def make_main_and_not_covered(self) -> None:
        """Helper to create files for skip_covered scenarios."""
        self.make_file("main_file.py", """\
            import not_covered

            def normal():
                print("z")
            normal()
        """)
        self.make_file("not_covered.py", """\
            def not_covered():
                print("n")
        """)
Helper to create files for skip_covered scenarios.
tests/test_html.py