F.                                                                       [100%]
=================================== FAILURES ===================================
_____________________ test_single_segment_path_is_rejected _____________________

    def test_single_segment_path_is_rejected() -> None:
        valid, message = validate_import_path_format("singlemodule")
>       assert valid is False
E       assert True is False

test_subject.py:6: AssertionError
=========================== short test summary info ============================
FAILED test_subject.py::test_single_segment_path_is_rejected - assert True is...
1 failed, 1 passed in 0.02s
