feat(test): Upgrade pytest to version 9.x

[Tim020]

Summary

• Upgraded pytest from <8.5 to <9.1 to adopt the latest testing framework features
• Updated pytest-asyncio to >=1.3.0 for pytest 9 compatibility
• All tests pass successfully with no breaking changes

Motivation

pytest 9.0 was released on November 5, 2025, bringing improvements and bug fixes. This upgrade ensures we stay current with the testing framework and avoid future compatibility issues.

Key Changes

Dependency	Previous	New
pytest	<8.5	<9.1
pytest-asyncio	(unpinned)	>=1.3.0

Breaking Changes Analysis

After thorough analysis, none of the pytest 9.0 breaking changes affect our codebase:

• ✅ Python 3.9 dropped - We use Python >=3.13
• ✅ Test function yields - Our @gen_test decorated tests use Tornado's gen-based coroutines (valid)
• ✅ Duplicate path arguments - Not relevant to our usage
• ✅ CI mode detection - May need verification in CI/CD

Testing Results

============================= test session starts ==============================
platform darwin -- Python 3.13.2, pytest-9.0.1, pluggy-1.6.0
collected 31 items

31 passed, 733 warnings in 7.18s

• ✅ All 31 tests pass
• ✅ No pytest-specific deprecation warnings
• ✅ Verified compatibility with:
  • Tornado AsyncHTTPTestCase tests
  • pytest-asyncio async tests
  • pytest fixtures

Note: The 733 warnings are all from SQLAlchemy (unrelated to pytest upgrade)

Test Plan

• Run full test suite locally
• Check for pytest deprecation warnings
• Verify async test compatibility
• Verify CI/CD pipeline passes
• Monitor for any edge cases in production use

References

• pytest 9.0.0 Release Notes
• pytest-asyncio 1.3.0 Release

🤖 Generated with Claude Code

[github-actions]

Test Results

31 tests   31 ✅  8s ⏱️
 1 suites   0 💤
 1 files     0 ❌

Results for commit 00f56e9.