try to get pytest config work correct for windows runners

Author: evertlammerts

.github/workflows/packaging_wheels.yml

@@ -48,12 +48,12 @@ jobs:
     runs-on: ${{ matrix.platform.os }}
     env:
       CIBW_TEST_SKIP: ${{ inputs.testsuite == 'none' && '*' || '*-macosx_universal2' }}
-      CIBW_TEST_SOURCES: tests
+      CIBW_TEST_SOURCES: tests pyproject.toml
       CIBW_BEFORE_TEST: >
         uv export --only-group test --no-emit-project  --quiet --output-file pylock.toml --directory {project} &&
         uv pip install -r pylock.toml
       CIBW_TEST_COMMAND: >
-        uv run -v pytest -c {project}/pyproject.toml ${{ inputs.testsuite == 'fast' && './tests/fast' || './tests' }}
+        uv run -v pytest ${{ inputs.testsuite == 'fast' && './tests/fast' || './tests' }}
 
     steps:
       - name: Checkout DuckDB Python

pyproject.toml

@@ -305,7 +305,7 @@ dev = [ # tooling like uv will install this automatically when syncing the envir
 
 [tool.pytest.ini_options]
 minversion = "6.0"
-addopts = "-ra -p no:xdist --verbose"
+addopts = "-ra --numprocesses 4 --dist loadfile --verbose"
 testpaths = ["tests"]
 filterwarnings = [
     "error",