diff --git a/js/src/tests/traceable.test.ts b/js/src/tests/traceable.test.ts
index ce2a9e48a..9720701d1 100644
--- a/js/src/tests/traceable.test.ts
+++ b/js/src/tests/traceable.test.ts
@@ -56,6 +56,7 @@ test("404s should only log, not throw an error", async () => {
   for await (const _ of llm("Hello world")) {
     // pass
   }
+  expect(overriddenFetch).toHaveBeenCalled();
 });
 
 test("nested traceable implementation", async () => {