diff --git a/src/cron/isolated-agent/run.cron-model-override-forwarding.test.ts b/src/cron/isolated-agent/run.cron-model-override-forwarding.test.ts
index 88cb170a1fb..d9429718333 100644
--- a/src/cron/isolated-agent/run.cron-model-override-forwarding.test.ts
+++ b/src/cron/isolated-agent/run.cron-model-override-forwarding.test.ts
@@ -177,11 +177,9 @@ describe("runCronIsolatedAgentTurn — cron model override forwarding (#58065)",
     const result = await runCronIsolatedAgentTurn(makeParams());
 
     expect(result.status).toBe("ok");
-    const embeddedCall = runEmbeddedPiAgentMock.mock.calls[0]?.[0] as
-      | { provider?: string; model?: string }
-      | undefined;
-    expect(embeddedCall?.provider).toBe("google");
-    expect(embeddedCall?.model).toBe("gemini-2.0-flash");
+    const embeddedCall = firstMockArg(runEmbeddedPiAgentMock);
+    expect(embeddedCall.provider).toBe("google");
+    expect(embeddedCall.model).toBe("gemini-2.0-flash");
   });
 
   it("forwards isolated cron execution phase updates from embedded runs", async () => {