def METHOD_NAME(self, fake_client):
    """Same, but with an unknown error code"""
    class FakeMessage:
        is_published = False
        rc = 2342423
    with patch.object(fake_client._client, "subscribe"), patch.object(
        fake_client._client, "publish", return_value=FakeMessage()
    ):
        with pytest.raises(exceptions.MQTTError):
            fake_client.publish("abc", "123")