def METHOD_NAME(self):
    self.client.force_login(self.staff)
    self.content_with_label.labels.add(self.label)
    self.client.post(self.url, {"labels": []}, follow=True)
    self.assertNotIn(self.label, self.content_with_label.labels.all())
    self.assertNotIn(self.label, self.content_without_label.labels.all())