diff --git a/lms/djangoapps/open_ended_grading/staff_grading_service.py b/lms/djangoapps/open_ended_grading/staff_grading_service.py
index e16f8c9e08..226bdbc389 100644
--- a/lms/djangoapps/open_ended_grading/staff_grading_service.py
+++ b/lms/djangoapps/open_ended_grading/staff_grading_service.py
@@ -55,7 +55,7 @@ class MockStaffGradingService(object):
         ]})
 
 
-    def save_grade(self, course_id, grader_id, submission_id, score, feedback, skipped):
+    def save_grade(self, course_id, grader_id, submission_id, score, feedback, skipped, rubric_scores):
         return self.get_next(course_id, 'fake location', grader_id)
 
 
diff --git a/lms/djangoapps/open_ended_grading/tests.py b/lms/djangoapps/open_ended_grading/tests.py
index 0c4376a44b..059a8939a2 100644
--- a/lms/djangoapps/open_ended_grading/tests.py
+++ b/lms/djangoapps/open_ended_grading/tests.py
@@ -94,7 +94,8 @@ class TestStaffGradingService(ct.PageLoader):
         data = {'score': '12',
                 'feedback': 'great!',
                 'submission_id': '123',
-                'location': self.location}
+                'location': self.location,
+                'rubric_scores[]': ['1', '2']}
         r = self.check_for_post_code(200, url, data)
         d = json.loads(r.content)
         self.assertTrue(d['success'], str(d))