diff --git a/graphene_django/tests/test_types.py b/graphene_django/tests/test_types.py
index 5c04651..5d65551 100644
--- a/graphene_django/tests/test_types.py
+++ b/graphene_django/tests/test_types.py
@@ -73,7 +73,7 @@ type Article implements Node {
 
 type ArticleConnection {
   pageInfo: PageInfo!
-  edges: [ArticleEdge]
+  edges: [ArticleEdge]!
 }
 
 type ArticleEdge {