diff --git a/extensions/litellm/image-generation-provider.test.ts b/extensions/litellm/image-generation-provider.test.ts
index e15a5d7e942..e6a6997f920 100644
--- a/extensions/litellm/image-generation-provider.test.ts
+++ b/extensions/litellm/image-generation-provider.test.ts
@@ -193,7 +193,7 @@ describe("litellm image generation provider", () => {
     });
 
     expect(mockObjectArg(postJsonRequestMock).url).toBe("http://localhost:4000/images/edits");
-    const call = postJsonRequestMock.mock.calls.at(0)?.[0] as { body: { images: unknown[] } };
+    const call = postJsonRequestMock.mock.calls[0]?.[0] as { body: { images: unknown[] } };
     expect(call.body.images).toHaveLength(1);
   });