def METHOD_NAME(self):
    expected_signing_key_list = [
        'AWS4-HMAC-SHA256', '20150620T010203Z',
        '20150620/us-east-1/s3/aws4_request',
        'b93e86965c269a0dfef37a8bec231ef8acf8cdb101a64eb700a46c452c1ad233'
    ]
    actual_signing_key = _get_string_to_sign(
        dt, _get_scope(dt, 'us-east-1', "s3"),
        'b93e86965c269a0dfef37a8bec231ef8acf8cdb101a64eb700a46c452c1ad233')
    self.assertEqual('\n'.join(expected_signing_key_list),
                     actual_signing_key)