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Error in mypy on Python 3.14 #334

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Error in mypy on Python 3.14#334
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jaracocopilot-swe-agent

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@jaraco
jaraco
opened on Apr 11, 2026

I'm seeing this error when running on Python 3.14.

importlib_resources/tests/test_functional.py:243: error: Definition of "assertEndsWith" in base class "FunctionalAPIBase" is incompatible with definition in base class "TestCase"  [misc]
importlib_resources/tests/test_functional.py:252: error: Definition of "assertEndsWith" in base class "FunctionalAPIBase" is incompatible with definition in base class "TestCase"  [misc]
importlib_resources/tests/test_functional.py:261: error: Definition of "assertEndsWith" in base class "FunctionalAPIBase" is incompatible with definition in base class "TestCase"  [misc]

Activity

  1. jaraco
    assigned
    Copilot
    and
    jaraco
    on Apr 11, 2026
  2. Copilot
    linked a pull request that will close this issueRename `assertEndsWith` to `_assertEndsWith` to avoid conflict with Python 3.14's `TestCase` #335on Apr 11, 2026
  3. jaraco
    closed this as completedin 935b189on Apr 11, 2026
  4. jaraco
    added a commit that references this issue on Apr 12, 2026

    Replace UTF-16 BOM handling with a more direct helper.

    935b189
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