bash
pytest -k "user and not slow"Python Test Debugging Cheat Sheet
pytest and unittest debugging patterns for isolating failures, flaky tests, fixtures, and CI-only issues.
Export
Copy the compact sheet, download it, or print it.
Download
`D` dense toggle · `C` copy all
Selecting What to Run
Fixtures and Output
bash
pytest --setup-showbash
pytest --setup-planbash
pytest --capture=noCI and Flaky Tests
Re-run a failing test repeatedly
Loop a single test to reproduce flakiness locally.
bashANYpytestflaky
bash
while pytest tests/test_jobs.py::test_sync_worker; do :; donePrint key environment values in a test
Reveal CI-only configuration mismatches.
pythonANYpytestenvironmentci
python
import os
def test_env_debug():
print({k: os.environ.get(k) for k in ['CI', 'APP_ENV', 'DATABASE_URL']})More in Python Debugging
Python Profiling and Troubleshooting Cheat Sheet
Profile Python programs, inspect memory and imports, and diagnose slow or stuck processes.
Python Logging and Tracing Cheat Sheet
Reference for Python logging, stack traces, warning visibility, trace hooks, and instrumentation patterns.
Python pdb and Breakpoint Cheat Sheet
Focused reference for pdb commands, breakpoints, stepping, stack frames, and conditional debugging.
Python Debugging Cheat Sheet
Core Python debugging commands, traceback inspection, runtime introspection, and practical troubleshooting workflows.