def METHOD_NAME(self):
    """test with no invertible stack"""
    transforms = Compose(
        [EnsureChannelFirstd("image", channel_dim="no_channel"), RandScaleIntensityd("image", 0.1, prob=1.0)]
    )
    with self.assertWarns(UserWarning):
        tta = TestTimeAugmentation(transforms, 1, 0, orig_key="image")
        tta(self.get_data(1, (20, 20), data_type=np.float32))