diff --git a/packages/loaders/openapi/tests/example_api.test.ts b/packages/loaders/openapi/tests/example_api.test.ts
index 7b46da4f94842..f48fb296c2501 100644
--- a/packages/loaders/openapi/tests/example_api.test.ts
+++ b/packages/loaders/openapi/tests/example_api.test.ts
@@ -909,7 +909,10 @@ describe('example_api', () => {
 
     expect(result).toMatchObject({
       data: {
-        getProductReviews: [{ timestamp: 1502787600000000n }, { timestamp: 1502787400000000n }],
+        getProductReviews: [
+          { timestamp: BigInt('1502787600000000') },
+          { timestamp: BigInt('1502787400000000') },
+        ],
       },
     });
   });