fixing for tests

core/views/common_views.py

@@ -86,7 +86,6 @@ class StudentReviewerApiViewSet(viewsets.ReadOnlyModelViewSet):
                 user__exercise_groups__in=self.request.user.exercise_groups.all()
             )
 
-
         else:
             return []
 
@@ -353,10 +352,8 @@ class UserAccountViewSet(viewsets.ReadOnlyModelViewSet):
         if req_user.is_student() or req_user.is_tutor():
             return Response(status.HTTP_403_FORBIDDEN)
         user = self.get_object()
-        user_groups = [GroupSerializer(group) for group in user.exercise_groups.all()]
         return Response(user.exercise_groups, status=status.HTTP_200_OK)
 
-
     @action(detail=False)
     def me(self, request):
         serializer = self.get_serializer(request.user)