    def test_reset_date(self):
        self.test_change_due_date()
        url = reverse('reset_due_date', kwargs={'course_id': self.course.id.to_deprecated_string()})
        response = self.client.get(url, {
            'student': self.user1.username,
            'url': self.week1.location.to_deprecated_string(),
        })
        self.assertEqual(response.status_code, 200, response.content)
        self.assertEqual(
            None,
            get_extended_due(self.course, self.week1, self.user1)
        )