def METHOD_NAME(self):
    with transaction.atomic():
        image = get_image_model().objects.create(
            title="Test Image", file=get_test_image_file()
        )
        filename = image.file.name
        self.assertTrue(image.file.storage.exists(filename))
        image.delete()
        self.assertTrue(image.file.storage.exists(filename))
    self.assertFalse(image.file.storage.exists(filename))