fix: fix setImmediate await in detect-async-leak (#10608)

hi-ogawa · web-flow · commit dd62b84e0050 · 2026-06-16T15:40:03.000+09:00
Co-authored-by: Hiroshi Ogawa &lt;4232207+hi-ogawa@users.noreply.github.com&gt;
diff --git a/packages/vitest/src/runtime/detect-async-leaks.ts b/packages/vitest/src/runtime/detect-async-leaks.ts
@@ -76,7 +76,7 @@ export function detectAsyncLeaks(testFile: string, projectName: string): () => P
   hook.enable()
 
   return async function collect() {
-    await Promise.resolve(setImmediate)
+    await new Promise<void>(resolve => setImmediate(resolve))
 
     hook.disable()
 
