diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
index c49d0fab45f..069c52f3afa 100644
--- a/.github/copilot-instructions.md
+++ b/.github/copilot-instructions.md
@@ -9,8 +9,8 @@ Your environment has all extra dependencies and groups installed, on Python 3.13
 and for any scripts or tools you need to run.
 
 Some example commands on `uv`:
-- `uv sync --all-extras --all-groups` to install all dependencies and groups required by the project.
-- `uv run -p 3.14 --all-groups --all-extras tests/` to run tests on a specific Python version. Please use the `-p` flag often.
+- `uv sync --all-extras --all-groups --locked` to install all dependencies and groups required by the project.
+- `uv run -p 3.14 --all-groups --all-extras --locked tests/` to run tests on a specific Python version. Please use the `-p` flag often.
 - `uv pip install <package>` to install a package in the current environment.
 
 If uv is somehow not available, you can install it using `pip install uv`.
diff --git a/.github/workflows/copilot-setup-steps.yml b/.github/workflows/copilot-setup-steps.yml
index bf082c40ad9..58672d181e7 100644
--- a/.github/workflows/copilot-setup-steps.yml
+++ b/.github/workflows/copilot-setup-steps.yml
@@ -39,7 +39,7 @@ jobs:
           python-version: 3.13
 
       - name: Install the project
-        run: uv sync --all-extras --all-groups
+        run: uv sync --all-extras --all-groups --locked
     
       - name: Install linting dependencies
         # Make sure the pinned versions here match the ones in .pre-commit-config.yaml
diff --git a/changes/unreleased/4915.D3x6MoyYYDaUcB7jmLUyeY.toml b/changes/unreleased/4915.D3x6MoyYYDaUcB7jmLUyeY.toml
new file mode 100644
index 00000000000..a38d8d3facd
--- /dev/null
+++ b/changes/unreleased/4915.D3x6MoyYYDaUcB7jmLUyeY.toml
@@ -0,0 +1,5 @@
+internal = "Don't update ``uv.lock`` in copilot runtime environment"
+[[pull_requests]]
+uid = "4915"
+author_uid = "harshil21"
+closes_threads = []