Pin text I/O to UTF-8 and fail CI on locale-dependent reads/writes (#3296)

Co-authored-by: ShuQingDollarVoyager <57471784+ShuQingDollarVoyager@users.noreply.github.com>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
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Max 2026-08-16 12:41:53 +01:00 • committed by GitHub
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@ -99,6 +99,9 @@ jobs:
# tests/examples/test_stories_smoke.py is gated on this var; it spawns real
# stdio + uvicorn subprocesses, so run it on exactly one matrix cell.
MCP_EXAMPLES_SMOKE: ${{ matrix.os == 'ubuntu-latest' && matrix.python-version == '3.12' && matrix.dep-resolution.name == 'locked' && '1' || '' }}
# PEP 597: text I/O without encoding= raises EncodingWarning, which pytest's "error"
# filter makes fatal on every cell. An env var (not -X) so pytest-xdist workers inherit it.
PYTHONWARNDEFAULTENCODING: "1"
run: |
uv run --frozen --no-sync coverage erase
uv run --frozen --no-sync coverage run -m pytest -n auto