diff --git a/examples/starwars_relay/tests/test_objectidentification.py b/examples/starwars_relay/tests/test_objectidentification.py
index cd63dd54..87394421 100644
--- a/examples/starwars_relay/tests/test_objectidentification.py
+++ b/examples/starwars_relay/tests/test_objectidentification.py
@@ -25,6 +25,7 @@ input IntroduceShipInput {
 type IntroduceShipPayload {
   ship: Ship
   faction: Faction
+  clientMutationId: String
 }
 
 type Mutation {