From fe86a64c6c6aa75481bffe5880b5c4e35ea67927 Mon Sep 17 00:00:00 2001
From: Vladimir <sleuths.slews0s@icloud.com>
Date: Thu, 15 Oct 2026 12:41:30 +0200
Subject: [PATCH] fix: skip builtin loading in async leak detector (#11598)

---
 packages/vitest/src/runtime/detect-async-leaks.ts | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/packages/vitest/src/runtime/detect-async-leaks.ts b/packages/vitest/src/runtime/detect-async-leaks.ts
index c0bdc4bd3..c291edabb 100644
--- a/packages/vitest/src/runtime/detect-async-leaks.ts
+++ b/packages/vitest/src/runtime/detect-async-leaks.ts
@@ -47,6 +47,11 @@ export function detectAsyncLeaks(
         Error.stackTraceLimit = limit
       }
 
+      // a builtin loaded on first use can create pending promises at the module level
+      if (stack.includes('node:internal/bootstrap/realm')) {
+        return
+      }
+
       if (!stack.includes(testFile)) {
         const trigger = resources.get(triggerAsyncId)
 
-- 
2.54.0