diff --git a/lms/djangoapps/courseware/views.py b/lms/djangoapps/courseware/views.py
index 4489b08ca0..4a1b61758d 100644
--- a/lms/djangoapps/courseware/views.py
+++ b/lms/djangoapps/courseware/views.py
@@ -44,6 +44,8 @@ def user_groups(user):
 
     # Kill caching on dev machines -- we switch groups a lot
     group_names = cache.get(key)
+    if settings.DEBUG:
+        group_names = None
 
     if group_names is None:
         group_names = [u.name for u in UserTestGroup.objects.filter(users=user)]