def METHOD_NAME(self):
    """
    Test RuntimeError is thrown when add_start_token = True and yet add_special_tokens = False
    """
    with self.assertRaises(RuntimeError):
        create_agent(
            {
                'model': 'hugging_face/dialogpt',
                'add_special_tokens': False,
                'add_start_token': True,
            }
        )