diff --git a/extensions/xai/realtime-voice-provider.test.ts b/extensions/xai/realtime-voice-provider.test.ts
index 118a0eabb9de..11ac54a891c2 100644
--- a/extensions/xai/realtime-voice-provider.test.ts
+++ b/extensions/xai/realtime-voice-provider.test.ts
@@ -93,6 +93,9 @@ type FakeWebSocketInstance = InstanceType<typeof FakeWebSocket>;
 type SentRealtimeEvent = {
   type: string;
   audio?: string;
+  item?: {
+    type?: string;
+  };
   session?: {
     voice?: string;
     model?: string;