    def test_list_entrance_exam_instructor_with_invalid_exam_key(self):
        """ Test list task history for entrance exam failure if course has invalid exam. """
        url = reverse('list_entrance_exam_instructor_tasks',
                      kwargs={'course_id': unicode(self.course_with_invalid_ee.id)})
        response = self.client.get(url, {
            'unique_student_identifier': self.student.email,
        })
        self.assertEqual(response.status_code, 400)
The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request.