def METHOD_NAME(self):
    s = '[{"a_key": 1, "b_\xe9": 2}, {"a_key": 3, "b_\xe9": 4}]'
    self.check_keys_reuse(s, self.loads)
    decoder = self.json.decoder.JSONDecoder()
    self.check_keys_reuse(s, decoder.decode)
    self.assertFalse(decoder.memo)