def METHOD_NAME():
    try:
        import ciso8601
        assert time.fast_iso8601_datetime_string_to_datetime is ciso8601.parse_rfc3339
        assert time.iso8601_datetime_string_to_datetime is ciso8601.parse_rfc3339
    except ModuleNotFoundError:
        # No speedups, test pure version has been setup correctly
        assert time.fast_iso8601_datetime_string_to_datetime is None
        assert time.iso8601_datetime_string_to_datetime is time.slow_iso8601_datetime_string_to_datetime