python module_error ai_generated true

E ModuleNotFoundError: No module named 'tests.test_utils'

ID: python/pytest-import-mismatch-local-module

Also available as: JSON · Markdown · 中文
80%Fix Rate
86%Confidence
0Evidence
2025-04-10First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.x active — — —

Root Cause

A test module tries to import another test module as a package, but the tests directory is not a package (missing __init__.py) or the import path is incorrect.

generic

中文

测试模块尝试将另一个测试模块作为包导入，但 tests 目录不是包（缺少 __init__.py）或导入路径不正确。

Workarounds

  1. 90% success 
    In conftest.py at project root:

import sys
from pathlib import Path
sys.path.insert(0, str(Path(__file__).parent))
  2. 95% success 
    pip install -e .
Then in tests: from mypackage.tests.test_utils import helper
  3. 85% success 
    Create a test_utils package at the project root and import from it:
from test_utils import helper

Dead Ends

Common approaches that don't work:

  1. 60% fail

    This makes tests a package but can cause import conflicts with pytest's rootdir and may break other imports.

  2. 70% fail

    Relative imports only work within packages; if tests is not a package, this fails.

  3. 80% fail

    This is brittle and may not work consistently across different working directories.