python runtime_error ai_generated true

ERROR collecting tests/test_models.py E SyntaxError: invalid syntax. Perhaps you forgot a comma? tests/test_models.py:42 assert user.name == "alice" "bob"

ID: python/pytest-collection-failed-syntax

Also available as: JSON · Markdown · 中文
80%Fix Rate
90%Confidence
0Evidence
2024-11-08First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.x active — — —

Root Cause

A syntax error in a test file prevents pytest from importing it, which aborts collection for that file and shows a collection error rather than a test failure. Often caused by implicit string concatenation, missing commas, or Python 2 syntax.

generic

中文

测试文件中的语法错误导致 pytest 无法导入，从而中止该文件的收集并显示收集错误而非测试失败。通常由隐式字符串拼接、缺少逗号或 Python 2 语法引起。

Workarounds

  1. 98% success 
    python -m py_compile tests/test_models.py
# or
python -c "import ast; ast.parse(open('tests/test_models.py').read())"
  2. 95% success 
    # Wrong
assert user.name == "alice" "bob"
# Right
assert user.name in {"alice", "bob"}

Dead Ends

Common approaches that don't work:

  1. 85% fail

    -x stops on first failure; the syntax error still aborts collection and no tests run.

  2. 60% fail

    Lets other files run, but the broken file still contributes zero tests, masking the real problem.