diff --git a/graphene/types/tests/test_jsontype.py b/graphene/types/tests/test_jsontype.py
index 4308d9ac..b56fcf28 100644
--- a/graphene/types/tests/test_jsontype.py
+++ b/graphene/types/tests/test_jsontype.py
@@ -71,7 +71,7 @@ def test_json_parse_literal_query():
                     key_a: "a",
                     key_b: "b"
                 },
-                empty_key: null
+                empty_key: undefined
             })
         }
         '''