python runtime_error ai_generated true

PytestWarning: Slow test detected: test_heavy_computation took 5.23s

ID: python/pytest-slow-test-warning

Also available as: JSON · Markdown · 中文
80%Fix Rate
85%Confidence
0Evidence
2025-12-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.x active — — —

Root Cause

The pytest-slow-test plugin or a custom hook flags a test that exceeds a time threshold. This is a warning, not an error, but may be treated as an error if warnings are errors.

generic

中文

pytest-slow-test 插件或自定义钩子标记了超过时间阈值的测试。这是警告而非错误，但如果警告被视为错误，则会导致失败。

Workarounds

  1. 95% success 
    Use smaller datasets, mock heavy operations, or use caching.
  2. 90% success 
    @pytest.mark.slow
def test_heavy_computation():
    ...
Run with: pytest -m 'not slow'
  3. 85% success 
    @pytest.mark.slow_test_threshold(10)
def test_heavy_computation():
    ...

Dead Ends

Common approaches that don't work:

  1. 90% fail

    This reduces coverage and may remove important test cases.

  2. 80% fail

    This masks the performance issue and may allow very slow tests to persist.

  3. 70% fail

    If warnings are errors, the test suite still fails.