def METHOD_NAME(self):
    ref = 'the wood flamed up splendidly under the large brewing copper '\
            'and it sighed so deeply'
    hyp = 'the wood flame do splendidly under the large brewing copper '\
            'and its side so deeply'
    word_error_rate = error_rate.wer(ref, hyp)
    self.assertTrue(abs(word_error_rate - 0.2666666667) < 1e-6)