Modern Python Testing Stack in 2026: pytest + Ruff + Coverage — Testing should be fast, clean, and automatic. Here’s the recommended stack for 2026.
Core Tools
- pytest — The standard testing framework
- Ruff — Lint + format in one tool
- coverage.py — Measure test coverage
- pytest-asyncio — For async code
Setup with uv
uv add --dev pytest pytest-asyncio coverage ruff
Recommended pyproject.toml
[tool.pytest.ini_options]
asyncio_mode = "auto"
testpaths = ["tests"]
[tool.coverage.run]
source = ["src"]
Daily Commands
uv run ruff check . --fix
uv run pytest --cov=src --cov-report=term-missing
Conclusion
Combine pytest + Ruff + coverage and you have a modern, fast testing workflow that scales well in 2026.
Also read: Modern Project Setup with uv + Ruff