def METHOD_NAME(self) -> None:
    for unit in unit_test_specs:
        if unit.is_masked:
            masked_unit = ADMIN_ROOT / unit.name
            # Yes, systemd (at least in v243) is OK with a relative link
            self.assertEqual(os.readlink(masked_unit), b"../../../dev/null")
    self.assertEqual(
        os.readlink(TMPFILES_ROOT / "testconfig.conf"), b"../../dev/null"
    )