Disable persistent-grades for tests failing query counts, until TNL-5458

lms/djangoapps/instructor_task/tests/test_tasks_helper.py

@@ -1641,6 +1641,8 @@ class TestCertificateGeneration(InstructorTaskModuleTestCase):
         super(TestCertificateGeneration, self).setUp()
         self.initialize_course()
 
+    # disable persistent grades until TNL-5458 (reduces query counts)
+    @patch.dict(settings.FEATURES, {'PERSISTENT_GRADES_ENABLED_FOR_ALL_TESTS': False})
     def test_certificate_generation_for_students(self):
         """
         Verify that certificates generated for all eligible students enrolled in a course.