def check_other_config_need_prefixes(self, fname: str) -> None:
        """Check that `fname` sections won't be read if un-prefixed."""
        self.make_file(fname, """\
            [run]
            omit = bar
            branch = true
            """)
        cov = coverage.Coverage()
        assert cov.config.run_omit == []
        assert cov.config.branch is False
Check that `fname` sections won't be read if un-prefixed.
tests/test_config.py