def _get_local_helper_file_name(_production=False):
    """This function defines the file name of the local helper file to be used with unit testing.

    .. versionadded:: 4.1.0

    :param _production: Defines whether or not the helper file is associated with a Production environment
    :type _production: bool, None
    :returns: The file name for the local helper file
    """
    if _production is None:
        _file_name = 'helper.yml'
    else:
        _file_name = 'prod_helper.yml' if _production else 'stage_helper.yml'
    return _file_name