Pytest Code Review

Reviews pytest test code for async patterns, fixtures, parametrize, and mocking. Use when reviewing test_*.py files, checking async test functions, fixture usage, or mock patterns.

Quick Reference

Issue Type	Reference
async def test_*, AsyncMock, await patterns	references/async-testing.md
conftest.py, factory fixtures, scope, cleanup	references/fixtures.md
@pytest.mark.parametrize, DRY patterns	references/parametrize.md
AsyncMock tracking, patch patterns, when to mock	references/mocking.md

Review gates

Work in order. Do not assert pytest-specific problems until each applicable gate passes.

1. Scoped files — Pass when: You list every test_*.py and any conftest.py you will cite; no findings for files outside that list.
2. Async vs sync — Pass when: Per scoped file, you note whether it uses async def test_* / await; if yes, open references/async-testing.md before criticizing async usage.
3. Fixtures — Pass when: If shared setup matters, you name the conftest.py path(s) or state none; for yield fixtures, confirm cleanup exists before claiming resource leaks.
4. patch / mocks — Pass when: For any patch or mock critique, you give the import path where the symbol is used (call site), or mark N/A; open references/mocking.md when mocking is central to the review.
5. Findings — Pass when: Each finding includes a file path and line(s) or test node id, not a generic rule restatement.

Review Checklist

• Test functions are async def test_* for async code under test
• AsyncMock used for async dependencies, not Mock
• All async mocks and coroutines are awaited
• Fixtures in conftest.py for shared setup
• Fixture scope appropriate (function, class, module, session)
• Yield fixtures have proper cleanup in finally block
• @pytest.mark.parametrize for similar test cases
• No duplicated test logic across multiple test functions
• Mocks track calls properly (assert_called_once_with)
• patch() targets correct location (where used, not defined)
• No mocking of internals that should be tested
• Test isolation (no shared mutable state between tests)

When to Load References

• Reviewing async test functions → async-testing.md
• Reviewing fixtures or conftest.py → fixtures.md
• Reviewing similar test cases → parametrize.md
• Reviewing mocks and patches → mocking.md

Review Questions

1. Are all async functions tested with async def test_*?
2. Are fixtures properly scoped with appropriate cleanup?
3. Can similar test cases be parametrized to reduce duplication?
4. Are mocks tracking calls and used at the right locations?