def METHOD_NAME(self, *args):
    screen_unittests = self.sm.get_screen('unittests')
    images_box = screen_unittests.ids.test_images_box
    for i in self.generated_images:
        img = TestImage(
            text='Generated image by unittests: {}'.format(split(i)[1]),
            source=i,
        )
        images_box.add_widget(img)