diff --git a/src/spec/util.spec.ts b/src/spec/util.spec.ts
index 7b14f59..c28c3bc 100644
--- a/src/spec/util.spec.ts
+++ b/src/spec/util.spec.ts
@@ -4,7 +4,7 @@ import { describe, expect, test } from 'vitest';
 describe('util', () => {
   describe('nextFrame', () => {
     test('should resolve', async () => {
-      expect(nextFrame()).resolves;
+      await expect(nextFrame()).resolves.toEqual(undefined);
     });
   });
 });