diff --git a/ietf/utils/test_runner.py b/ietf/utils/test_runner.py
index 417fc533b..759d94d28 100644
--- a/ietf/utils/test_runner.py
+++ b/ietf/utils/test_runner.py
@@ -114,7 +114,7 @@ template_coverage_loader.is_usable = True
 
 class RecordUrlsMiddleware(object):
     def process_request(self, request):
-        global url_coverage_collection
+        global url_coverage_collection, visited_urls
         if url_coverage_collection == True:
             visited_urls.add(request.path)