def METHOD_NAME(fixtures_dir):
    with util.copied_fixtures_dir(fixtures_dir):
        t = templates.Templates(PYTHON_LIBRARY)
        result = t.render(".github/release-please.yml")
        os.makedirs(".github")
        shutil.copy(result, Path(".github/release-please.yml"))
        python.configure_previous_major_version_branches()
        release_please_yml = Path(".github/release-please.yml").read_text()
        assert (
            release_please_yml
            == """releaseType: python