def test_conftest_uppercase(pytester: Pytester) -> None:
    """Check conftest.py whose qualified name contains uppercase characters (#5819)"""
    source = {"__init__.py": "", "Foo/conftest.py": "", "Foo/__init__.py": ""}
    pytester.makepyfile(**source)

    os.chdir(pytester.path)
    result = pytester.runpytest()
    assert result.ret == ExitCode.NO_TESTS_COLLECTED
Check conftest.py whose qualified name contains uppercase characters (#5819)
testing/test_conftest.py