_info': False,
         }
     }
 
-
     def test_msgpack_decode(self):
-        for name in self.cases.keys():
+        for name, case in self.cases.items():
             with self.subTest(msg=name):
-                case = self.cases[name]
                 conn = getattr(self, case['conn'])
 
                 self.assertEqual(
@@ -277,9 +291,8 @@ def test_msgpack_decode(self):
 
     @skip_or_run_error_ext_type_test
     def test_tarantool_decode(self):
-        for name in self.cases.keys():
+        for name, case in self.cases.items():
             with self.subTest(msg=name):
-                case = self.cases[name]
                 conn = getattr(self, case['conn'])
 
                 self.adm(f"""
@@ -314,18 +327,23 @@ def test_tarantool_decode(self):
                     self.assertEqual(err.message, expected_err.message)
                     self.assertEqual(err.errno, expected_err.errno)
                     self.assertEqual(err.errcode, expected_err.errcode)
-                    self.assertEqual(err.fields, expected_err.fields)
+                    expected_fields = expected_err.fields
+                    if expected_fields is None:
+                        expected_fields = {}
+                    actual_fields = err.fields
+                    if actual_fields is None:
+                        actual_fields = {}
+                    self.assertGreaterEqual(actual_fields.items(),
+                                            expected_fields.items())
 
                     err = err.prev
                     expected_err = expected_err.prev
 
                 self.assertEqual(err, expected_err)
 
-
     def test_msgpack_encode(self):
-        for name in self.cases.keys():
+        for name, case in self.cases.items():
             with self.subTest(msg=name):
-                case = self.cases[name]
                 conn = getattr(self, case['conn'])
 
                 self.assertEqual(packer_default(case['python'], conn._packer_factory()),
@@ -333,9 +351,8 @@ def test_msgpack_encode(self):
 
     @skip_or_run_error_ext_type_test
     def test_tarantool_encode(self):
-        for name in self.cases.keys():
+        for name, case in self.cases.items():
             with self.subTest(msg=name):
-                case = self.cases[name]
                 conn = getattr(self, case['conn'])
 
                 conn.insert(
@@ -388,10 +405,9 @@ def test_tarantool_encode(self):
 
                 self.assertSequenceEqual(conn.eval(lua_eval), [True])
 
-
     @classmethod
-    def tearDownClass(self):
-        self.conn_encoding_utf8.close()
-        self.conn_encoding_none.close()
-        self.srv.stop()
-        self.srv.clean()
+    def tearDownClass(cls):
+        cls.conn_encoding_utf8.close()
+        cls.conn_encoding_none.close()
+        cls.srv.stop()
+        cls.srv.clean()
diff --git a/test/suites/test_execute.py b/test/suites/test_execute.py
index f90b2fc3..46e85ce7 100644
--- a/test/suites/test_execute.py
+++ b/test/suites/test_execute.py
@@ -1,12 +1,18 @@
+"""
+This module tests API for running SQL on a server.
+"""
+# pylint: disable=missing-class-docstring,missing-function-docstring,duplicate-code
+
 import sys
 import unittest
 
 import tarantool
 from .lib.tarantool_server import TarantoolServer
 from .lib.skip import skip_or_run_sql_test
+from .utils import assert_admin_success
 
 
-class TestSuite_Execute(unittest.TestCase):
+class TestSuiteExecute(unittest.TestCase):
     ddl = 'create table %s (id INTEGER PRIMARY KEY AUTOINCREMENT, ' \
           'name varchar(20))'
 
@@ -19,13 +25,21 @@ class TestSuite_Execute(unittest.TestCase):
     ]
 
     @classmethod
-    def setUpClass(self):
+    def setUpClass(cls):
         print(' EXECUTE '.center(70, '='), file=sys.stderr)
         print('-' * 70, file=sys.stderr)
-        self.srv = TarantoolServer()
-        self.srv.script = 'test/suites/box.lua'
-        self.srv.start()
-        self.con = tarantool.Connection(self.srv.host, self.srv.args['primary'])
+        cls.srv = TarantoolServer()
+        cls.srv.script = 'test/suites/box.lua'
+        cls.srv.start()
+        cls.con = tarantool.Connection(cls.srv.host, cls.srv.args['primary'])
+
+        # grant full access to guest
+        resp = cls.srv.admin("""
+            box.schema.user.grant('guest', 'create,read,write,execute', 'universe',
+                                  nil, {if_not_exists = true})
+            return true
+        """)
+        assert_admin_success(resp)
 
     @skip_or_run_sql_test
     def setUp(self):
@@ -34,18 +48,14 @@ def setUp(self):
             self.srv.touch_lock()
         self.con.flush_schema()
 
-        # grant full access to guest
-        self.srv.admin("box.schema.user.grant('guest', 'create,read,write,"
-                       "execute', 'universe')")
-
     @classmethod
-    def tearDownClass(self):
-        self.con.close()
-        self.srv.stop()
-        self.srv.clean()
+    def tearDownClass(cls):
+        cls.con.close()
+        cls.srv.stop()
+        cls.srv.clean()
 
     def _populate_data(self, table_name):
-        query = "insert into %s values (:id, :name)" % table_name
+        query = f"insert into {table_name} values (:id, :name)"
         for param in self.dml_params:
             self.con.execute(query, param)
 
@@ -59,7 +69,7 @@ def test_dml_response(self):
         self.assertEqual(response.affected_row_count, 1)
         self.assertEqual(response.data, None)
 
-        query = "insert into %s values (:id, :name)" % table_name
+        query = f"insert into {table_name} values (:id, :name)"
 
         for num, param in enumerate(self.dml_params, start=1):
             response = self.con.execute(query, param)
@@ -67,7 +77,7 @@ def test_dml_response(self):
             self.assertEqual(response.affected_row_count, 1)
             self.assertEqual(response.data, None)
 
-        query = "delete from %s where id in (4, 5)" % table_name
+        query = f"delete from {table_name} where id in (4, 5)"
         response = self.con.execute(query)
         self.assertEqual(response.autoincrement_ids, None)
         self.assertEqual(response.affected_row_count, 2)
@@ -78,7 +88,7 @@ def test_dql_response(self):
         self._create_table(table_name)
         self._populate_data(table_name)
 
-        select_query = "select name from %s where id in (1, 3, 5)" % table_name
+        select_query = f"select name from {table_name} where id in (1, 3, 5)"
         response = self.con.execute(select_query)
         self.assertEqual(response.autoincrement_ids, None)
         self.assertEqual(response.affected_row_count, None)
diff --git a/test/suites/test_interval.py b/test/suites/test_interval.py
index 2252ebe8..2b6f6abe 100644
--- a/test/suites/test_interval.py
+++ b/test/suites/test_interval.py
@@ -1,40 +1,57 @@
+"""
+This module tests work with datetime interval type.
+"""
+# pylint: disable=missing-class-docstring,missing-function-docstring,protected-access,too-many-function-args,duplicate-code
+
 import re
 import sys
 import unittest
+
 import msgpack
-import warnings
-import tarantool
-import pandas
-import pytz
 
+import tarantool
+from tarantool.error import MsgpackError
 from tarantool.msgpack_ext.packer import default as packer_default
 from tarantool.msgpack_ext.unpacker import ext_hook as unpacker_ext_hook
+from tarantool.msgpack_ext.types.interval import (
+    MAX_YEAR_RANGE,
+    MAX_MONTH_RANGE,
+    MAX_WEEK_RANGE,
+    MAX_DAY_RANGE,
+    MAX_HOUR_RANGE,
+    MAX_MIN_RANGE,
+    MAX_SEC_RANGE,
+    MAX_NSEC_RANGE,
+)
 
 from .lib.tarantool_server import TarantoolServer
 from .lib.skip import skip_or_run_datetime_test
-from tarantool.error import MsgpackError
+from .utils import assert_admin_success
+
 
-class TestSuite_Interval(unittest.TestCase):
+class TestSuiteInterval(unittest.TestCase):
     @classmethod
-    def setUpClass(self):
+    def setUpClass(cls):
         print(' INTERVAL EXT TYPE '.center(70, '='), file=sys.stderr)
         print('-' * 70, file=sys.stderr)
-        self.srv = TarantoolServer()
-        self.srv.script = 'test/suites/box.lua'
-        self.srv.start()
+        cls.srv = TarantoolServer()
+        cls.srv.script = 'test/suites/box.lua'
+        cls.srv.start()
 
-        self.adm = self.srv.admin
-        self.adm(r"""
+        cls.adm = cls.srv.admin
+        resp = cls.adm("""
             _, datetime = pcall(require, 'datetime')
 
-            box.schema.space.create('test')
+            box.schema.space.create('test', {if_not_exists = true})
             box.space['test']:create_index('primary', {
                 type = 'tree',
                 parts = {1, 'string'},
-                unique = true})
+                unique = true,
+                if_not_exists = true})
 
             box.schema.user.create('test', {password = 'test', if_not_exists = true})
-            box.schema.user.grant('test', 'read,write,execute', 'universe')
+            box.schema.user.grant('test', 'read,write,execute', 'universe',
+                                  nil, {if_not_exists = true})
 
             local function add(arg1, arg2)
                 return arg1 + arg2
@@ -45,19 +62,26 @@ def setUpClass(self):
                 return arg1 - arg2
             end
             rawset(_G, 'sub', sub)
+
+            return true
         """)
+        assert_admin_success(resp)
 
-        self.con = tarantool.Connection(self.srv.host, self.srv.args['primary'],
-                                        user='test', password='test')
+        cls.con = tarantool.Connection(cls.srv.host, cls.srv.args['primary'],
+                                       user='test', password='test')
 
     def setUp(self):
         # prevent a remote tarantool from clean our session
         if self.srv.is_started():
             self.srv.touch_lock()
 
-        self.adm("box.space['test']:truncate()")
+        resp = self.adm("""
+            box.space['test']:truncate()
+            return true
+        """)
+        assert_admin_success(resp)
 
-    def test_Interval_positional_init(self):
+    def test_interval_positional_init(self):
         self.assertRaisesRegex(
             TypeError, re.escape('__init__() takes 1 positional argument but 2 were given'),
             lambda: tarantool.Interval(1))
@@ -67,101 +91,408 @@ def test_Interval_positional_init(self):
             'python': tarantool.Interval(year=1),
             'msgpack': (b'\x02\x00\x01\x08\x01'),
             'tarantool': r"datetime.interval.new({year=1})",
+            'str': 'tarantool.Interval(year=1, month=0, week=0, day=0, hour=0, '
+                   'minute=0, sec=0, nsec=0, adjust=Adjust.NONE)',
         },
         'big_year': {
             'python': tarantool.Interval(year=1000),
             'msgpack': (b'\x02\x00\xcd\x03\xe8\x08\x01'),
             'tarantool': r"datetime.interval.new({year=1000})",
+            'str': 'tarantool.Interval(year=1000, month=0, week=0, day=0, hour=0, '
+                   'minute=0, sec=0, nsec=0, adjust=Adjust.NONE)',
         },
         'date': {
             'python': tarantool.Interval(year=1, month=2, day=3),
             'msgpack': (b'\x04\x00\x01\x01\x02\x03\x03\x08\x01'),
             'tarantool': r"datetime.interval.new({year=1, month=2, day=3})",
+            'str': 'tarantool.Interval(year=1, month=2, week=0, day=3, hour=0, '
+                   'minute=0, sec=0, nsec=0, adjust=Adjust.NONE)',
         },
         'big_month_date': {
             'python': tarantool.Interval(year=1, month=100000, day=3),
             'msgpack': (b'\x04\x00\x01\x01\xce\x00\x01\x86\xa0\x03\x03\x08\x01'),
             'tarantool': r"datetime.interval.new({year=1, month=100000, day=3})",
+            'str': 'tarantool.Interval(year=1, month=100000, week=0, day=3, hour=0, '
+                   'minute=0, sec=0, nsec=0, adjust=Adjust.NONE)',
         },
         'time': {
             'python': tarantool.Interval(hour=1, minute=2, sec=3),
             'msgpack': (b'\x04\x04\x01\x05\x02\x06\x03\x08\x01'),
             'tarantool': r"datetime.interval.new({hour=1, min=2, sec=3})",
+            'str': 'tarantool.Interval(year=0, month=0, week=0, day=0, hour=1, '
+                   'minute=2, sec=3, nsec=0, adjust=Adjust.NONE)',
         },
         'big_seconds_time': {
             'python': tarantool.Interval(hour=1, minute=2, sec=3000),
             'msgpack': (b'\x04\x04\x01\x05\x02\x06\xcd\x0b\xb8\x08\x01'),
             'tarantool': r"datetime.interval.new({hour=1, min=2, sec=3000})",
+            'str': 'tarantool.Interval(year=0, month=0, week=0, day=0, hour=1, '
+                   'minute=2, sec=3000, nsec=0, adjust=Adjust.NONE)',
         },
         'datetime': {
             'python': tarantool.Interval(year=1, month=2, day=3, hour=1, minute=2, sec=3000),
             'msgpack': (b'\x07\x00\x01\x01\x02\x03\x03\x04\x01\x05\x02\x06\xcd\x0b\xb8\x08\x01'),
-            'tarantool': r"datetime.interval.new({year=1, month=2, day=3, hour=1, min=2, sec=3000})",
+            'tarantool': r"datetime.interval.new({year=1, month=2, day=3, hour=1, "
+                         r"min=2, sec=3000})",
+            'str': 'tarantool.Interval(year=1, month=2, week=0, day=3, hour=1, '
+                   'minute=2, sec=3000, nsec=0, adjust=Adjust.NONE)',
         },
         'nanoseconds': {
             'python': tarantool.Interval(nsec=10000000),
             'msgpack': (b'\x02\x07\xce\x00\x98\x96\x80\x08\x01'),
             'tarantool': r"datetime.interval.new({nsec=10000000})",
+            'str': 'tarantool.Interval(year=0, month=0, week=0, day=0, hour=0, '
+                   'minute=0, sec=0, nsec=10000000, adjust=Adjust.NONE)',
         },
         'datetime_with_nanoseconds': {
             'python': tarantool.Interval(year=1, month=2, day=3, hour=1, minute=2,
                                          sec=3000, nsec=10000000),
-            'msgpack': (b'\x08\x00\x01\x01\x02\x03\x03\x04\x01\x05\x02\x06\xcd\x0b\xb8\x07\xce' +
+            'msgpack': (b'\x08\x00\x01\x01\x02\x03\x03\x04\x01\x05\x02\x06\xcd\x0b\xb8\x07\xce'
                         b'\x00\x98\x96\x80\x08\x01'),
-            'tarantool': r"datetime.interval.new({year=1, month=2, day=3, hour=1, " +
+            'tarantool': r"datetime.interval.new({year=1, month=2, day=3, hour=1, "
                          r"min=2, sec=3000, nsec=10000000})",
+            'str': 'tarantool.Interval(year=1, month=2, week=0, day=3, hour=1, '
+                   'minute=2, sec=3000, nsec=10000000, adjust=Adjust.NONE)',
         },
         'datetime_none_adjust': {
             'python': tarantool.Interval(year=1, month=2, day=3, hour=1, minute=2,
                                          sec=3000, nsec=10000000,
                                          adjust=tarantool.IntervalAdjust.NONE),
-            'msgpack': (b'\x08\x00\x01\x01\x02\x03\x03\x04\x01\x05\x02\x06\xcd\x0b\xb8\x07\xce' +
+            'msgpack': (b'\x08\x00\x01\x01\x02\x03\x03\x04\x01\x05\x02\x06\xcd\x0b\xb8\x07\xce'
                         b'\x00\x98\x96\x80\x08\x01'),
-            'tarantool': r"datetime.interval.new({year=1, month=2, day=3, hour=1, " +
+            'tarantool': r"datetime.interval.new({year=1, month=2, day=3, hour=1, "
                          r"min=2, sec=3000, nsec=10000000, adjust='none'})",
+            'str': 'tarantool.Interval(year=1, month=2, week=0, day=3, hour=1, '
+                   'minute=2, sec=3000, nsec=10000000, adjust=Adjust.NONE)',
         },
         'datetime_excess_adjust': {
             'python': tarantool.Interval(year=1, month=2, day=3, hour=1, minute=2,
                                          sec=3000, nsec=10000000,
                                          adjust=tarantool.IntervalAdjust.EXCESS),
-            'msgpack': (b'\x07\x00\x01\x01\x02\x03\x03\x04\x01\x05\x02\x06\xcd\x0b\xb8\x07\xce' +
+            'msgpack': (b'\x07\x00\x01\x01\x02\x03\x03\x04\x01\x05\x02\x06\xcd\x0b\xb8\x07\xce'
                         b'\x00\x98\x96\x80'),
-            'tarantool': r"datetime.interval.new({year=1, month=2, day=3, hour=1, " +
+            'tarantool': r"datetime.interval.new({year=1, month=2, day=3, hour=1, "
                          r"min=2, sec=3000, nsec=10000000, adjust='excess'})",
+            'str': 'tarantool.Interval(year=1, month=2, week=0, day=3, hour=1, '
+                   'minute=2, sec=3000, nsec=10000000, adjust=Adjust.EXCESS)',
         },
         'datetime_last_adjust': {
             'python': tarantool.Interval(year=1, month=2, day=3, hour=1, minute=2,
                                          sec=3000, nsec=10000000,
                                          adjust=tarantool.IntervalAdjust.LAST),
-            'msgpack': (b'\x08\x00\x01\x01\x02\x03\x03\x04\x01\x05\x02\x06\xcd\x0b\xb8\x07\xce' +
+            'msgpack': (b'\x08\x00\x01\x01\x02\x03\x03\x04\x01\x05\x02\x06\xcd\x0b\xb8\x07\xce'
                         b'\x00\x98\x96\x80\x08\x02'),
-            'tarantool': r"datetime.interval.new({year=1, month=2, day=3, hour=1, " +
+            'tarantool': r"datetime.interval.new({year=1, month=2, day=3, hour=1, "
                          r"min=2, sec=3000, nsec=10000000, adjust='last'})",
+            'str': 'tarantool.Interval(year=1, month=2, week=0, day=3, hour=1, '
+                   'minute=2, sec=3000, nsec=10000000, adjust=Adjust.LAST)',
         },
         'all_zeroes': {
             'python': tarantool.Interval(adjust=tarantool.IntervalAdjust.EXCESS),
             'msgpack': (b'\x00'),
             'tarantool': r"datetime.interval.new({adjust='excess'})",
+            'str': 'tarantool.Interval(year=0, month=0, week=0, day=0, hour=0, '
+                   'minute=0, sec=0, nsec=0, adjust=Adjust.EXCESS)',
+        },
+        'weeks': {
+            'python': tarantool.Interval(week=3),
+            'msgpack': (b'\x02\x02\x03\x08\x01'),
+            'tarantool': r"datetime.interval.new({week=3})",
+            'str': 'tarantool.Interval(year=0, month=0, week=3, day=0, hour=0, '
+                   'minute=0, sec=0, nsec=0, adjust=Adjust.NONE)',
+        },
+        'date_with_week': {
+            'python': tarantool.Interval(year=1, month=2, week=3, day=4),
+            'msgpack': (b'\x05\x00\x01\x01\x02\x02\x03\x03\x04\x08\x01'),
+            'tarantool': r"datetime.interval.new({year=1, month=2, week=3, day=4})",
+            'str': 'tarantool.Interval(year=1, month=2, week=3, day=4, hour=0, '
+                   'minute=0, sec=0, nsec=0, adjust=Adjust.NONE)',
+        },
+        'datetime_with_week': {
+            'python': tarantool.Interval(year=1, month=2, week=3, day=4, hour=1, minute=2,
+                                         sec=3000, nsec=10000000),
+            'msgpack': (b'\x09\x00\x01\x01\x02\x02\x03\x03\x04\x04\x01\x05\x02\x06\xcd\x0b\xb8'
+                        b'\x07\xce\x00\x98\x96\x80\x08\x01'),
+            'tarantool': r"datetime.interval.new({year=1, month=2, week=3, day=4, hour=1, "
+                         r"min=2, sec=3000, nsec=10000000})",
+            'str': 'tarantool.Interval(year=1, month=2, week=3, day=4, hour=1, '
+                   'minute=2, sec=3000, nsec=10000000, adjust=Adjust.NONE)',
+        },
+        'min_year_interval': {
+            'python': tarantool.Interval(year=-int(MAX_YEAR_RANGE)),
+            'msgpack': (b'\x02\x00\xd2\xff\x4c\x91\x8b\x08\x01'),
+            # Reason why Tarantool datetime is so weird here:
+            # https://github.com/tarantool/tarantool/issues/8878
+            # Replace with f"datetime.interval.new({{year=-{int(MAX_YEAR_RANGE)}}})
+            # after fix.
+            'tarantool': f"datetime.interval.new({{year=-{int(MAX_YEAR_RANGE)} + 1}}) - "
+                         r"datetime.interval.new({year=1})",
+            'str': f'tarantool.Interval(year=-{int(MAX_YEAR_RANGE)}, month=0, week=0, day=0, '
+                   'hour=0, minute=0, sec=0, nsec=0, adjust=Adjust.NONE)',
+        },
+        'max_year_interval': {
+            'python': tarantool.Interval(year=int(MAX_YEAR_RANGE)),
+            'msgpack': (b'\x02\x00\xce\x00\xb3\x6e\x75\x08\x01'),
+            # Reason why Tarantool datetime is so weird here:
+            # https://github.com/tarantool/tarantool/issues/8878
+            # Replace with f"datetime.interval.new({{year={int(MAX_YEAR_RANGE)}}})
+            # after fix.
+            'tarantool': f"datetime.interval.new({{year={int(MAX_YEAR_RANGE)} - 1}}) + "
+                         r"datetime.interval.new({year=1})",
+            'str': f'tarantool.Interval(year={int(MAX_YEAR_RANGE)}, month=0, week=0, day=0, '
+                   'hour=0, minute=0, sec=0, nsec=0, adjust=Adjust.NONE)',
+        },
+        'min_month_interval': {
+            'python': tarantool.Interval(month=-int(MAX_MONTH_RANGE)),
+            'msgpack': (b'\x02\x01\xd2\xf7\x96\xd2\x84\x08\x01'),
+            # Reason why Tarantool datetime is so weird here:
+            # https://github.com/tarantool/tarantool/issues/8878
+            # Replace with f"datetime.interval.new({{month=-{int(MAX_MONTH_RANGE)}}})
+            # after fix.
+            'tarantool': f"datetime.interval.new({{month=-{int(MAX_MONTH_RANGE)} + 1}}) - "
+                         r"datetime.interval.new({month=1})",
+            'str': f'tarantool.Interval(year=0, month=-{int(MAX_MONTH_RANGE)}, week=0, day=0, '
+                   'hour=0, minute=0, sec=0, nsec=0, adjust=Adjust.NONE)',
+        },
+        'max_month_interval': {
+            'python': tarantool.Interval(month=int(MAX_MONTH_RANGE)),
+            'msgpack': (b'\x02\x01\xce\x08\x69\x2d\x7c\x08\x01'),
+            # Reason why Tarantool datetime is so weird here:
+            # https://github.com/tarantool/tarantool/issues/8878
+            # Replace with f"datetime.interval.new({{month={int(MAX_MONTH_RANGE)}}})
+            # after fix.
+            'tarantool': f"datetime.interval.new({{month={int(MAX_MONTH_RANGE)} - 1}}) + "
+                         r"datetime.interval.new({month=1})",
+            'str': f'tarantool.Interval(year=0, month={int(MAX_MONTH_RANGE)}, week=0, day=0, '
+                   'hour=0, minute=0, sec=0, nsec=0, adjust=Adjust.NONE)',
+        },
+        'min_week_interval': {
+            'python': tarantool.Interval(week=-int(MAX_WEEK_RANGE)),
+            'msgpack': (b'\x02\x02\xd2\xdb\x6d\x85\xa8\x08\x01'),
+            # Reason why Tarantool datetime is so weird here:
+            # https://github.com/tarantool/tarantool/issues/8878
+            # Replace with f"datetime.interval.new({{week=-{int(MAX_WEEK_RANGE)}}})
+            # after fix.
+            'tarantool': f"datetime.interval.new({{week=-{int(MAX_WEEK_RANGE)} + 1}}) - "
+                         r"datetime.interval.new({week=1})",
+            'str': f'tarantool.Interval(year=0, month=0, week=-{int(MAX_WEEK_RANGE)}, day=0, '
+                   'hour=0, minute=0, sec=0, nsec=0, adjust=Adjust.NONE)',
+        },
+        'max_week_interval': {
+            'python': tarantool.Interval(week=int(MAX_WEEK_RANGE)),
+            'msgpack': (b'\x02\x02\xce\x24\x92\x7a\x58\x08\x01'),
+            # Reason why Tarantool datetime is so weird here:
+            # https://github.com/tarantool/tarantool/issues/8878
+            # Replace with f"datetime.interval.new({{week={int(MAX_WEEK_RANGE)}}})
+            # after fix.
+            'tarantool': f"datetime.interval.new({{week={int(MAX_WEEK_RANGE)} - 1}}) + "
+                         r"datetime.interval.new({week=1})",
+            'str': f'tarantool.Interval(year=0, month=0, week={int(MAX_WEEK_RANGE)}, day=0, '
+                   'hour=0, minute=0, sec=0, nsec=0, adjust=Adjust.NONE)',
+        },
+        'min_day_interval': {
+            'python': tarantool.Interval(day=-int(MAX_DAY_RANGE)),
+            'msgpack': (b'\x02\x03\xd3\xff\xff\xff\xfe\xff\xfe\xa7\x92\x08\x01'),
+            # Reason why Tarantool datetime is so weird here:
+            # https://github.com/tarantool/tarantool/issues/8878
+            # Replace with f"datetime.interval.new({{day=-{int(MAX_DAY_RANGE)}}})
+            # after fix.
+            'tarantool': f"datetime.interval.new({{day=-{int(MAX_DAY_RANGE)} + 1}}) - "
+                         r"datetime.interval.new({day=1})",
+            'str': f'tarantool.Interval(year=0, month=0, week=0, day=-{int(MAX_DAY_RANGE)}, '
+                   'hour=0, minute=0, sec=0, nsec=0, adjust=Adjust.NONE)',
+            'tarantool_8887_issue': True,
+        },
+        'max_day_interval': {
+            'python': tarantool.Interval(day=int(MAX_DAY_RANGE)),
+            'msgpack': (b'\x02\x03\xcf\x00\x00\x00\x01\x00\x01\x58\x6e\x08\x01'),
+            # Reason why Tarantool datetime is so weird here:
+            # https://github.com/tarantool/tarantool/issues/8878
+            # Replace with f"datetime.interval.new({{day={int(MAX_DAY_RANGE)}}})
+            # after fix.
+            'tarantool': f"datetime.interval.new({{day={int(MAX_DAY_RANGE)} - 1}}) + "
+                         r"datetime.interval.new({day=1})",
+            'str': f'tarantool.Interval(year=0, month=0, week=0, day={int(MAX_DAY_RANGE)}, hour=0, '
+                   'minute=0, sec=0, nsec=0, adjust=Adjust.NONE)',
+            'tarantool_8887_issue': True,
+        },
+        'min_int32_day_interval': {
+            'python': tarantool.Interval(day=-2147483648),
+            'msgpack': (b'\x02\x03\xd2\x80\x00\x00\x00\x08\x01'),
+            'tarantool': r"datetime.interval.new({day=-2147483648})",
+            'str': 'tarantool.Interval(year=0, month=0, week=0, day=-2147483648, hour=0, '
+                   'minute=0, sec=0, nsec=0, adjust=Adjust.NONE)',
+        },
+        'max_int32_day_interval': {
+            'python': tarantool.Interval(day=2147483647),
+            'msgpack': (b'\x02\x03\xce\x7f\xff\xff\xff\x08\x01'),
+            'tarantool': r"datetime.interval.new({day=2147483647})",
+            'str': 'tarantool.Interval(year=0, month=0, week=0, day=2147483647, hour=0, '
+                   'minute=0, sec=0, nsec=0, adjust=Adjust.NONE)',
+        },
+        'min_hour_interval': {
+            'python': tarantool.Interval(hour=-int(MAX_HOUR_RANGE)),
+            'msgpack': (b'\x02\x04\xd3\xff\xff\xff\xe7\xff\xdf\xb5\xaa\x08\x01'),
+            # Reason why Tarantool datetime is so weird here:
+            # https://github.com/tarantool/tarantool/issues/8878
+            # Replace with f"datetime.interval.new({{hour=-{int(MAX_HOUR_RANGE)}}})
+            # after fix.
+            'tarantool': f"datetime.interval.new({{hour=-{int(MAX_HOUR_RANGE)} + 1}}) - "
+                         r"datetime.interval.new({hour=1})",
+            'str': 'tarantool.Interval(year=0, month=0, week=0, day=0, '
+                   f'hour=-{int(MAX_HOUR_RANGE)}, minute=0, sec=0, nsec=0, adjust=Adjust.NONE)',
+            'tarantool_8887_issue': True,
+        },
+        'max_hour_interval': {
+            'python': tarantool.Interval(hour=int(MAX_HOUR_RANGE)),
+            'msgpack': (b'\x02\x04\xcf\x00\x00\x00\x18\x00\x20\x4a\x56\x08\x01'),
+            # Reason why Tarantool datetime is so weird here:
+            # https://github.com/tarantool/tarantool/issues/8878
+            # Replace with f"datetime.interval.new({{hour={int(MAX_HOUR_RANGE)}}})
+            # after fix.
+            'tarantool': f"datetime.interval.new({{hour={int(MAX_HOUR_RANGE)} - 1}}) + "
+                         r"datetime.interval.new({hour=1})",
+            'str': 'tarantool.Interval(year=0, month=0, week=0, day=0, '
+                   f'hour={int(MAX_HOUR_RANGE)}, minute=0, sec=0, nsec=0, adjust=Adjust.NONE)',
+            'tarantool_8887_issue': True,
+        },
+        'min_int32_hour_interval': {
+            'python': tarantool.Interval(hour=-2147483648),
+            'msgpack': (b'\x02\x04\xd2\x80\x00\x00\x00\x08\x01'),
+            'tarantool': r"datetime.interval.new({hour=-2147483648})",
+            'str': 'tarantool.Interval(year=0, month=0, week=0, day=0, hour=-2147483648, '
+                   'minute=0, sec=0, nsec=0, adjust=Adjust.NONE)',
+        },
+        'max_int32_hour_interval': {
+            'python': tarantool.Interval(hour=2147483647),
+            'msgpack': (b'\x02\x04\xce\x7f\xff\xff\xff\x08\x01'),
+            'tarantool': r"datetime.interval.new({hour=2147483647})",
+            'str': 'tarantool.Interval(year=0, month=0, week=0, day=0, hour=2147483647, '
+                   'minute=0, sec=0, nsec=0, adjust=Adjust.NONE)',
+        },
+        'min_minute_interval': {
+            'python': tarantool.Interval(minute=-int(MAX_MIN_RANGE)),
+            'msgpack': (b'\x02\x05\xd3\xff\xff\xfa\x5f\xf8\x6e\x93\xd8\x08\x01'),
+            # Reason why Tarantool datetime is so weird here:
+            # https://github.com/tarantool/tarantool/issues/8878
+            # Replace with f"datetime.interval.new({{min=-{int(MAX_MIN_RANGE)}}})
+            # after fix.
+            'tarantool': f"datetime.interval.new({{min=-{int(MAX_MIN_RANGE)} + 1}}) - "
+                         r"datetime.interval.new({min=1})",
+            'str': 'tarantool.Interval(year=0, month=0, week=0, day=0, hour=0, '
+                   f'minute=-{int(MAX_MIN_RANGE)}, sec=0, nsec=0, adjust=Adjust.NONE)',
+            'tarantool_8887_issue': True,
+        },
+        'max_minute_interval': {
+            'python': tarantool.Interval(minute=int(MAX_MIN_RANGE)),
+            'msgpack': (b'\x02\x05\xcf\x00\x00\x05\xa0\x07\x91\x6c\x28\x08\x01'),
+            # Reason why Tarantool datetime is so weird here:
+            # https://github.com/tarantool/tarantool/issues/8878
+            # Replace with f"datetime.interval.new({{min={int(MAX_MIN_RANGE)}}})
+            # after fix.
+            'tarantool': f"datetime.interval.new({{min={int(MAX_MIN_RANGE)} - 1}}) + "
+                         r"datetime.interval.new({min=1})",
+            'str': 'tarantool.Interval(year=0, month=0, week=0, day=0, hour=0, '
+                   f'minute={int(MAX_MIN_RANGE)}, sec=0, nsec=0, adjust=Adjust.NONE)',
+            'tarantool_8887_issue': True,
+        },
+        'min_int32_minute_interval': {
+            'python': tarantool.Interval(minute=-2147483648),
+            'msgpack': (b'\x02\x05\xd2\x80\x00\x00\x00\x08\x01'),
+            'tarantool': r"datetime.interval.new({min=-2147483648})",
+            'str': 'tarantool.Interval(year=0, month=0, week=0, day=0, hour=0, '
+                   'minute=-2147483648, sec=0, nsec=0, adjust=Adjust.NONE)',
+        },
+        'max_int32_minute_interval': {
+            'python': tarantool.Interval(minute=2147483647),
+            'msgpack': (b'\x02\x05\xce\x7f\xff\xff\xff\x08\x01'),
+            'tarantool': r"datetime.interval.new({min=2147483647})",
+            'str': 'tarantool.Interval(year=0, month=0, week=0, day=0, hour=0, '
+                   'minute=2147483647, sec=0, nsec=0, adjust=Adjust.NONE)',
+        },
+        'min_sec_interval': {
+            'python': tarantool.Interval(sec=-int(MAX_SEC_RANGE)),
+            'msgpack': (b'\x02\x06\xd3\xff\xfe\xae\x7e\x39\xea\xa6\xa0\x08\x01'),
+            # Reason why Tarantool datetime is so weird here:
+            # https://github.com/tarantool/tarantool/issues/8878
+            # Replace with f"datetime.interval.new({{sec=-{int(MAX_SEC_RANGE)}}})
+            # after fix.
+            'tarantool': f"datetime.interval.new({{sec=-{int(MAX_SEC_RANGE)} + 1}}) - "
+                         r"datetime.interval.new({sec=1})",
+            'str': 'tarantool.Interval(year=0, month=0, week=0, day=0, hour=0, '
+                   f'minute=0, sec=-{int(MAX_SEC_RANGE)}, nsec=0, adjust=Adjust.NONE)',
+            'tarantool_8887_issue': True,
+        },
+        'max_sec_interval': {
+            'python': tarantool.Interval(sec=int(MAX_SEC_RANGE)),
+            'msgpack': (b'\x02\x06\xcf\x00\x01\x51\x81\xc6\x15\x59\x60\x08\x01'),
+            # Reason why Tarantool datetime is so weird here:
+            # https://github.com/tarantool/tarantool/issues/8878
+            # Replace with f"datetime.interval.new({{sec={int(MAX_SEC_RANGE)}}})
+            # after fix.
+            'tarantool': f"datetime.interval.new({{sec={int(MAX_SEC_RANGE)} - 1}}) + "
+                         r"datetime.interval.new({sec=1})",
+            'str': 'tarantool.Interval(year=0, month=0, week=0, day=0, hour=0, '
+                   f'minute=0, sec={int(MAX_SEC_RANGE)}, nsec=0, adjust=Adjust.NONE)',
+            'tarantool_8887_issue': True,
+        },
+        'min_int32_sec_interval': {
+            'python': tarantool.Interval(sec=-2147483648),
+            'msgpack': (b'\x02\x06\xd2\x80\x00\x00\x00\x08\x01'),
+            'tarantool': r"datetime.interval.new({sec=-2147483648})",
+            'str': 'tarantool.Interval(year=0, month=0, week=0, day=0, hour=0, '
+                   'minute=0, sec=-2147483648, nsec=0, adjust=Adjust.NONE)',
+        },
+        'max_int32_sec_interval': {
+            'python': tarantool.Interval(sec=2147483647),
+            'msgpack': (b'\x02\x06\xce\x7f\xff\xff\xff\x08\x01'),
+            'tarantool': r"datetime.interval.new({sec=2147483647})",
+            'str': 'tarantool.Interval(year=0, month=0, week=0, day=0, hour=0, '
+                   'minute=0, sec=2147483647, nsec=0, adjust=Adjust.NONE)',
+        },
+        'min_nsec_interval': {
+            'python': tarantool.Interval(nsec=-int(MAX_NSEC_RANGE)),
+            'msgpack': (b'\x02\x07\xd2\x80\x00\x00\x01\x08\x01'),
+            # Reason why Tarantool datetime is so weird here:
+            # https://github.com/tarantool/tarantool/issues/8878
+            # Replace with f"datetime.interval.new({{nsec=-{int(MAX_NSEC_RANGE)}}})
+            # after fix.
+            'tarantool': f"datetime.interval.new({{nsec=-{int(MAX_NSEC_RANGE)} + 1}}) - "
+                         r"datetime.interval.new({nsec=1})",
+            'str': 'tarantool.Interval(year=0, month=0, week=0, day=0, hour=0, '
+                   f'minute=0, sec=0, nsec=-{int(MAX_NSEC_RANGE)}, adjust=Adjust.NONE)',
+        },
+        'max_nsec_interval': {
+            'python': tarantool.Interval(nsec=int(MAX_NSEC_RANGE)),
+            'msgpack': (b'\x02\x07\xce\x7f\xff\xff\xff\x08\x01'),
+            # Reason why Tarantool datetime is so weird here:
+            # https://github.com/tarantool/tarantool/issues/8878
+            # Replace with f"datetime.interval.new({{nsec={int(MAX_NSEC_RANGE)}}})
+            # after fix.
+            'tarantool': f"datetime.interval.new({{nsec={int(MAX_NSEC_RANGE)} - 1}}) + "
+                         r"datetime.interval.new({nsec=1})",
+            'str': 'tarantool.Interval(year=0, month=0, week=0, day=0, hour=0, '
+                   f'minute=0, sec=0, nsec={int(MAX_NSEC_RANGE)}, adjust=Adjust.NONE)',
         },
     }
 
     def test_msgpack_decode(self):
-        for name in self.cases.keys():
+        for name, case in self.cases.items():
             with self.subTest(msg=name):
-                case = self.cases[name]
-
-                self.assertEqual(unpacker_ext_hook(
-                                    6,
-                                    case['msgpack'],
-                                    self.con._unpacker_factory(),
-                                 ),
-                                 case['python'])
+                self.assertEqual(
+                    unpacker_ext_hook(
+                        6,
+                        case['msgpack'],
+                        self.con._unpacker_factory(),
+                    ),
+                    case['python'])
 
     @skip_or_run_datetime_test
     def test_tarantool_decode(self):
-        for name in self.cases.keys():
+        for name, case in self.cases.items():
             with self.subTest(msg=name):
-                case = self.cases[name]
+                if ('tarantool_8887_issue' in case) and (case['tarantool_8887_issue'] is True):
+                    self.skipTest('See https://github.com/tarantool/tarantool/issues/8887')
 
                 self.adm(f"box.space['test']:replace{{'{name}', {case['tarantool']}, 'field'}}")
 
@@ -169,24 +500,23 @@ def test_tarantool_decode(self):
                                          [[name, case['python'], 'field']])
 
     def test_msgpack_encode(self):
-        for name in self.cases.keys():
+        for name, case in self.cases.items():
             with self.subTest(msg=name):
-                case = self.cases[name]
-
                 self.assertEqual(packer_default(case['python']),
                                  msgpack.ExtType(code=6, data=case['msgpack']))
 
     @skip_or_run_datetime_test
     def test_tarantool_encode(self):
-        for name in self.cases.keys():
+        for name, case in self.cases.items():
             with self.subTest(msg=name):
-                case = self.cases[name]
+                if ('tarantool_8887_issue' in case) and (case['tarantool_8887_issue'] is True):
+                    self.skipTest('See https://github.com/tarantool/tarantool/issues/8887')
 
                 self.con.insert('test', [name, case['python'], 'field'])
 
                 lua_eval = f"""
                     local interval = {case['tarantool']}
-                    
+
                     local tuple = box.space['test']:get('{name}')
                     assert(tuple ~= nil)
 
@@ -200,6 +530,11 @@ def test_tarantool_encode(self):
 
                 self.assertSequenceEqual(self.adm(lua_eval), [True])
 
+    def test_class_string(self):
+        for name, case in self.cases.items():
+            with self.subTest(msg=name):
+                self.assertEqual(str(case['python']), case['str'])
+                self.assertEqual(repr(case['python']), case['str'])
 
     def test_unknown_field_decode(self):
         case = b'\x01\x09\xce\x00\x98\x96\x80'
@@ -213,6 +548,86 @@ def test_unknown_adjust_decode(self):
             MsgpackError, '3 is not a valid Adjust',
             lambda: unpacker_ext_hook(6, case, self.con._unpacker_factory()))
 
+    out_of_range_cases = {
+        'year_too_small': {
+            'kwargs': {'year': -int(MAX_YEAR_RANGE + 1)},
+            'range': MAX_YEAR_RANGE,
+        },
+        'year_too_large': {
+            'kwargs': {'year': int(MAX_YEAR_RANGE + 1)},
+            'range': MAX_YEAR_RANGE,
+        },
+        'month_too_small': {
+            'kwargs': {'month': -int(MAX_MONTH_RANGE + 1)},
+            'range': MAX_MONTH_RANGE,
+        },
+        'month_too_big': {
+            'kwargs': {'month': int(MAX_MONTH_RANGE + 1)},
+            'range': MAX_MONTH_RANGE,
+        },
+        'week_too_small': {
+            'kwargs': {'week': -int(MAX_WEEK_RANGE + 1)},
+            'range': MAX_WEEK_RANGE,
+        },
+        'week_too_big': {
+            'kwargs': {'week': int(MAX_WEEK_RANGE + 1)},
+            'range': MAX_WEEK_RANGE,
+        },
+        'day_too_small': {
+            'kwargs': {'day': -int(MAX_DAY_RANGE + 1)},
+            'range': MAX_DAY_RANGE,
+        },
+        'day_too_big': {
+            'kwargs': {'day': int(MAX_DAY_RANGE + 1)},
+            'range': MAX_DAY_RANGE,
+        },
+        'hour_too_small': {
+            'kwargs': {'hour': -int(MAX_HOUR_RANGE + 1)},
+            'range': MAX_HOUR_RANGE,
+        },
+        'hour_too_big': {
+            'kwargs': {'hour': int(MAX_HOUR_RANGE + 1)},
+            'range': MAX_HOUR_RANGE,
+        },
+        'minute_too_small': {
+            'kwargs': {'minute': -int(MAX_MIN_RANGE + 1)},
+            'range': MAX_MIN_RANGE,
+        },
+        'minute_too_big': {
+            'kwargs': {'minute': int(MAX_MIN_RANGE + 1)},
+            'range': MAX_MIN_RANGE,
+        },
+        'sec_too_small': {
+            'kwargs': {'sec': -int(MAX_SEC_RANGE + 1)},
+            'range': MAX_SEC_RANGE,
+        },
+        'sec_too_big': {
+            'kwargs': {'sec': int(MAX_SEC_RANGE + 1)},
+            'range': MAX_SEC_RANGE,
+        },
+        'nsec_too_small': {
+            'kwargs': {'nsec': -int(MAX_NSEC_RANGE + 1)},
+            'range': MAX_NSEC_RANGE,
+        },
+        'nsec_too_big': {
+            'kwargs': {'nsec': int(MAX_NSEC_RANGE + 1)},
+            'range': MAX_NSEC_RANGE,
+        },
+    }
+
+    def test_out_of_range(self):
+        # pylint: disable=cell-var-from-loop,unnecessary-lambda
+
+        for name, case in self.out_of_range_cases.items():
+            with self.subTest(msg=name):
+                name = next(iter(case['kwargs']))
+                val = case['kwargs'][name]
+                self.assertRaisesRegex(
+                    ValueError, re.escape(
+                        f"value {val} of {name} is out of "
+                        f"allowed range [{-case['range']}, {case['range']}]"
+                    ),
+                    lambda: tarantool.Interval(**case['kwargs']))
 
     arithmetic_cases = {
         'year': {
@@ -241,9 +656,9 @@ def test_unknown_adjust_decode(self):
         },
         'datetime_with_nsec': {
             'arg_1': tarantool.Interval(year=1, month=2, day=3, hour=1, minute=2,
-                                           sec=3000, nsec=10000000),
+                                        sec=3000, nsec=10000000),
             'arg_2': tarantool.Interval(year=2, month=1, day=31, hour=-3, minute=0,
-                                           sec=1000, nsec=9876543),
+                                        sec=1000, nsec=9876543),
             'res_add': tarantool.Interval(year=3, month=3, day=34, hour=-2, minute=2,
                                           sec=4000, nsec=19876543),
             'res_sub': tarantool.Interval(year=-1, month=1, day=-28, hour=4, minute=2,
@@ -269,43 +684,72 @@ def test_unknown_adjust_decode(self):
             'res_add': tarantool.Interval(year=3, adjust=tarantool.IntervalAdjust.LAST),
             'res_sub': tarantool.Interval(year=1, adjust=tarantool.IntervalAdjust.LAST),
         },
+        'weeks': {
+            'arg_1': tarantool.Interval(week=2),
+            'arg_2': tarantool.Interval(week=1),
+            'res_add': tarantool.Interval(week=3),
+            'res_sub': tarantool.Interval(week=1),
+        },
+        'date_with_week': {
+            'arg_1': tarantool.Interval(year=1, month=2, week=3, day=4),
+            'arg_2': tarantool.Interval(year=4, month=3, week=2, day=1),
+            'res_add': tarantool.Interval(year=5, month=5, week=5, day=5),
+            'res_sub': tarantool.Interval(year=-3, month=-1, week=1, day=3),
+        },
+        'datetime_with_week': {
+            'arg_1': tarantool.Interval(year=1, month=2, week=3, day=4, hour=1, minute=2,
+                                        sec=3000, nsec=10000000),
+            'arg_2': tarantool.Interval(year=2, month=1, week=-1, day=31, hour=-3, minute=0,
+                                        sec=1000, nsec=9876543),
+            'res_add': tarantool.Interval(year=3, month=3, week=2, day=35, hour=-2, minute=2,
+                                          sec=4000, nsec=19876543),
+            'res_sub': tarantool.Interval(year=-1, month=1, week=4, day=-27, hour=4, minute=2,
+                                          sec=2000, nsec=123457),
+        },
     }
 
     def test_python_interval_addition(self):
-        for name in self.arithmetic_cases.keys():
+        for name, case in self.arithmetic_cases.items():
             with self.subTest(msg=name):
-                case = self.arithmetic_cases[name]
-
                 self.assertEqual(case['arg_1'] + case['arg_2'], case['res_add'])
 
     def test_python_interval_subtraction(self):
-        for name in self.arithmetic_cases.keys():
+        for name, case in self.arithmetic_cases.items():
             with self.subTest(msg=name):
-                case = self.arithmetic_cases[name]
-
                 self.assertEqual(case['arg_1'] - case['arg_2'], case['res_sub'])
 
     @skip_or_run_datetime_test
     def test_tarantool_interval_addition(self):
-        for name in self.arithmetic_cases.keys():
+        for name, case in self.arithmetic_cases.items():
             with self.subTest(msg=name):
-                case = self.arithmetic_cases[name]
-
                 self.assertSequenceEqual(self.con.call('add', case['arg_1'], case['arg_2']),
                                          [case['res_add']])
 
     @skip_or_run_datetime_test
     def test_tarantool_interval_subtraction(self):
-        for name in self.arithmetic_cases.keys():
+        for name, case in self.arithmetic_cases.items():
             with self.subTest(msg=name):
-                case = self.arithmetic_cases[name]
-
                 self.assertSequenceEqual(self.con.call('sub', case['arg_1'], case['arg_2']),
                                          [case['res_sub']])
 
+    def test_addition_overflow(self):
+        self.assertRaisesRegex(
+            ValueError, re.escape(
+                f"value {int(MAX_YEAR_RANGE) + 1} of year is out of "
+                f"allowed range [{-MAX_YEAR_RANGE}, {MAX_YEAR_RANGE}]"
+            ),
+            lambda: tarantool.Interval(year=int(MAX_YEAR_RANGE)) + tarantool.Interval(year=1))
+
+    def test_subtraction_overflow(self):
+        self.assertRaisesRegex(
+            ValueError, re.escape(
+                f"value {-int(MAX_YEAR_RANGE) - 1} of year is out of "
+                f"allowed range [{-MAX_YEAR_RANGE}, {MAX_YEAR_RANGE}]"
+            ),
+            lambda: tarantool.Interval(year=-int(MAX_YEAR_RANGE)) - tarantool.Interval(year=1))
 
     @classmethod
-    def tearDownClass(self):
-        self.con.close()
-        self.srv.stop()
-        self.srv.clean()
+    def tearDownClass(cls):
+        cls.con.close()
+        cls.srv.stop()
+        cls.srv.clean()
diff --git a/test/suites/test_mesh.py b/test/suites/test_mesh.py
index ae621bf5..a906597b 100644
--- a/test/suites/test_mesh.py
+++ b/test/suites/test_mesh.py
@@ -1,3 +1,9 @@
+"""
+This module tests work with a cluster of Tarantool servers through
+MeshConnection.
+"""
+# pylint: disable=missing-class-docstring,missing-function-docstring
+
 import sys
 import unittest
 import warnings
@@ -10,46 +16,57 @@
     ClusterDiscoveryWarning,
 )
 from .lib.tarantool_server import TarantoolServer
+from .utils import assert_admin_success
 
 
 def create_server(_id):
     srv = TarantoolServer()
     srv.script = 'test/suites/box.lua'
     srv.start()
-    srv.admin("box.schema.user.create('test', {password = 'test', " +
-              "if_not_exists = true})")
-    srv.admin("box.schema.user.grant('test', 'execute', 'universe')")
+    resp = srv.admin(f"""
+        box.schema.user.create('test', {{password = 'test', if_not_exists = true}})
+        box.schema.user.grant('test', 'execute', 'universe',
+                              nil, {{if_not_exists = true}})
+
+        function srv_id() return {_id} end
 
-    # Create srv_id function (for testing purposes).
-    srv.admin("function srv_id() return %s end" % _id)
+        return true
+    """)
+    assert_admin_success(resp)
     return srv
 
 
 @unittest.skipIf(sys.platform.startswith("win"),
                  'Mesh tests on windows platform are not supported')
-class TestSuite_Mesh(unittest.TestCase):
+class TestSuiteMesh(unittest.TestCase):
+    # pylint: disable=too-many-instance-attributes
+
     def define_cluster_function(self, func_name, servers):
         addresses = [(srv.host, srv.args['primary']) for srv in servers]
-        addresses_lua = ",".join("'%s:%d'" % address for address in addresses)
-        func_body = """
-            function %s()
-                return {%s}
+        addresses_lua = ",".join(f"'{address[0]}:{address[1]}'" for address in addresses)
+        func_body = f"""
+            function {func_name}()
+                return {{{addresses_lua}}}
             end
-        """ % (func_name, addresses_lua)
+            return true
+        """
         for srv in self.servers:
-            srv.admin(func_body)
+            resp = srv.admin(func_body)
+            assert_admin_success(resp)
 
     def define_custom_cluster_function(self, func_name, retval):
-        func_body = """
-            function %s()
-                return %s
+        func_body = f"""
+            function {func_name}()
+                return {retval}
             end
-        """ % (func_name, retval)
+            return true
+        """
         for srv in self.servers:
-            srv.admin(func_body)
+            resp = srv.admin(func_body)
+            assert_admin_success(resp)
 
     @classmethod
-    def setUpClass(self):
+    def setUpClass(cls):
         print(' MESH '.center(70, '='), file=sys.stderr)
         print('-' * 70, file=sys.stderr)
 
@@ -91,7 +108,11 @@ def assert_srv_id(con, srv_id):
             # Start instance#1, stop instance#2 -- response from
             # instance#1 again.
             self.srv.start()
-            self.srv.admin('function srv_id() return 1 end')
+            resp = self.srv.admin("""
+                function srv_id() return 1 end
+                return true
+            """)
+            assert_admin_success(resp)
             self.srv2.stop()
             assert_srv_id(con, 1)
 
@@ -114,7 +135,6 @@ def test_01_contructor(self):
         # Verify that a bad address given at initialization leads
         # to an error.
         bad_addrs = [
-            {"port": 1234},                         # no host
             {"host": "localhost"},                  # no port
             {"host": "localhost", "port": "1234"},  # port is str
         ]
@@ -158,11 +178,11 @@ def test_02_discovery_bad_address(self):
 
                 # Verify that a cluster discovery (that is triggered
                 # by ping) give one or two warnings.
-                with warnings.catch_warnings(record=True) as ws:
+                with warnings.catch_warnings(record=True) as warns:
                     con.ping()
-                    self.assertTrue(len(ws) in (1, 2))
-                    for w in ws:
-                        self.assertIs(w.category, ClusterDiscoveryWarning)
+                    self.assertTrue(len(warns) in (1, 2))
+                    for warn in warns:
+                        self.assertIs(warn.category, ClusterDiscoveryWarning)
 
                 # Verify that incorrect or empty result was discarded.
                 self.assertEqual(len(con.strategy.addrs), 1)
@@ -173,7 +193,7 @@ def test_02_discovery_bad_address(self):
 
     def test_03_discovery_bad_good_addresses(self):
         func_name = 'bad_and_good_addresses'
-        retval = "{'localhost:', '%s:%d'}" % (self.host_2, self.port_2)
+        retval = f"{{'localhost:', '{self.host_2}:{self.port_2}'}}"
         self.define_custom_cluster_function(func_name, retval)
         con = tarantool.MeshConnection(self.host_1, self.port_1,
                                        user='test', password='test')
@@ -182,10 +202,10 @@ def test_03_discovery_bad_good_addresses(self):
 
             # Verify that a cluster discovery (that is triggered
             # by ping) give one warning.
-            with warnings.catch_warnings(record=True) as ws:
+            with warnings.catch_warnings(record=True) as warns:
                 con.ping()
-                self.assertEqual(len(ws), 1)
-                self.assertIs(ws[0].category, ClusterDiscoveryWarning)
+                self.assertEqual(len(warns), 1)
+                self.assertIs(warns[0].category, ClusterDiscoveryWarning)
 
             # Verify that only second address was accepted.
             self.assertEqual(len(con.strategy.addrs), 1)
diff --git a/test/suites/test_package.py b/test/suites/test_package.py
index a136c958..8d13858a 100644
--- a/test/suites/test_package.py
+++ b/test/suites/test_package.py
@@ -1,30 +1,34 @@
+"""
+This module tests package features.
+"""
+# pylint: disable=missing-class-docstring,missing-function-docstring
+
 import os
 import sys
 import unittest
 
+import tarantool
+
 if sys.version_info >= (3, 8):
     from importlib import metadata
 else:
     import importlib_metadata as metadata
 
-import tarantool
-
 
 def is_test_pure_install():
     env = os.getenv("TEST_PURE_INSTALL")
     if env:
         env = env.upper()
-        return env == "1" or env == "TRUE"
+        return env in ("1", "TRUE")
     return False
 
 
-class TestSuite_Package(unittest.TestCase):
+class TestSuitePackage(unittest.TestCase):
     @classmethod
-    def setUpClass(self):
+    def setUpClass(cls):
         print(' PACKAGE '.center(70, '='), file=sys.stderr)
         print('-' * 70, file=sys.stderr)
 
-
     def test_version(self):
         if is_test_pure_install():
             self.assertEqual(tarantool.__version__, metadata.version('tarantool'))
diff --git a/test/suites/test_pool.py b/test/suites/test_pool.py
index f5e27f16..e15bcbbf 100644
--- a/test/suites/test_pool.py
+++ b/test/suites/test_pool.py
@@ -1,3 +1,9 @@
+"""
+This module tests work with a cluster of Tarantool servers through
+ConnectionPool.
+"""
+# pylint: disable=missing-class-docstring,missing-function-docstring,too-many-public-methods,too-many-locals,duplicate-code,bad-option-value,no-self-use
+
 import sys
 import time
 import unittest
@@ -7,7 +13,6 @@
 from tarantool.error import (
     ClusterConnectWarning,
     DatabaseError,
-    NetworkError,
     NetworkWarning,
     PoolTolopogyError,
     PoolTolopogyWarning,
@@ -15,63 +20,79 @@
 
 from .lib.skip import skip_or_run_sql_test
 from .lib.tarantool_server import TarantoolServer
+from .utils import assert_admin_success
 
 
 def create_server(_id):
     srv = TarantoolServer()
     srv.script = 'test/suites/box.lua'
     srv.start()
-    srv.admin("box.schema.user.create('test', {password = 'test', " +
-              "if_not_exists = true})")
-    srv.admin("box.schema.user.grant('test', 'execute', 'universe')")
-    srv.admin("box.schema.space.create('test')")
-    srv.admin(r"box.space.test:format({"
-             +r" { name = 'pk', type = 'string' }," +
-              r" { name = 'id', type = 'number', is_nullable = true }" +
-              r"})")
-    srv.admin(r"box.space.test:create_index('pk'," +
-              r"{ unique = true," +
-              r"  parts = {{field = 1, type = 'string'}}})")
-    srv.admin(r"box.space.test:create_index('id'," +
-              r"{ unique = true," +
-              r"  parts = {{field = 2, type = 'number', is_nullable=true}}})")
-    srv.admin("box.schema.user.grant('test', 'read,write', 'space', 'test')")
-    srv.admin("json = require('json')")
-
-    # Create srv_id function (for testing purposes).
-    srv.admin("function srv_id() return %s end" % _id)
+    resp = srv.admin(f"""
+        box.schema.user.create('test', {{password = 'test', if_not_exists = true}})
+        box.schema.user.grant('test', 'execute', 'universe',
+                              nil, {{if_not_exists = true}})
+        box.schema.space.create('test', {{if_not_exists = true}})
+        box.space.test:format({{
+            {{ name = 'pk', type = 'string' }},
+            {{ name = 'id', type = 'number', is_nullable = true }}
+        }})
+        box.space.test:create_index('pk',
+            {{
+                unique = true,
+                parts = {{
+                    {{field = 1, type = 'string'}}
+                }},
+                if_not_exists = true,
+            }})
+        box.space.test:create_index('id',
+            {{
+                unique = true,
+                parts = {{
+                    {{field = 2, type = 'number', is_nullable=true}}
+                }},
+                if_not_exists = true,
+            }})
+        box.schema.user.grant('test', 'read,write', 'space', 'test', {{if_not_exists = true}})
+        json = require('json')
+
+        function srv_id() return {_id} end
+
+        return true
+    """)
+    assert_admin_success(resp)
     return srv
 
 
 @unittest.skipIf(sys.platform.startswith("win"),
                  'Pool tests on windows platform are not supported')
-class TestSuite_Pool(unittest.TestCase):
+class TestSuitePool(unittest.TestCase):
     def set_ro(self, srv, read_only):
         if read_only:
-            req = r'box.cfg{read_only = true}'
+            req = r'box.cfg{read_only = true}; return true'
         else:
-            req = r'box.cfg{read_only = false}'
+            req = r'box.cfg{read_only = false}; return true'
 
-        srv.admin(req)
+        resp = srv.admin(req)
+        assert_admin_success(resp)
 
     def set_cluster_ro(self, read_only_list):
         assert len(self.servers) == len(read_only_list)
 
-        for i in range(len(self.servers)):
-            self.set_ro(self.servers[i], read_only_list[i])
+        for i, server in enumerate(self.servers):
+            self.set_ro(server, read_only_list[i])
 
     def retry(self, func, count=5, timeout=0.5):
         for i in range(count):
             try:
                 func()
-            except Exception as e:
+            except Exception as exc:  # pylint: disable=bad-option-value,broad-exception-caught,broad-except
                 if i + 1 == count:
-                    raise e
+                    raise exc
 
             time.sleep(timeout)
 
     @classmethod
-    def setUpClass(self):
+    def setUpClass(cls):
         print(' POOL '.center(70, '='), file=sys.stderr)
         print('-' * 70, file=sys.stderr)
 
@@ -79,6 +100,7 @@ def setUp(self):
         # Create five servers and extract helpful fields for tests.
         self.servers = []
         self.addrs = []
+        self.pool = None
         self.servers_count = 5
         for i in range(self.servers_count):
             srv = create_server(i)
@@ -108,8 +130,9 @@ def test_00_basic(self):
 
     def test_01_roundrobin(self):
         self.set_cluster_ro([False, False, True, False, True])
-        RW_ports = set([str(self.addrs[0]['port']), str(self.addrs[1]['port']), str(self.addrs[3]['port'])])
-        RO_ports = set([str(self.addrs[2]['port']), str(self.addrs[4]['port'])])
+        rw_ports = set([str(self.addrs[0]['port']), str(self.addrs[1]['port']),
+                        str(self.addrs[3]['port'])])
+        ro_ports = set([str(self.addrs[2]['port']), str(self.addrs[4]['port'])])
         all_ports = set()
         for addr in self.addrs:
             all_ports.add(str(addr['port']))
@@ -126,79 +149,79 @@ def get_port(self, mode):
             return resp.data[0]
 
         # Expect ANY iterate through all instances.
-        ANY_ports_result = set()
-        for i in range(len(self.servers)):
-            ANY_ports_result.add(get_port(self, tarantool.Mode.ANY))
+        any_ports_result = set()
+        for _ in range(len(self.servers)):
+            any_ports_result.add(get_port(self, tarantool.Mode.ANY))
 
-        self.assertSetEqual(ANY_ports_result, all_ports)
+        self.assertSetEqual(any_ports_result, all_ports)
 
         # Expect RW iterate through all RW instances.
-        RW_ports_result = set()
-        for i in range(len(self.servers)):
-            RW_ports_result.add(get_port(self, tarantool.Mode.RW))
+        rw_ports_result = set()
+        for _ in range(len(self.servers)):
+            rw_ports_result.add(get_port(self, tarantool.Mode.RW))
 
-        self.assertSetEqual(RW_ports_result, RW_ports)
+        self.assertSetEqual(rw_ports_result, rw_ports)
 
         # Expect RO iterate through all RO instances.
-        RO_ports_result = set()
-        for i in range(len(self.servers)):
-            RO_ports_result.add(get_port(self, tarantool.Mode.RO))
+        ro_ports_result = set()
+        for _ in range(len(self.servers)):
+            ro_ports_result.add(get_port(self, tarantool.Mode.RO))
 
-        self.assertSetEqual(RO_ports_result, RO_ports)
+        self.assertSetEqual(ro_ports_result, ro_ports)
 
         # Expect PREFER_RW iterate through all RW instances if there is at least one.
-        PREFER_RW_ports_result = set()
-        for i in range(len(self.servers)):
-            PREFER_RW_ports_result.add(get_port(self, tarantool.Mode.PREFER_RW))
+        prefer_rw_ports_result = set()
+        for _ in range(len(self.servers)):
+            prefer_rw_ports_result.add(get_port(self, tarantool.Mode.PREFER_RW))
 
-        self.assertSetEqual(PREFER_RW_ports_result, RW_ports)
+        self.assertSetEqual(prefer_rw_ports_result, rw_ports)
 
         # Expect PREFER_RO iterate through all RO instances if there is at least one.
-        PREFER_RO_ports_result = set()
-        for i in range(len(self.servers)):
-            PREFER_RO_ports_result.add(get_port(self, tarantool.Mode.PREFER_RO))
+        prefer_ro_ports_result = set()
+        for _ in range(len(self.servers)):
+            prefer_ro_ports_result.add(get_port(self, tarantool.Mode.PREFER_RO))
 
-        self.assertSetEqual(PREFER_RO_ports_result, RO_ports)
+        self.assertSetEqual(prefer_ro_ports_result, ro_ports)
 
         # Setup cluster with no RW.
         self.set_cluster_ro([True, True, True, True, True])
 
         # Expect RW to fail if there are no RW.
-        def expect_RW_to_fail_if_there_are_no_RW():
+        def expect_rw_to_fail_if_there_are_no_rw():
             with self.assertRaises(PoolTolopogyError):
                 self.pool.eval('return box.cfg.listen', mode=tarantool.Mode.RW)
 
-        self.retry(func=expect_RW_to_fail_if_there_are_no_RW)
+        self.retry(func=expect_rw_to_fail_if_there_are_no_rw)
 
         # Expect PREFER_RW iterate through all instances if there are no RW.
-        def expect_PREFER_RW_iterate_through_all_instances_if_there_are_no_RW():
-            PREFER_RW_ports_result_all_ro = set()
-            for i in range(len(self.servers)):
-                PREFER_RW_ports_result_all_ro.add(get_port(self, tarantool.Mode.PREFER_RW))
+        def expect_prefer_rw_iterate_through_all_instances_if_there_are_no_rw():
+            prefer_rw_ports_result_all_ro = set()
+            for _ in range(len(self.servers)):
+                prefer_rw_ports_result_all_ro.add(get_port(self, tarantool.Mode.PREFER_RW))
+
+            self.assertSetEqual(prefer_rw_ports_result_all_ro, all_ports)
 
-            self.assertSetEqual(PREFER_RW_ports_result_all_ro, all_ports)
-    
-        self.retry(func=expect_PREFER_RW_iterate_through_all_instances_if_there_are_no_RW)
+        self.retry(func=expect_prefer_rw_iterate_through_all_instances_if_there_are_no_rw)
 
         # Setup cluster with no RO.
         self.set_cluster_ro([False, False, False, False, False])
 
         # Expect RO to fail if there are no RO.
-        def expect_RO_to_fail_if_there_are_no_RO():
+        def expect_ro_to_fail_if_there_are_no_ro():
             with self.assertRaises(PoolTolopogyError):
                 self.pool.eval('return box.cfg.listen', mode=tarantool.Mode.RO)
 
-        self.retry(func=expect_RO_to_fail_if_there_are_no_RO)
+        self.retry(func=expect_ro_to_fail_if_there_are_no_ro)
 
         # Expect PREFER_RO iterate through all instances if there are no RO.
-        def expect_PREFER_RO_iterate_through_all_instances_if_there_are_no_RO():
-            PREFER_RO_ports_result_all_rw = set()
-            for i in range(len(self.servers)):
-                PREFER_RO_ports_result_all_rw.add(get_port(self, tarantool.Mode.PREFER_RO))
+        def expect_prefer_ro_iterate_through_all_instances_if_there_are_no_ro():
+            prefer_ro_ports_result_all_rw = set()
+            for _ in range(len(self.servers)):
+                prefer_ro_ports_result_all_rw.add(get_port(self, tarantool.Mode.PREFER_RO))
 
-            self.assertSetEqual(PREFER_RO_ports_result_all_rw, all_ports)
+            self.assertSetEqual(prefer_ro_ports_result_all_rw, all_ports)
 
-        self.retry(func=expect_PREFER_RO_iterate_through_all_instances_if_there_are_no_RO)
+        self.retry(func=expect_prefer_ro_iterate_through_all_instances_if_there_are_no_ro)
 
     def test_02_exception_raise(self):
         self.set_cluster_ro([False, False, True, False, True])
@@ -222,8 +245,7 @@ def test_03_insert(self):
             self.pool.insert('test', ['test_03_insert_1', 1]),
             [['test_03_insert_1', 1]])
         self.assertSequenceEqual(
-            self.pool.insert('test', ['test_03_insert_2', 2],
-                mode=tarantool.Mode.RW),
+            self.pool.insert('test', ['test_03_insert_2', 2], mode=tarantool.Mode.RW),
             [['test_03_insert_2', 2]])
 
         conn_2 = tarantool.connect(
@@ -294,8 +316,9 @@ def test_05_upsert(self):
                 [['test_05_upsert', 3]])
 
             self.assertSequenceEqual(
-                self.pool.upsert('test', ['test_05_upsert', 3],
-                    [('+', 1, 1)], mode=tarantool.Mode.RW), [])
+                self.pool.upsert('test', ['test_05_upsert', 3], [('+', 1, 1)],
+                                 mode=tarantool.Mode.RW),
+                [])
             self.assertSequenceEqual(
                 conn_1.select('test', 'test_05_upsert'),
                 [['test_05_upsert', 4]])
@@ -327,8 +350,8 @@ def test_06_update(self):
                 [['test_06_update_1', 4]])
 
             self.assertSequenceEqual(
-                self.pool.update('test', ('test_06_update_2',),
-                    [('=', 1, 10)], mode=tarantool.Mode.RW),
+                self.pool.update('test', ('test_06_update_2',), [('=', 1, 10)],
+                                 mode=tarantool.Mode.RW),
                 [['test_06_update_2', 10]])
             self.assertSequenceEqual(
                 conn_4.select('test', 'test_06_update_2'),
@@ -354,7 +377,7 @@ def test_07_replace(self):
 
             self.assertSequenceEqual(
                 self.pool.replace('test', ['test_07_replace', 4],
-                    mode=tarantool.Mode.RW),
+                                  mode=tarantool.Mode.RW),
                 [['test_07_replace', 4]])
             self.assertSequenceEqual(
                 conn_4.select('test', 'test_07_replace'),
@@ -394,22 +417,17 @@ def test_08_select(self):
             self.pool.select('test', 'test_08_select'),
             [['test_08_select', 3]])
         self.assertSequenceEqual(
-            self.pool.select('test', ['test_08_select'],
-                mode=tarantool.Mode.ANY),
+            self.pool.select('test', ['test_08_select'], mode=tarantool.Mode.ANY),
             [['test_08_select', 3]])
         self.assertSequenceEqual(
-            self.pool.select('test', 3, index='id',
-                mode=tarantool.Mode.RO),
+            self.pool.select('test', 3, index='id', mode=tarantool.Mode.RO),
             [['test_08_select', 3]])
         self.assertSequenceEqual(
-            self.pool.select('test', [3], index='id',
-                mode=tarantool.Mode.PREFER_RW),
+            self.pool.select('test', [3], index='id', mode=tarantool.Mode.PREFER_RW),
             [['test_08_select', 3]])
 
     def test_09_ping(self):
-        self.pool = tarantool.ConnectionPool(addrs=self.addrs,
-            user='test',
-            password='test')
+        self.pool = tarantool.ConnectionPool(addrs=self.addrs, user='test', password='test')
 
         with self.assertRaisesRegex(ValueError, "Please, specify 'mode' keyword argument"):
             self.pool.ping()
@@ -473,7 +491,7 @@ def test_12_execute(self):
 
         resp = self.pool.execute(
             'insert into "test" values (:pk, :id)',
-            { 'pk': 'test_12_execute_2', 'id': 2},
+            {'pk': 'test_12_execute_2', 'id': 2},
             mode=tarantool.Mode.RW)
         self.assertEqual(resp.affected_row_count, 1)
         self.assertEqual(resp.data, None)
@@ -509,12 +527,12 @@ def test_13_failover(self):
         self.servers[0].stop()
         self.set_ro(self.servers[1], False)
 
-        def expect_RW_request_execute_on_new_master():
+        def expect_rw_request_execute_on_new_master():
             self.assertSequenceEqual(
                 self.pool.eval('return box.cfg.listen', mode=tarantool.Mode.RW),
-                [ str(self.addrs[1]['port']) ])
+                [str(self.addrs[1]['port'])])
 
-        self.retry(func=expect_RW_request_execute_on_new_master)
+        self.retry(func=expect_rw_request_execute_on_new_master)
 
     def test_14_cluster_with_instances_dead_in_runtime_is_ok(self):
         warnings.simplefilter('ignore', category=ClusterConnectWarning)
@@ -544,10 +562,10 @@ def test_15_cluster_with_dead_instances_on_start_is_ok(self):
 
         self.servers[0].start()
 
-        def ping_RW():
+        def ping_rw():
             self.pool.ping(mode=tarantool.Mode.RW)
 
-        self.retry(func=ping_RW)
+        self.retry(func=ping_rw)
 
     def test_16_is_closed(self):
         self.set_cluster_ro([False, False, True, False, True])
@@ -564,7 +582,7 @@ def test_16_is_closed(self):
         self.assertEqual(self.pool.is_closed(), True)
 
     def tearDown(self):
-        if hasattr(self, 'pool'):
+        if self.pool:
             self.pool.close()
 
         for srv in self.servers:
diff --git a/test/suites/test_protocol.py b/test/suites/test_protocol.py
index 6a548e4f..004f0ea0 100644
--- a/test/suites/test_protocol.py
+++ b/test/suites/test_protocol.py
@@ -1,30 +1,41 @@
+"""
+This module tests connection authentication.
+"""
+# pylint: disable=missing-class-docstring,missing-function-docstring,protected-access,duplicate-code
+
 import sys
-import pkg_resources
 import unittest
 import uuid
 
-import tarantool
-from tarantool.utils import greeting_decode, version_id
-
-from .lib.tarantool_server import TarantoolServer
+import pkg_resources
 
+import tarantool
 from tarantool.const import (
     IPROTO_FEATURE_STREAMS,
     IPROTO_FEATURE_TRANSACTIONS,
     IPROTO_FEATURE_ERROR_EXTENSION,
     IPROTO_FEATURE_WATCHERS,
+    IPROTO_FEATURE_PAGINATION,
+    IPROTO_FEATURE_SPACE_AND_INDEX_NAMES,
+    IPROTO_FEATURE_WATCH_ONCE,
 )
+from tarantool.error import NetworkError
+from tarantool.utils import greeting_decode, version_id
+
+from .lib.tarantool_server import TarantoolServer
+from .lib.skip import skip_or_run_iproto_basic_features_test
+
 
-class TestSuite_Protocol(unittest.TestCase):
+class TestSuiteProtocol(unittest.TestCase):
     @classmethod
-    def setUpClass(self):
+    def setUpClass(cls):
         print(' PROTOCOL '.center(70, '='), file=sys.stderr)
         print('-' * 70, file=sys.stderr)
-        self.srv = TarantoolServer()
-        self.srv.script = 'test/suites/box.lua'
-        self.srv.start()
-        self.con = tarantool.Connection(self.srv.host, self.srv.args['primary'])
-        self.adm = self.srv.admin
+        cls.srv = TarantoolServer()
+        cls.srv.script = 'test/suites/box.lua'
+        cls.srv.start()
+        cls.con = tarantool.Connection(cls.srv.host, cls.srv.args['primary'])
+        cls.adm = cls.srv.admin
 
     def setUp(self):
         # prevent a remote tarantool from clean our session
@@ -33,7 +44,7 @@ def setUp(self):
 
     def test_00_greeting_1_6(self):
         buf = "Tarantool 1.6.6                                                \n" + \
-              "AtQnb9SAIaKazZZy9lJKvK3urtbjCEJndhRVbslSPGc=                   \n";
+              "AtQnb9SAIaKazZZy9lJKvK3urtbjCEJndhRVbslSPGc=                   \n"
         greeting = greeting_decode(buf.encode())
         self.assertEqual(greeting.version_id, version_id(1, 6, 6))
         self.assertEqual(greeting.protocol, "Binary")
@@ -42,7 +53,7 @@ def test_00_greeting_1_6(self):
 
     def test_01_greeting_1_6_with_tag(self):
         buf = "Tarantool 1.6.6-232-gcf47324                                   \n" + \
-              "AtQnb9SAIaKazZZy9lJKvK3urtbjCEJndhRVbslSPGc=                   \n";
+              "AtQnb9SAIaKazZZy9lJKvK3urtbjCEJndhRVbslSPGc=                   \n"
         greeting = greeting_decode(buf.encode())
         self.assertEqual(greeting.version_id, version_id(1, 6, 6))
         self.assertEqual(greeting.protocol, "Binary")
@@ -51,7 +62,7 @@ def test_01_greeting_1_6_with_tag(self):
 
     def test_02_greeting_1_6_console(self):
         buf = "Tarantool 1.6.6-132-g82f5424 (Lua console)                     \n" + \
-              "type 'help' for interactive help                               \n";
+              "type 'help' for interactive help                               \n"
         greeting = greeting_decode(buf.encode())
         self.assertEqual(greeting.version_id, version_id(1, 6, 6))
         self.assertEqual(greeting.protocol, "Lua console")
@@ -60,7 +71,7 @@ def test_02_greeting_1_6_console(self):
 
     def test_03_greeting_1_6_7(self):
         buf = "Tarantool 1.6.7 (Binary) 52dc2837-8001-48fe-bdce-c493c04599ce  \n" + \
-              "Z+2F+VRlyK1nKT82xQtxqEggMtkTK5RtPYf27JryRas=                   \n";
+              "Z+2F+VRlyK1nKT82xQtxqEggMtkTK5RtPYf27JryRas=                   \n"
         greeting = greeting_decode(buf.encode())
         self.assertEqual(greeting.version_id, version_id(1, 6, 7))
         self.assertEqual(greeting.protocol, "Binary")
@@ -85,10 +96,38 @@ def test_04_protocol(self):
         self.assertEqual(self.con._features[IPROTO_FEATURE_STREAMS], False)
         self.assertEqual(self.con._features[IPROTO_FEATURE_TRANSACTIONS], False)
         self.assertEqual(self.con._features[IPROTO_FEATURE_WATCHERS], False)
+        self.assertEqual(self.con._features[IPROTO_FEATURE_PAGINATION], False)
+        self.assertEqual(self.con._features[IPROTO_FEATURE_SPACE_AND_INDEX_NAMES], False)
+        self.assertEqual(self.con._features[IPROTO_FEATURE_WATCH_ONCE], False)
 
-    @classmethod
-    def tearDownClass(self):
-        self.con.close()
-        self.srv.stop()
-        self.srv.clean()
+    @skip_or_run_iproto_basic_features_test
+    def test_protocol_requirement(self):
+        try:
+            con = tarantool.Connection(self.srv.host, self.srv.args['primary'],
+                                       required_protocol_version=3,
+                                       required_features=[IPROTO_FEATURE_STREAMS,
+                                                          IPROTO_FEATURE_TRANSACTIONS,
+                                                          IPROTO_FEATURE_ERROR_EXTENSION])
+            con.close()
+        except Exception as exc:  # pylint: disable=bad-option-value,broad-exception-caught,broad-except
+            self.fail(f'Connection create have raised Exception: {repr(exc)}')
+
+    def test_protocol_version_requirement_fail(self):
+        with self.assertRaisesRegex(NetworkError,  # ConfigurationError is wrapped in NetworkError
+                                    'protocol version 100500 is required'):
+            con = tarantool.Connection(self.srv.host, self.srv.args['primary'],
+                                       required_protocol_version=100500)
+            con.close()
 
+    def test_protocol_features_requirement_fail(self):
+        with self.assertRaisesRegex(NetworkError,  # ConfigurationError is wrapped in NetworkError
+                                    'Server missing protocol features with id 100500, 500100'):
+            con = tarantool.Connection(self.srv.host, self.srv.args['primary'],
+                                       required_features=[100500, 500100])
+            con.close()
+
+    @classmethod
+    def tearDownClass(cls):
+        cls.con.close()
+        cls.srv.stop()
+        cls.srv.clean()
diff --git a/test/suites/test_push.py b/test/suites/test_push.py
index 618a56f5..24a1ae7d 100644
--- a/test/suites/test_push.py
+++ b/test/suites/test_push.py
@@ -1,97 +1,92 @@
+"""
+This module tests work with IPROTO pushed messages.
+"""
+# pylint: disable=missing-class-docstring,missing-function-docstring,duplicate-code
+
 import sys
 import unittest
 import tarantool
 from .lib.tarantool_server import TarantoolServer
+from .utils import assert_admin_success
 
 
 def create_server():
     srv = TarantoolServer()
     srv.script = 'test/suites/box.lua'
     srv.start()
-    srv.admin("box.schema.user.create('test', {password = 'test', " +
-              "if_not_exists = true})")
-    srv.admin("box.schema.user.grant('test', 'read,write,execute', 'universe')")
-
-    # Create server_function (for testing purposes).
-    srv.admin("""
-    function server_function()
-        x = {0,0}
-        while x[1] < 3 do
-            x[1] = x[1] + 1
-            box.session.push(x)
+    resp = srv.admin("""
+        box.schema.user.create('test', {password = 'test', if_not_exists = true})
+        box.schema.user.grant('test', 'read,write,execute', 'universe',
+                              nil, {if_not_exists = true})
+
+        function server_function()
+            x = {0,0}
+            while x[1] < 3 do
+                x[1] = x[1] + 1
+                box.session.push(x)
+            end
+            return x
         end
-        return x
-    end
-    """)
 
-    # Create tester space and on_replace trigger (for testing purposes).
-    srv.admin("""
-    box.schema.create_space(
-        'tester', {
-        format = {
-            {name = 'id', type = 'unsigned'},
-            {name = 'name', type = 'string'},
-        }
-    })
-    """)
-    srv.admin("""
-    box.space.tester:create_index(
-        'primary_index', {
-        parts = {
-            {field = 1, type = 'unsigned'},
-        }
-    })
-    """)
-    srv.admin("""
-    box.space.tester:create_index(
-        'primary_index', {
-        parts = {
-            {field = 1, type = 'unsigned'},
-        }
-    })
-    """)
-    srv.admin("""
-    function on_replace_callback()
-        x = {0,0}
-        while x[1] < 300 do
-            x[1] = x[1] + 100
-            box.session.push(x)
+        box.schema.create_space(
+            'tester', {
+            format = {
+                {name = 'id', type = 'unsigned'},
+                {name = 'name', type = 'string'},
+            }
+        })
+
+        box.space.tester:create_index(
+            'primary_index', {
+            parts = {
+                {field = 1, type = 'unsigned'},
+            },
+            if_not_exists = true,
+        })
+
+        function on_replace_callback()
+            x = {0,0}
+            while x[1] < 300 do
+                x[1] = x[1] + 100
+                box.session.push(x)
+            end
         end
-    end
-    """)
-    srv.admin("""
-    box.space.tester:on_replace(
-        on_replace_callback
-    )
+
+        box.space.tester:on_replace(
+            on_replace_callback
+        )
+
+        return true
     """)
+    assert_admin_success(resp)
 
     return srv
 
 
 # Callback for on_push arg (for testing purposes).
-def push_callback(data, on_push_ctx=[]):
+def push_callback(data, on_push_ctx):
     data[0][1] = data[0][1] + 1
     on_push_ctx.append(data)
 
 
-class TestSuite_Push(unittest.TestCase):
+class TestSuitePush(unittest.TestCase):
 
     @classmethod
-    def setUpClass(self):
+    def setUpClass(cls):
         print(' PUSH '.center(70, '='), file=sys.stderr)
         print('-' * 70, file=sys.stderr)
         # Create server and extract helpful fields for tests.
-        self.srv = create_server()
-        self.host = self.srv.host
-        self.port = self.srv.args['primary']
+        cls.srv = create_server()
+        cls.host = cls.srv.host
+        cls.port = cls.srv.args['primary']
 
     def setUp(self):
         # Open connection, connection pool and mesh connection to instance.
-        self.conn = tarantool.Connection(host=self.host, port=self.port, 
+        self.conn = tarantool.Connection(host=self.host, port=self.port,
                                          user='test', password='test')
-        self.conn_pool = tarantool.ConnectionPool([{'host':self.host, 'port':self.port}], 
-                                                     user='test', password='test')
-        self.mesh_conn = tarantool.MeshConnection(host=self.host, port=self.port, 
+        self.conn_pool = tarantool.ConnectionPool([{'host': self.host, 'port': self.port}],
+                                                  user='test', password='test')
+        self.mesh_conn = tarantool.MeshConnection(host=self.host, port=self.port,
                                                   user='test', password='test')
 
     push_test_cases = {
@@ -199,11 +194,10 @@ def setUp(self):
     }
 
     def test_00_00_push_via_connection(self):
-        for case_name in self.push_test_cases.keys():
-            with self.subTest(name=case_name):
+        for name, case in self.push_test_cases.items():
+            with self.subTest(name=name):
                 callback_res = []
-                case = self.push_test_cases[case_name]
-                testing_function = getattr(self.conn, case_name)
+                testing_function = getattr(self.conn, name)
                 case['input']['kwargs']['on_push_ctx'] = callback_res
                 resp = testing_function(
                     *case['input']['args'],
@@ -214,11 +208,10 @@ def test_00_00_push_via_connection(self):
                     self.assertEqual(resp.data[0], case['output']['resp'])
 
     def test_00_01_push_via_mesh_connection(self):
-        for case_name in self.push_test_cases.keys():
-            with self.subTest(name=case_name):
+        for name, case in self.push_test_cases.items():
+            with self.subTest(name=name):
                 callback_res = []
-                case = self.push_test_cases[case_name]
-                testing_function = getattr(self.mesh_conn, case_name)
+                testing_function = getattr(self.mesh_conn, name)
                 case['input']['kwargs']['on_push_ctx'] = callback_res
                 resp = testing_function(
                     *case['input']['args'],
@@ -229,11 +222,10 @@ def test_00_01_push_via_mesh_connection(self):
                     self.assertEqual(resp.data[0], case['output']['resp'])
 
     def test_00_02_push_via_connection_pool(self):
-        for case_name in self.push_test_cases.keys():
-            with self.subTest(name=case_name):
+        for name, case in self.push_test_cases.items():
+            with self.subTest(name=name):
                 callback_res = []
-                case = self.push_test_cases[case_name]
-                testing_function = getattr(self.conn_pool, case_name)
+                testing_function = getattr(self.conn_pool, name)
                 case['input']['kwargs']['on_push_ctx'] = callback_res
                 resp = testing_function(
                     *case['input']['args'],
@@ -251,7 +243,7 @@ def tearDown(self):
         self.mesh_conn.close()
 
     @classmethod
-    def tearDownClass(self):
+    def tearDownClass(cls):
         # Stop instance.
-        self.srv.stop()
-        self.srv.clean()
+        cls.srv.stop()
+        cls.srv.clean()
diff --git a/test/suites/test_reconnect.py b/test/suites/test_reconnect.py
index fc41cb57..f7811fab 100644
--- a/test/suites/test_reconnect.py
+++ b/test/suites/test_reconnect.py
@@ -1,3 +1,8 @@
+"""
+This module tests basic reconnect behavior.
+"""
+# pylint: disable=missing-class-docstring,missing-function-docstring
+
 import sys
 import unittest
 import warnings
@@ -5,13 +10,13 @@
 from .lib.tarantool_server import TarantoolServer
 
 
-class TestSuite_Reconnect(unittest.TestCase):
+class TestSuiteReconnect(unittest.TestCase):
     @classmethod
-    def setUpClass(self):
+    def setUpClass(cls):
         print(' RECONNECT '.center(70, '='), file=sys.stderr)
         print('-' * 70, file=sys.stderr)
-        self.srv = TarantoolServer()
-        self.srv.script = 'test/suites/box.lua'
+        cls.srv = TarantoolServer()
+        cls.srv.script = 'test/suites/box.lua'
 
     def setUp(self):
         # prevent a remote tarantool from clean our session
@@ -80,5 +85,5 @@ def test_03_connect_after_close(self):
         self.srv.stop()
 
     @classmethod
-    def tearDownClass(self):
-        self.srv.clean()
+    def tearDownClass(cls):
+        cls.srv.clean()
diff --git a/test/suites/test_schema.py b/test/suites/test_schema.py
index 09017b2a..c90ddbff 100644
--- a/test/suites/test_schema.py
+++ b/test/suites/test_schema.py
@@ -1,7 +1,18 @@
+"""
+This module tests space and index schema fetch.
+"""
+# pylint: disable=missing-class-docstring,missing-function-docstring,fixme,too-many-public-methods,too-many-branches,too-many-statements,duplicate-code
+
 import sys
 import unittest
+import pkg_resources
+
 import tarantool
+from tarantool.error import NotSupportedError
+
 from .lib.tarantool_server import TarantoolServer
+from .lib.skip import skip_or_run_constraints_test
+from .utils import assert_admin_success
 
 
 # FIXME: I'm quite sure that there is a simpler way to count
@@ -16,9 +27,11 @@ def _bind(self, obj, method_name):
         self._obj = obj
         self._method_name = method_name
         self._saved_method = getattr(obj, method_name)
+
         def wrapper(_, *args, **kwargs):
             self._call_count += 1
             return self._saved_method(*args, **kwargs)
+
         bound_wrapper = wrapper.__get__(obj.__class__, obj)
         setattr(obj, method_name, bound_wrapper)
 
@@ -30,31 +43,74 @@ def call_count(self):
         return self._call_count
 
 
-class TestSuite_Schema_Abstract(unittest.TestCase):
+class TestSuiteSchemaAbstract(unittest.TestCase):
     # Define 'encoding' field in a concrete class.
+    encoding = None
 
     @classmethod
-    def setUpClass(self):
-        params = 'connection.encoding: {}'.format(repr(self.encoding))
-        print(' SCHEMA ({}) '.format(params).center(70, '='), file=sys.stderr)
+    def setUpClass(cls):
+        params = f'connection.encoding: {repr(cls.encoding)}'
+        print(f' SCHEMA ({params}) '.center(70, '='), file=sys.stderr)
         print('-' * 70, file=sys.stderr)
-        self.srv = TarantoolServer()
-        self.srv.script = 'test/suites/box.lua'
-        self.srv.start()
-        self.con = tarantool.Connection(self.srv.host, self.srv.args['primary'],
-                                        encoding=self.encoding)
-        self.sch = self.con.schema
-
-        # The relevant test cases mainly target Python 2, where
-        # a user may want to pass a string literal as a space or
-        # an index name and don't bother whether all symbols in it
-        # are ASCII.
-        self.unicode_space_name_literal = '∞'
-        self.unicode_index_name_literal = '→'
-
-        self.unicode_space_name_u = u'∞'
-        self.unicode_index_name_u = u'→'
-        self.unicode_space_id, self.unicode_index_id = self.srv.admin("""
+        cls.srv = TarantoolServer()
+        cls.srv.script = 'test/suites/box.lua'
+        cls.srv.start()
+        resp = cls.srv.admin("""
+            box.schema.user.create('test', {password = 'test', if_not_exists = true})
+            box.schema.user.grant('test', 'read,write,execute', 'universe',
+                                  nil, {if_not_exists = true})
+
+            function server_function() return 2+2 end
+
+            box.schema.create_space(
+                'tester', {
+                format = {
+                    {name = 'id', type = 'unsigned'},
+                    {name = 'name', type = 'string', is_nullable = true},
+                },
+                if_not_exists = true,
+            })
+
+            box.space.tester:create_index(
+                'primary_index', {
+                parts = {
+                    {field = 1, type = 'unsigned'},
+                },
+                if_not_exists = true,
+            })
+
+            box.space.tester:insert({1, nil})
+
+            return true
+        """)
+        assert_admin_success(resp)
+
+        cls.con = tarantool.Connection(cls.srv.host, cls.srv.args['primary'],
+                                       encoding=cls.encoding, user='test', password='test')
+        cls.con_schema_disable = tarantool.Connection(cls.srv.host, cls.srv.args['primary'],
+                                                      encoding=cls.encoding, fetch_schema=False,
+                                                      user='test', password='test')
+        if not sys.platform.startswith("win"):
+            # Schema fetch disable tests via mesh and pool connection
+            # are not supported on windows platform.
+            cls.mesh_con_schema_disable = tarantool.MeshConnection(
+                host=cls.srv.host,
+                port=cls.srv.args['primary'],
+                fetch_schema=False,
+                user='test', password='test')
+            cls.pool_con_schema_disable = tarantool.ConnectionPool(
+                [{
+                    'host': cls.srv.host,
+                    'port': cls.srv.args['primary']
+                }],
+                user='test', password='test',
+                fetch_schema=False)
+        cls.sch = cls.con.schema
+
+        cls.unicode_space_name_literal = '∞'
+        cls.unicode_index_name_literal = '→'
+
+        cls.unicode_space_id, cls.unicode_index_id = cls.srv.admin("""
             do
                 local space = box.schema.create_space('\\xe2\\x88\\x9e')
                 local index = space:create_index('\\xe2\\x86\\x92')
@@ -62,6 +118,36 @@ def setUpClass(self):
             end
         """)
 
+        if cls.srv.admin.tnt_version >= pkg_resources.parse_version('2.10.0'):
+            resp = cls.srv.admin("""
+                box.schema.create_space(
+                    'constr_tester_1', {
+                    format = {
+                        { name = 'id', type = 'unsigned' },
+                        { name = 'payload', type = 'number' },
+                    }
+                })
+                box.space.constr_tester_1:create_index('I1', { parts = {'id'} })
+
+                box.space.constr_tester_1:replace({1, 999})
+
+                box.schema.create_space(
+                    'constr_tester_2', {
+                    format = {
+                        { name = 'id', type = 'unsigned' },
+                        { name = 'table1_id', type = 'unsigned',
+                          foreign_key = { fk_video = { space = 'constr_tester_1', field = 'id' } },
+                        },
+                        { name = 'payload', type = 'number' },
+                    }
+                })
+                box.space.constr_tester_2:create_index('I1', { parts = {'id'} })
+                box.space.constr_tester_2:create_index('I2', { parts = {'table1_id'} })
+
+                return true
+            """)
+            assert_admin_success(resp)
+
     def setUp(self):
         # prevent a remote tarantool from clean our session
         if self.srv.is_started():
@@ -88,47 +174,33 @@ def fetch_count(self):
 
     def verify_unicode_space(self, space):
         self.assertEqual(space.sid, self.unicode_space_id)
-        self.assertEqual(space.name, self.unicode_space_name_u)
+        self.assertEqual(space.name, self.unicode_space_name_literal)
         self.assertEqual(space.arity, 1)
 
     def verify_unicode_index(self, index):
-        self.assertEqual(index.space.name, self.unicode_space_name_u)
+        self.assertEqual(index.space.name, self.unicode_space_name_literal)
         self.assertEqual(index.iid, self.unicode_index_id)
-        self.assertEqual(index.name, self.unicode_index_name_u)
+        self.assertEqual(index.name, self.unicode_index_name_literal)
         self.assertEqual(len(index.parts), 1)
 
-    def test_00_authenticate(self):
-        self.assertIsNone(self.srv.admin("box.schema.user.create('test', { password = 'test' })"))
-        self.assertIsNone(self.srv.admin("box.schema.user.grant('test', 'read,write', 'space', '_space')"))
-        self.assertIsNone(self.srv.admin("box.schema.user.grant('test', 'read,write', 'space', '_index')"))
-        self.assertEqual(self.con.authenticate('test', 'test')._data, None)
-
     def test_01_space_bad(self):
-        with self.assertRaisesRegex(tarantool.SchemaError,
-                'There\'s no space.*'):
+        with self.assertRaisesRegex(tarantool.SchemaError, 'There\'s no space.*'):
             self.sch.get_space(0)
-        with self.assertRaisesRegex(tarantool.SchemaError,
-                'There\'s no space.*'):
+        with self.assertRaisesRegex(tarantool.SchemaError, 'There\'s no space.*'):
             self.sch.get_space(0)
-        with self.assertRaisesRegex(tarantool.SchemaError,
-                'There\'s no space.*'):
+        with self.assertRaisesRegex(tarantool.SchemaError, 'There\'s no space.*'):
             self.sch.get_space('bad_name')
 
     def test_02_index_bad(self):
-        with self.assertRaisesRegex(tarantool.SchemaError,
-                'There\'s no space.*'):
+        with self.assertRaisesRegex(tarantool.SchemaError, 'There\'s no space.*'):
             self.sch.get_index(0, 'primary')
-        with self.assertRaisesRegex(tarantool.SchemaError,
-                'There\'s no space.*'):
+        with self.assertRaisesRegex(tarantool.SchemaError, 'There\'s no space.*'):
             self.sch.get_index('bad_space', 'primary')
-        with self.assertRaisesRegex(tarantool.SchemaError,
-                'There\'s no index.*'):
+        with self.assertRaisesRegex(tarantool.SchemaError, 'There\'s no index.*'):
             self.sch.get_index(280, 'bad_index')
-        with self.assertRaisesRegex(tarantool.SchemaError,
-                'There\'s no index.*'):
+        with self.assertRaisesRegex(tarantool.SchemaError, 'There\'s no index.*'):
             self.sch.get_index(280, 'bad_index')
-        with self.assertRaisesRegex(tarantool.SchemaError,
-                'There\'s no index.*'):
+        with self.assertRaisesRegex(tarantool.SchemaError, 'There\'s no index.*'):
             self.sch.get_index(280, 3)
 
     def test_03_01_space_name__(self):
@@ -329,8 +401,8 @@ def test_06_index_cached(self):
             (self.unicode_space_id, self.unicode_index_name_literal),
             (self.unicode_space_id, self.unicode_index_id),
         )
-        for s, i in cases:
-            index = self.sch.get_index(s, i)
+        for space, index_id in cases:
+            index = self.sch.get_index(space, index_id)
             self.verify_unicode_index(index)
 
         # Verify that no schema fetches occurs.
@@ -341,16 +413,228 @@ def test_07_schema_version_update(self):
         self.srv.admin("box.schema.create_space('ttt22')")
         self.assertEqual(len(self.con.select('_space')), _space_len + 1)
 
-    @classmethod
-    def tearDownClass(self):
-        self.con.close()
-        self.srv.stop()
-        self.srv.clean()
-
+    # For schema fetch disable testing purposes.
+    testing_methods = {
+        'unavailable': {
+            'replace': {
+                'input': ['tester', (1, None)],
+                'output': [[1, None]],
+            },
+            'delete': {
+                'input': ['tester', 1],
+                'output': [[1, None]],
+            },
+            'insert': {
+                'input': ['tester', (1, None)],
+                'output': [[1, None]],
+            },
+            'upsert': {
+                'input': ['tester', (1, None), []],
+                'output': [],
+            },
+            'update': {
+                'input': ['tester', 1, []],
+                'output': [[1, None]],
+            },
+            'select': {
+                'input': ['tester', 1],
+                'output': [[1, None]],
+            },
+            'space': {
+                'input': ['tester'],
+            },
+        },
+        'available': {
+            # CRUD methods are also tested with the fetch_schema=False opt,
+            # see the test_crud.py file.
+            'call': {
+                'input': ['server_function'],
+                'output': [4],
+            },
+            'eval': {
+                'input': ['return 2+2'],
+                'output': [4],
+            },
+            'ping': {
+                'input': [],
+            },
+        },
+    }
+
+    def _run_test_schema_fetch_disable(self, con, mode=None):
+        # Enable SQL test case for tarantool 2.* and higher.
+        if int(str(self.srv.admin.tnt_version)[0]) > 1:
+            if self.srv.admin.tnt_version >= pkg_resources.parse_version('2.11.0'):
+                # SEQSCAN keyword is explicitly allowing to use seqscan
+                # https://github.com/tarantool/tarantool/commit/77648827326ad268ec0ffbcd620c2371b65ef2b4
+                # It was introduced in 2.11.0-rc1. If compat.sql_seq_scan_default
+                # set to "new" (default value since 3.0), returns error
+                # if trying to scan without keyword.
+                self.testing_methods['available']['execute'] = {
+                    'input': ['SELECT * FROM SEQSCAN "tester"'],
+                    'output': [[1, None]],
+                }
+            else:
+                self.testing_methods['available']['execute'] = {
+                    'input': ['SELECT * FROM "tester"'],
+                    'output': [[1, None]],
+                }
+
+        # Testing the schemaless connection with methods
+        # that should NOT be available.
+        if mode is not None:
+            for addr in con.pool.keys():
+                self.assertEqual(con.pool[addr].conn.schema_version, 0)
+                self.assertEqual(con.pool[addr].conn.schema, None)
+        else:
+            self.assertEqual(con.schema_version, 0)
+            self.assertEqual(con.schema, None)
+        for method_case in self.testing_methods['unavailable']:
+            with self.subTest(name=method_case):
+                if isinstance(con, tarantool.ConnectionPool) and method_case == 'space':
+                    continue
+                testing_function = getattr(con, method_case)
+                try:
+                    if mode is not None:
+                        _ = testing_function(
+                            *self.testing_methods['unavailable'][method_case]['input'],
+                            mode=mode)
+                    else:
+                        _ = testing_function(
+                            *self.testing_methods['unavailable'][method_case]['input'])
+                except NotSupportedError as exc:
+                    self.assertEqual(exc.message, 'This method is not available in '
+                                                  'connection opened with fetch_schema=False')
+        # Testing the schemaless connection with methods
+        # that should be available.
+        for method_case in self.testing_methods['available']:
+            with self.subTest(name=method_case):
+                testing_function = getattr(con, method_case)
+                if mode is not None:
+                    resp = testing_function(
+                        *self.testing_methods['available'][method_case]['input'],
+                        mode=mode)
+                else:
+                    resp = testing_function(
+                        *self.testing_methods['available'][method_case]['input'])
+                if method_case == 'ping':
+                    self.assertEqual(isinstance(resp, float), True)
+                else:
+                    self.assertEqual(
+                        resp.data,
+                        self.testing_methods['available'][method_case]['output'])
+
+        # Turning the same connection into schemaful.
+        if mode is not None:
+            for addr in con.pool.keys():
+                con.pool[addr].conn.update_schema(con.pool[addr].conn.schema_version)
+        else:
+            con.update_schema(con.schema_version)
+
+        # Testing the schemaful connection with methods
+        # that should NOW be available.
+        for method_case in self.testing_methods['unavailable']:
+            with self.subTest(name=method_case):
+                if isinstance(con, tarantool.ConnectionPool) and method_case == 'space':
+                    continue
+                testing_function = getattr(con, method_case)
+                if mode is not None:
+                    resp = testing_function(
+                        *self.testing_methods['unavailable'][method_case]['input'],
+                        mode=mode)
+                else:
+                    resp = testing_function(
+                        *self.testing_methods['unavailable'][method_case]['input'])
+                if method_case == 'space':
+                    self.assertEqual(isinstance(resp, tarantool.space.Space), True)
+                else:
+                    self.assertEqual(
+                        resp.data,
+                        self.testing_methods['unavailable'][method_case]['output'])
+        # Testing the schemaful connection with methods
+        # that should have remained available.
+        for method_case in self.testing_methods['available']:
+            with self.subTest(name=method_case):
+                testing_function = getattr(con, method_case)
+                if mode is not None:
+                    resp = testing_function(
+                        *self.testing_methods['available'][method_case]['input'],
+                        mode=mode)
+                else:
+                    resp = testing_function(
+                        *self.testing_methods['available'][method_case]['input'])
+                if method_case == 'ping':
+                    self.assertEqual(isinstance(resp, float), True)
+                else:
+                    self.assertEqual(
+                        resp.data,
+                        self.testing_methods['available'][method_case]['output'])
+        if mode is not None:
+            self.assertNotEqual(con.pool[addr].conn.schema_version, 1)
+            self.assertNotEqual(con.pool[addr].conn.schema, None)
+        else:
+            self.assertNotEqual(con.schema_version, 1)
+            self.assertNotEqual(con.schema, None)
+
+    def test_08_schema_fetch_disable_via_connection(self):
+        self._run_test_schema_fetch_disable(self.con_schema_disable)
+
+    @unittest.skipIf(
+        sys.platform.startswith("win"),
+        'Schema fetch disable tests via mesh connection on windows platform are not supported')
+    def test_08_schema_fetch_disable_via_mesh_connection(self):
+        self._run_test_schema_fetch_disable(self.mesh_con_schema_disable)
+
+    @unittest.skipIf(
+        sys.platform.startswith("win"),
+        'Schema fetch disable tests via connection pool on windows platform are not supported')
+    def test_08_schema_fetch_disable_via_connection_pool(self):
+        self._run_test_schema_fetch_disable(self.pool_con_schema_disable,
+                                            mode=tarantool.Mode.ANY)
+
+    @skip_or_run_constraints_test
+    def test_09_foreign_key_info_fetched_to_schema(self):
+        self.assertIn('foreign_key', self.sch.get_space('constr_tester_2').format['table1_id'])
+
+    @skip_or_run_constraints_test
+    def test_10_foreign_key_valid_replace(self):
+        self.assertSequenceEqual(
+            self.con.replace('constr_tester_2', [1, 1, 623]),
+            [[1, 1, 623]])
+
+    @skip_or_run_constraints_test
+    def test_11_foreign_key_invalid_replace(self):
+        with self.assertRaisesRegex(tarantool.DatabaseError,
+                                    'foreign tuple was not found'):
+            self.con.replace('constr_tester_2', [2, 999, 623])
 
-class TestSuite_Schema_UnicodeConnection(TestSuite_Schema_Abstract):
+    @classmethod
+    def tearDownClass(cls):
+        # We need to drop spaces with foreign keys with predetermined order,
+        # otherwise remote server clean() will fail to clean up resources.
+        if cls.srv.admin.tnt_version >= pkg_resources.parse_version('2.10.0'):
+            resp = cls.srv.admin("""
+                box.space.constr_tester_2:drop()
+                box.space.constr_tester_1:drop()
+
+                return true
+            """)
+            assert_admin_success(resp)
+
+        cls.con.close()
+        cls.con_schema_disable.close()
+        if not sys.platform.startswith("win"):
+            # Schema fetch disable tests via mesh and pool connection
+            # are not supported on windows platform.
+            cls.mesh_con_schema_disable.close()
+            cls.pool_con_schema_disable.close()
+        cls.srv.stop()
+        cls.srv.clean()
+
+
+class TestSuiteSchemaUnicodeConnection(TestSuiteSchemaAbstract):
     encoding = 'utf-8'
 
 
-class TestSuite_Schema_BinaryConnection(TestSuite_Schema_Abstract):
+class TestSuiteSchemaBinaryConnection(TestSuiteSchemaAbstract):
     encoding = None
diff --git a/test/suites/test_socket_fd.py b/test/suites/test_socket_fd.py
new file mode 100644
index 00000000..5cf94777
--- /dev/null
+++ b/test/suites/test_socket_fd.py
@@ -0,0 +1,200 @@
+"""
+This module tests work with connection over socket fd.
+"""
+import os.path
+# pylint: disable=missing-class-docstring,missing-function-docstring
+
+import socket
+import sys
+import unittest
+
+import tarantool
+from .lib.skip import skip_or_run_box_session_new_tests
+from .lib.tarantool_server import TarantoolServer, find_port
+from .utils import assert_admin_success
+
+
+def find_python():
+    for _dir in os.environ["PATH"].split(os.pathsep):
+        exe = os.path.join(_dir, "python")
+        if os.access(exe, os.X_OK):
+            return os.path.abspath(exe)
+    raise RuntimeError("Can't find python executable in " + os.environ["PATH"])
+
+
+class TestSuiteSocketFD(unittest.TestCase):
+    EVAL_USER = "return box.session.user()"
+
+    @classmethod
+    def setUpClass(cls):
+        print(' SOCKET FD '.center(70, '='), file=sys.stderr)
+        print('-' * 70, file=sys.stderr)
+
+        cls.srv = TarantoolServer()
+        cls.srv.script = 'test/suites/box.lua'
+        cls.srv.start()
+        cls.tcp_port = find_port()
+
+        # Start tcp server to test work with blocking sockets.
+        # pylint: disable=consider-using-f-string
+        resp = cls.srv.admin("""
+            local socket = require('socket')
+
+            box.cfg{}
+            box.schema.user.create('test', {password = 'test', if_not_exists = true})
+            box.schema.user.grant('test', 'read,write,execute,create', 'universe',
+                                   nil, {if_not_exists = true})
+            box.schema.user.grant('guest', 'execute', 'universe',
+                                   nil, {if_not_exists = true})
+
+            socket.tcp_server('0.0.0.0', %d, function(s)
+                if not s:nonblock(true) then
+                    s:close()
+                    return
+                end
+                box.session.new({
+                    type = 'binary',
+                    fd = s:fd(),
+                    user = 'test',
+                })
+                s:detach()
+            end)
+
+            box.schema.create_space('test', {
+                format = {{type='unsigned', name='id'}},
+                if_not_exists = true,
+            })
+            box.space.test:create_index('primary')
+
+            return true
+        """ % cls.tcp_port)
+        assert_admin_success(resp)
+
+    @skip_or_run_box_session_new_tests
+    def setUp(self):
+        # Prevent a remote tarantool from clean our session.
+        if self.srv.is_started():
+            self.srv.touch_lock()
+
+    def _get_tt_sock(self):
+        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        sock.connect((self.srv.host, self.tcp_port))
+        return sock
+
+    def test_01_incorrect_params(self):
+        cases = {
+            "host and socket_fd": {
+                "args": {"host": "123", "socket_fd": 3},
+                "msg": "specifying both socket_fd and host/port is not allowed",
+            },
+            "port and socket_fd": {
+                "args": {"port": 14, "socket_fd": 3},
+                "msg": "specifying both socket_fd and host/port is not allowed",
+            },
+            "empty": {
+                "args": {},
+                "msg": r"host/port.* port.* or socket_fd",
+            },
+            "only host": {
+                "args": {"host": "localhost"},
+                "msg": "when specifying host, it is also necessary to specify port",
+            },
+        }
+
+        for name, case in cases.items():
+            with self.subTest(msg=name):
+                with self.assertRaisesRegex(tarantool.Error, case["msg"]):
+                    tarantool.Connection(**case["args"])
+
+    def test_02_socket_fd_connect(self):
+        sock = self._get_tt_sock()
+        conn = tarantool.connect(None, None, socket_fd=sock.fileno())
+        sock.detach()
+        try:
+            self.assertSequenceEqual(conn.eval(self.EVAL_USER), ["test"])
+        finally:
+            conn.close()
+
+    def test_03_socket_fd_re_auth(self):
+        sock = self._get_tt_sock()
+        conn = tarantool.connect(None, None, socket_fd=sock.fileno(), user="guest")
+        sock.detach()
+        try:
+            self.assertSequenceEqual(conn.eval(self.EVAL_USER), ["guest"])
+        finally:
+            conn.close()
+
+    @unittest.skipIf(sys.platform.startswith("win"),
+                     "Skip on Windows since it uses remote server")
+    def test_04_tarantool_made_socket(self):
+        python_exe = find_python()
+        cwd = os.getcwd()
+        side_script_path = os.path.join(cwd, "test", "suites", "sidecar.py")
+
+        # pylint: disable=consider-using-f-string
+        ret_code, err = self.srv.admin("""
+            local socket = require('socket')
+            local popen = require('popen')
+            local os = require('os')
+            local s1, s2 = socket.socketpair('AF_UNIX', 'SOCK_STREAM', 0)
+
+            --[[ Tell sidecar which fd use to connect. --]]
+            os.setenv('SOCKET_FD', tostring(s2:fd()))
+
+            --[[ Tell sidecar where find `tarantool` module. --]]
+            os.setenv('PYTHONPATH', (os.getenv('PYTHONPATH') or '') .. ':' .. '%s')
+
+            box.session.new({
+                type = 'binary',
+                fd = s1:fd(),
+                user = 'test',
+            })
+            s1:detach()
+
+            local ph, err = popen.new({'%s', '%s'}, {
+                stdout = popen.opts.PIPE,
+                stderr = popen.opts.PIPE,
+                inherit_fds = {s2:fd()},
+            })
+
+            if err ~= nil then
+                return 1, err
+            end
+
+            ph:wait()
+
+            local status_code = ph:info().status.exit_code
+            local stderr = ph:read({stderr=true}):rstrip()
+            return status_code, stderr
+        """ % (cwd, python_exe, side_script_path))
+        self.assertIsNone(err, err)
+        self.assertEqual(ret_code, 0)
+
+    def test_05_socket_fd_pool(self):
+        sock = self._get_tt_sock()
+        pool = tarantool.ConnectionPool(
+            addrs=[{'host': None, 'port': None, 'socket_fd': sock.fileno()}]
+        )
+        sock.detach()
+        try:
+            self.assertSequenceEqual(pool.eval(self.EVAL_USER, mode=tarantool.Mode.ANY), ["test"])
+        finally:
+            pool.close()
+
+    def test_06_socket_fd_mesh(self):
+        sock = self._get_tt_sock()
+        mesh = tarantool.MeshConnection(
+            host=None,
+            port=None,
+            socket_fd=sock.fileno()
+        )
+        sock.detach()
+        try:
+            self.assertSequenceEqual(mesh.eval(self.EVAL_USER), ["test"])
+        finally:
+            mesh.close()
+
+    @classmethod
+    def tearDownClass(cls):
+        cls.srv.stop()
+        cls.srv.clean()
diff --git a/test/suites/test_ssl.py b/test/suites/test_ssl.py
index 36e172de..b7d1da97 100644
--- a/test/suites/test_ssl.py
+++ b/test/suites/test_ssl.py
@@ -1,3 +1,8 @@
+"""
+This module tests connection through SSL.
+"""
+# pylint: disable=missing-class-docstring,missing-function-docstring,too-many-branches,too-many-locals,bad-option-value,no-self-use
+
 import os
 import sys
 import unittest
@@ -24,11 +29,13 @@ def is_test_ssl():
     env = os.getenv("TEST_TNT_SSL")
     if env:
         env = env.upper()
-        return env == "1" or env == "TRUE"
+        return env in ("1", "TRUE")
     return False
 
 
 class SslTestCase:
+    # pylint: disable=too-few-public-methods,too-many-instance-attributes,too-many-arguments,too-many-positional-arguments
+
     def __init__(self,
                  name="",
                  ok=False,
@@ -69,37 +76,38 @@ def __init__(self,
         self.client_password_file = client_password_file
         self.client_auth_type = client_auth_type
 
+
 @unittest.skipIf(not is_test_ssl(), "TEST_TNT_SSL is not set.")
-class TestSuite_Ssl(unittest.TestCase):
+class TestSuiteSsl(unittest.TestCase):
     @classmethod
-    def setUpClass(self):
+    def setUpClass(cls):
         print(' SSL '.center(70, '='), file=sys.stderr)
         print('-' * 70, file=sys.stderr)
 
         test_suites_dir = os.path.dirname(__file__)
         test_data_dir = os.path.join(test_suites_dir, "..", "data")
-        self.cert_file = os.path.join(test_data_dir, "localhost.crt")
-        self.invalidhost_cert_file = os.path.join(test_data_dir,
-                                                  "invalidhost.crt")
-        self.key_file = os.path.join(test_data_dir, "localhost.key")
-        self.key_enc_file = os.path.join(test_data_dir, "localhost.enc.key")
-        self.ca_file = os.path.join(test_data_dir, "ca.crt")
-        self.empty_file = os.path.join(test_data_dir, "empty")
-        self.password = "mysslpassword"
-        self.invalid_password = "notmysslpassword"
-        self.password_file = os.path.join(test_data_dir, "passwords")
-        self.invalid_password_file = os.path.join(test_data_dir, "invalidpasswords")
-        self.invalid_file = "any_invalid_path"
+        cls.cert_file = os.path.join(test_data_dir, "localhost.crt")
+        cls.invalidhost_cert_file = os.path.join(test_data_dir,
+                                                 "invalidhost.crt")
+        cls.key_file = os.path.join(test_data_dir, "localhost.key")
+        cls.key_enc_file = os.path.join(test_data_dir, "localhost.enc.key")
+        cls.ca_file = os.path.join(test_data_dir, "ca.crt")
+        cls.empty_file = os.path.join(test_data_dir, "empty")
+        cls.password = "mysslpassword"
+        cls.invalid_password = "notmysslpassword"
+        cls.password_file = os.path.join(test_data_dir, "passwords")
+        cls.invalid_password_file = os.path.join(test_data_dir, "invalidpasswords")
+        cls.invalid_file = "any_invalid_path"
 
         # Extract the version for skips.
-        self.tnt_version = None
-        self.srv = TarantoolServer()
-        self.srv.script = 'test/suites/box.lua'
-        self.srv.start()
-        fetch_tarantool_version(self)
-        self.srv.stop()
-        self.srv.clean()
-        self.srv = None
+        cls.tnt_version = None
+        cls.srv = TarantoolServer()
+        cls.srv.script = 'test/suites/box.lua'
+        cls.srv.start()
+        fetch_tarantool_version(cls)
+        cls.srv.stop()
+        cls.srv.clean()
+        cls.srv = None
 
     def stop_srv(self, srv):
         if srv:
@@ -450,13 +458,13 @@ def test_single(self):
         for t in testcases:
             with self.subTest(msg=t.name):
                 if t.server_password is not None \
-                or t.server_password_file is not None \
-                or t.client_password is not None \
-                or t.server_password_file is not None:
+                        or t.server_password_file is not None \
+                        or t.client_password is not None \
+                        or t.server_password_file is not None:
                     skip_or_run_ssl_password_test_call(self)
 
                 if t.server_auth_type is not None \
-                or t.client_auth_type is not None:
+                        or t.client_auth_type is not None:
                     skip_or_run_auth_type_test_call(self)
 
                 srv = TarantoolServer(
@@ -567,18 +575,18 @@ def test_pool(self):
             cnt = 5
             with self.subTest(msg=t.name):
                 if t.server_password is not None \
-                or t.server_password_file is not None \
-                or t.client_password is not None \
-                or t.server_password_file is not None:
+                        or t.server_password_file is not None \
+                        or t.client_password is not None \
+                        or t.server_password_file is not None:
                     skip_or_run_ssl_password_test_call(self)
 
                 if t.server_auth_type is not None \
-                or t.client_auth_type is not None:
+                        or t.client_auth_type is not None:
                     skip_or_run_auth_type_test_call(self)
 
                 addrs = []
                 servers = []
-                for i in range(cnt):
+                for _ in range(cnt):
                     srv = TarantoolServer(
                         transport=t.server_transport,
                         ssl_key_file=t.server_key_file,
@@ -692,13 +700,13 @@ def test_mesh(self):
             cnt = 5
             with self.subTest(msg=t.name):
                 if t.server_password is not None \
-                or t.server_password_file is not None \
-                or t.client_password is not None \
-                or t.server_password_file is not None:
+                        or t.server_password_file is not None \
+                        or t.client_password is not None \
+                        or t.server_password_file is not None:
                     skip_or_run_ssl_password_test_call(self)
 
                 if t.server_auth_type is not None \
-                or t.client_auth_type is not None:
+                        or t.client_auth_type is not None:
                     skip_or_run_auth_type_test_call(self)
 
                 addrs = []
@@ -721,7 +729,7 @@ def test_mesh(self):
                     srv.admin("""
                     box.schema.user.grant('test', 'execute,read,write', 'universe')
                     """.replace('\n', ' '))
-                    srv.admin("function srv_id() return %s end" % i)
+                    srv.admin(f"function srv_id() return {i} end")
                     servers.append(srv)
                     addr = {
                         'host': srv.host,
diff --git a/test/suites/test_uuid.py b/test/suites/test_uuid.py
index f81f1117..90943fcb 100644
--- a/test/suites/test_uuid.py
+++ b/test/suites/test_uuid.py
@@ -1,58 +1,77 @@
+"""
+This module tests work with UUID type.
+"""
+# pylint: disable=missing-class-docstring,missing-function-docstring,duplicate-code
+
 import sys
 import unittest
 import uuid
+
+import pkg_resources
 import msgpack
-import warnings
-import tarantool
 
+import tarantool
 from tarantool.msgpack_ext.packer import default as packer_default
 from tarantool.msgpack_ext.unpacker import ext_hook as unpacker_ext_hook
 
 from .lib.tarantool_server import TarantoolServer
-from .lib.skip import skip_or_run_UUID_test
-from tarantool.error import MsgpackError, MsgpackWarning
+from .lib.skip import skip_or_run_uuid_test
+from .utils import assert_admin_success
+
 
-class TestSuite_UUID(unittest.TestCase):
+class TestSuiteUUID(unittest.TestCase):
     @classmethod
-    def setUpClass(self):
+    def setUpClass(cls):
         print(' UUID EXT TYPE '.center(70, '='), file=sys.stderr)
         print('-' * 70, file=sys.stderr)
-        self.srv = TarantoolServer()
-        self.srv.script = 'test/suites/box.lua'
-        self.srv.start()
+        cls.srv = TarantoolServer()
+        cls.srv.script = 'test/suites/box.lua'
+        cls.srv.start()
 
-        self.adm = self.srv.admin
-        self.adm(r"""
+        cls.adm = cls.srv.admin
+        resp = cls.adm("""
             _, uuid = pcall(require, 'uuid')
 
-            box.schema.space.create('test')
+            box.schema.space.create('test', {if_not_exists = true})
             box.space['test']:create_index('primary', {
                 type = 'tree',
                 parts = {1, 'string'},
-                unique = true})
+                unique = true,
+                if_not_exists = true})
 
-            pcall(function()
-                box.schema.space.create('test_pk')
+            box.schema.user.create('test', {password = 'test', if_not_exists = true})
+            box.schema.user.grant('test', 'read,write,execute', 'universe',
+                                  nil, {if_not_exists = true})
+
+            return true
+        """)
+        assert_admin_success(resp)
+
+        if cls.srv.admin.tnt_version >= pkg_resources.parse_version('2.4.1'):
+            resp = cls.adm("""
+                box.schema.space.create('test_pk', {if_not_exists = true})
                 box.space['test_pk']:create_index('primary', {
                     type = 'tree',
                     parts = {1, 'uuid'},
-                    unique = true})
-            end)
-
-            box.schema.user.create('test', {password = 'test', if_not_exists = true})
-            box.schema.user.grant('test', 'read,write,execute', 'universe')
-        """)
+                    unique = true,
+                    if_not_exists = true})
+                return true
+            """)
+            assert_admin_success(resp)
 
-        self.con = tarantool.Connection(self.srv.host, self.srv.args['primary'],
-                                        user='test', password='test')
+        cls.con = tarantool.Connection(cls.srv.host, cls.srv.args['primary'],
+                                       user='test', password='test')
 
     def setUp(self):
         # prevent a remote tarantool from clean our session
         if self.srv.is_started():
             self.srv.touch_lock()
 
-        self.adm("box.space['test']:truncate()")
-
+        resp = self.adm("""
+            box.space['test']:truncate()
+            return true
+        """)
+        assert_admin_success(resp)
 
     cases = {
         'uuid_1': {
@@ -83,38 +102,30 @@ def setUp(self):
     }
 
     def test_msgpack_decode(self):
-        for name in self.cases.keys():
+        for name, case in self.cases.items():
             with self.subTest(msg=name):
-                case = self.cases[name]
-
                 self.assertEqual(unpacker_ext_hook(2, case['msgpack']),
                                  case['python'])
 
-    @skip_or_run_UUID_test
+    @skip_or_run_uuid_test
     def test_tarantool_decode(self):
-        for name in self.cases.keys():
+        for name, case in self.cases.items():
             with self.subTest(msg=name):
-                case = self.cases[name]
-
                 self.adm(f"box.space['test']:replace{{'{name}', {case['tarantool']}}}")
 
                 self.assertSequenceEqual(self.con.select('test', name),
                                          [[name, case['python']]])
 
     def test_msgpack_encode(self):
-        for name in self.cases.keys():
+        for name, case in self.cases.items():
             with self.subTest(msg=name):
-                case = self.cases[name]
-
                 self.assertEqual(packer_default(case['python']),
                                  msgpack.ExtType(code=2, data=case['msgpack']))
 
-    @skip_or_run_UUID_test
+    @skip_or_run_uuid_test
     def test_tarantool_encode(self):
-        for name in self.cases.keys():
+        for name, case in self.cases.items():
             with self.subTest(msg=name):
-                case = self.cases[name]
-
                 self.con.insert('test', [name, case['python']])
 
                 lua_eval = f"""
@@ -132,17 +143,15 @@ def test_tarantool_encode(self):
 
                 self.assertSequenceEqual(self.con.eval(lua_eval), [True])
 
-
-    @skip_or_run_UUID_test
+    @skip_or_run_uuid_test
     def test_primary_key(self):
         data = [uuid.UUID('ae28d4f6-076c-49dd-8227-7f9fae9592d0'), 'content']
 
         self.assertSequenceEqual(self.con.insert('test_pk', data), [data])
         self.assertSequenceEqual(self.con.select('test_pk', data[0]), [data])
 
-
     @classmethod
-    def tearDownClass(self):
-        self.con.close()
-        self.srv.stop()
-        self.srv.clean()
+    def tearDownClass(cls):
+        cls.con.close()
+        cls.srv.stop()
+        cls.srv.clean()
diff --git a/test/suites/utils.py b/test/suites/utils.py
new file mode 100644
index 00000000..65e68b4c
--- /dev/null
+++ b/test/suites/utils.py
@@ -0,0 +1,16 @@
+"""
+Various test utilities.
+"""
+
+
+def assert_admin_success(resp):
+    """
+    Util to assert admin text request response.
+    It is expected that request last line is `return true`.
+    If something went wrong on executing, Tarantool throws an error
+    which would be a part of return values.
+    """
+
+    assert isinstance(resp, list), f'got unexpected resp type: {type(resp)}'
+    assert len(resp) > 0, 'got unexpected empty resp'
+    assert resp[0] is True, f'got unexpected resp: {resp}'