def METHOD_NAME(Script):
    try:
        import redis
    except ImportError:
        pass
    else:
        pytest.skip('redis is already installed, it should only exist as a stub for this test')
    redis_path = os.path.join(typeshed.TYPESHED_PATH, 'third_party', '2and3', 'redis')
    assert os.path.isdir(redis_path)
    assert not Script('import redis').infer()