async def METHOD_NAME(self, model_repo_ext):
    assert model_repo_ext.index() == [
        {
            "name": self.MODEL_NAME,
            "reason": "",
            "state": "Ready"
        }
    ]
    # Deploy another model
    model = DummyModel("TestModel_2")
    # model.load()  # TestModel_2 is not loaded i.e. NotReady
    model_repo_ext._model_registry.update(model)
    assert model_repo_ext.index() == [
        {
            "name": self.MODEL_NAME,
            "reason": "",
            "state": "Ready"
        },
        {
            "name": "TestModel_2",
            "reason": "",
            "state": "NotReady"
        }
    ]
    # List only ready models
    assert model_repo_ext.index(filter_ready=True) == [
        {
            "name": self.MODEL_NAME,
            "reason": "",
            "state": "Ready"
        }
    ]