diff --git a/jest.config.js b/jest.config.js
index 4857b64..17340db 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -4,23 +4,22 @@ const SVELTE_TRANSFORM_PATTERN =
   SVELTE_VERSION >= '5' ? '^.+\\.svelte(?:\\.js)?$' : '^.+\\.svelte$'
 
 export default {
-  testMatch: ['<rootDir>/src/__tests__/**/*.test.js'],
+  testMatch: ['<rootDir>/tests/**/*.test.js'],
   transform: {
     [SVELTE_TRANSFORM_PATTERN]: 'svelte-jester',
   },
   moduleFileExtensions: ['js', 'svelte'],
   extensionsToTreatAsEsm: ['.svelte'],
   testEnvironment: 'jsdom',
-  setupFilesAfterEnv: ['<rootDir>/src/__tests__/_jest-setup.js'],
-  injectGlobals: false,
+  setupFilesAfterEnv: ['<rootDir>/tests/_jest-setup.js'],
+  injectGlobals: true,
   moduleNameMapper: {
-    '^vitest$': '<rootDir>/src/__tests__/_jest-vitest-alias.js',
+    '^vitest$': '<rootDir>/tests/_jest-vitest-alias.js',
   },
   resetMocks: true,
   restoreMocks: true,
   collectCoverageFrom: ['<rootDir>/src/**/*'],
   coveragePathIgnorePatterns: [
-    '/__tests__/',
     '<rootDir>/src/vite.js',
     '<rootDir>/src/vitest.js',
   ],
diff --git a/package.json b/package.json
index cada7e0..2a93d91 100644
--- a/package.json
+++ b/package.json
@@ -49,8 +49,7 @@
   ],
   "files": [
     "src",
-    "types",
-    "!__tests__"
+    "types"
   ],
   "scripts": {
     "all": "npm-run-all contributors:generate toc format types build test:vitest:* test:jest",
@@ -129,5 +128,6 @@
     "typescript": "^5.5.3",
     "vite": "^4.0.0 || ^5.3.3",
     "vitest": "^1.0.0 || ^2.0.2"
-  }
+  },
+  "packageManager": "pnpm@9.15.0+sha512.76e2379760a4328ec4415815bcd6628dee727af3779aaa4c914e3944156c4299921a89f976381ee107d41f12cfa4b66681ca9c718f0668fa0831ed4c6d8ba56c"
 }
diff --git a/pnpm-workspace.yaml b/pnpm-workspace.yaml
new file mode 100644
index 0000000..6b70011
--- /dev/null
+++ b/pnpm-workspace.yaml
@@ -0,0 +1,3 @@
+packages:
+  - ./
+  - ./tests
diff --git a/src/__tests__/auto-cleanup.test.js b/src/__tests__/auto-cleanup.test.js
deleted file mode 100644
index 7962925..0000000
--- a/src/__tests__/auto-cleanup.test.js
+++ /dev/null
@@ -1,42 +0,0 @@
-import { afterEach, beforeEach, describe, expect, test, vi } from 'vitest'
-
-import { IS_JEST } from './utils.js'
-
-// TODO(mcous, 2024-12-08): clearing module cache and re-importing
-// in Jest breaks Svelte's environment checking heuristics.
-// Re-implement this test in a more accurate environment, without mocks.
-describe.skipIf(IS_JEST)('auto-cleanup', () => {
-  const globalAfterEach = vi.fn()
-
-  beforeEach(() => {
-    vi.resetModules()
-    globalThis.afterEach = globalAfterEach
-  })
-
-  afterEach(() => {
-    delete process.env.STL_SKIP_AUTO_CLEANUP
-    delete globalThis.afterEach
-  })
-
-  test('calls afterEach with cleanup if globally defined', async () => {
-    const { render } = await import('../index.js')
-
-    expect(globalAfterEach).toHaveBeenCalledTimes(1)
-    expect(globalAfterEach).toHaveBeenLastCalledWith(expect.any(Function))
-    const globalCleanup = globalAfterEach.mock.lastCall[0]
-
-    const { default: Comp } = await import('./fixtures/Comp.svelte')
-    render(Comp, { props: { name: 'world' } })
-    await globalCleanup()
-
-    expect(document.body).toBeEmptyDOMElement()
-  })
-
-  test('does not call afterEach if process STL_SKIP_AUTO_CLEANUP is set', async () => {
-    process.env.STL_SKIP_AUTO_CLEANUP = 'true'
-
-    await import('../index.js')
-
-    expect(globalAfterEach).toHaveBeenCalledTimes(0)
-  })
-})
diff --git a/src/__tests__/_jest-setup.js b/tests/_jest-setup.js
similarity index 100%
rename from src/__tests__/_jest-setup.js
rename to tests/_jest-setup.js
diff --git a/src/__tests__/_jest-vitest-alias.js b/tests/_jest-vitest-alias.js
similarity index 100%
rename from src/__tests__/_jest-vitest-alias.js
rename to tests/_jest-vitest-alias.js
diff --git a/src/__tests__/_vitest-setup.js b/tests/_vitest-setup.js
similarity index 100%
rename from src/__tests__/_vitest-setup.js
rename to tests/_vitest-setup.js
diff --git a/src/__tests__/act.test.js b/tests/act.test.js
similarity index 100%
rename from src/__tests__/act.test.js
rename to tests/act.test.js
diff --git a/src/__tests__/cleanup.test.js b/tests/cleanup.test.js
similarity index 100%
rename from src/__tests__/cleanup.test.js
rename to tests/cleanup.test.js
diff --git a/src/__tests__/context.test.js b/tests/context.test.js
similarity index 100%
rename from src/__tests__/context.test.js
rename to tests/context.test.js
diff --git a/src/__tests__/debug.test.js b/tests/debug.test.js
similarity index 100%
rename from src/__tests__/debug.test.js
rename to tests/debug.test.js
diff --git a/src/__tests__/events.test.js b/tests/events.test.js
similarity index 100%
rename from src/__tests__/events.test.js
rename to tests/events.test.js
diff --git a/src/__tests__/fixtures/Comp.svelte b/tests/fixtures/Comp.svelte
similarity index 100%
rename from src/__tests__/fixtures/Comp.svelte
rename to tests/fixtures/Comp.svelte
diff --git a/src/__tests__/fixtures/CompRunes.svelte b/tests/fixtures/CompRunes.svelte
similarity index 100%
rename from src/__tests__/fixtures/CompRunes.svelte
rename to tests/fixtures/CompRunes.svelte
diff --git a/src/__tests__/fixtures/Context.svelte b/tests/fixtures/Context.svelte
similarity index 100%
rename from src/__tests__/fixtures/Context.svelte
rename to tests/fixtures/Context.svelte
diff --git a/src/__tests__/fixtures/Mounter.svelte b/tests/fixtures/Mounter.svelte
similarity index 100%
rename from src/__tests__/fixtures/Mounter.svelte
rename to tests/fixtures/Mounter.svelte
diff --git a/src/__tests__/fixtures/Transitioner.svelte b/tests/fixtures/Transitioner.svelte
similarity index 100%
rename from src/__tests__/fixtures/Transitioner.svelte
rename to tests/fixtures/Transitioner.svelte
diff --git a/src/__tests__/fixtures/Typed.svelte b/tests/fixtures/Typed.svelte
similarity index 100%
rename from src/__tests__/fixtures/Typed.svelte
rename to tests/fixtures/Typed.svelte
diff --git a/src/__tests__/fixtures/TypedRunes.svelte b/tests/fixtures/TypedRunes.svelte
similarity index 100%
rename from src/__tests__/fixtures/TypedRunes.svelte
rename to tests/fixtures/TypedRunes.svelte
diff --git a/src/__tests__/mount.test.js b/tests/mount.test.js
similarity index 100%
rename from src/__tests__/mount.test.js
rename to tests/mount.test.js
diff --git a/src/__tests__/multi-base.test.js b/tests/multi-base.test.js
similarity index 100%
rename from src/__tests__/multi-base.test.js
rename to tests/multi-base.test.js
diff --git a/src/__tests__/render-runes.test-d.ts b/tests/render-runes.test-d.ts
similarity index 96%
rename from src/__tests__/render-runes.test-d.ts
rename to tests/render-runes.test-d.ts
index 2d0c69f..a9ce31c 100644
--- a/src/__tests__/render-runes.test-d.ts
+++ b/tests/render-runes.test-d.ts
@@ -1,7 +1,7 @@
+import * as subject from '@testing-library/svelte'
 import { expectTypeOf } from 'expect-type'
 import { describe, test } from 'vitest'
 
-import * as subject from '../index.js'
 import Component from './fixtures/TypedRunes.svelte'
 
 describe('types', () => {
diff --git a/src/__tests__/render-utilities.test-d.ts b/tests/render-utilities.test-d.ts
similarity index 97%
rename from src/__tests__/render-utilities.test-d.ts
rename to tests/render-utilities.test-d.ts
index b45614e..72e2a67 100644
--- a/src/__tests__/render-utilities.test-d.ts
+++ b/tests/render-utilities.test-d.ts
@@ -1,7 +1,7 @@
+import * as subject from '@testing-library/svelte'
 import { expectTypeOf } from 'expect-type'
 import { describe, test } from 'vitest'
 
-import * as subject from '../index.js'
 import Component from './fixtures/Comp.svelte'
 
 describe('render query and utility types', () => {
diff --git a/src/__tests__/render.test-d.ts b/tests/render.test-d.ts
similarity index 97%
rename from src/__tests__/render.test-d.ts
rename to tests/render.test-d.ts
index 08cad70..07df5a9 100644
--- a/src/__tests__/render.test-d.ts
+++ b/tests/render.test-d.ts
@@ -1,8 +1,8 @@
+import * as subject from '@testing-library/svelte'
 import { expectTypeOf } from 'expect-type'
 import { ComponentProps } from 'svelte'
 import { describe, test } from 'vitest'
 
-import * as subject from '../index.js'
 import Component from './fixtures/Typed.svelte'
 
 describe('types', () => {
diff --git a/src/__tests__/render.test.js b/tests/render.test.js
similarity index 100%
rename from src/__tests__/render.test.js
rename to tests/render.test.js
diff --git a/src/__tests__/rerender.test.js b/tests/rerender.test.js
similarity index 100%
rename from src/__tests__/rerender.test.js
rename to tests/rerender.test.js
diff --git a/src/__tests__/transition.test.js b/tests/transition.test.js
similarity index 100%
rename from src/__tests__/transition.test.js
rename to tests/transition.test.js
diff --git a/src/__tests__/utils.js b/tests/utils.js
similarity index 100%
rename from src/__tests__/utils.js
rename to tests/utils.js
diff --git a/src/__tests__/vite-plugin.test.js b/tests/vite-plugin.test.js
similarity index 99%
rename from src/__tests__/vite-plugin.test.js
rename to tests/vite-plugin.test.js
index 9232f65..c1a2031 100644
--- a/src/__tests__/vite-plugin.test.js
+++ b/tests/vite-plugin.test.js
@@ -1,6 +1,6 @@
 import { beforeEach, describe, expect, test, vi } from 'vitest'
 
-import { svelteTesting } from '../vite.js'
+import { svelteTesting } from '../src/vite.js'
 import { IS_JEST } from './utils.js'
 
 describe.skipIf(IS_JEST)('vite plugin', () => {
diff --git a/tsconfig.build.json b/tsconfig.build.json
index 0baa218..0cc73fd 100644
--- a/tsconfig.build.json
+++ b/tsconfig.build.json
@@ -8,5 +8,5 @@
     "rootDir": "src",
     "outDir": "types"
   },
-  "exclude": ["src/**/__tests__/**"]
+  "exclude": ["tests"]
 }
diff --git a/tsconfig.json b/tsconfig.json
index f79cace..b56dc40 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -7,5 +7,5 @@
     "strict": true,
     "types": ["svelte", "vite/client", "vitest", "vitest/globals"]
   },
-  "include": ["src"]
+  "include": ["src", "tests"]
 }
diff --git a/tsconfig.legacy.json b/tsconfig.legacy.json
index b5d9e57..304d872 100644
--- a/tsconfig.legacy.json
+++ b/tsconfig.legacy.json
@@ -1,8 +1,8 @@
 {
   "extends": ["./tsconfig.json"],
   "exclude": [
-    "src/__tests__/render-runes.test-d.ts",
-    "src/__tests__/fixtures/CompRunes.svelte",
-    "src/__tests__/fixtures/TypedRunes.svelte"
+    "tests/render-runes.test-d.ts",
+    "tests/fixtures/CompRunes.svelte",
+    "tests/fixtures/TypedRunes.svelte"
   ]
 }
diff --git a/vite.config.js b/vite.config.js
index 1ddeea5..086aeba 100644
--- a/vite.config.js
+++ b/vite.config.js
@@ -1,21 +1,20 @@
 import { svelte } from '@sveltejs/vite-plugin-svelte'
+import { svelteTesting } from '@testing-library/svelte/vite'
 import { defineConfig } from 'vite'
 
-import { svelteTesting } from './src/vite.js'
-
 // https://vitejs.dev/config/
 export default defineConfig({
   plugins: [svelte(), svelteTesting()],
   test: {
     environment: 'jsdom',
-    setupFiles: ['./src/__tests__/_vitest-setup.js'],
+    setupFiles: ['./tests/_vitest-setup.js'],
     mockReset: true,
     unstubGlobals: true,
     unstubEnvs: true,
     coverage: {
       provider: 'v8',
       include: ['src/**/*'],
-      exclude: ['**/__tests__/**', 'src/vite.js', 'src/vitest.js'],
+      exclude: ['src/vitest.js'],
     },
   },
 })