def METHOD_NAME(self, prefix_message_text):
    handler = self.make_default_handler(filters=filters.ChatType.GROUP)
    text = prefix_message_text
    assert is_match(handler, make_message_update(text, chat=Chat(-23, Chat.GROUP)))
    assert not is_match(handler, make_message_update(text, chat=Chat(23, Chat.PRIVATE)))