From 41a4a7cce4591340893c9ecc9c7c7bf6a26c4b54 Mon Sep 17 00:00:00 2001
From: Aras Abbasi <aras.abbasi@googlemail.com>
Date: Tue, 26 Aug 2025 21:30:13 +0200
Subject: [PATCH] fix: avoid instanceof MockNotMatchedError

---
 lib/mock/mock-utils.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/mock/mock-utils.js b/lib/mock/mock-utils.js
index 822d45d153f..8f72ef07414 100644
--- a/lib/mock/mock-utils.js
+++ b/lib/mock/mock-utils.js
@@ -367,7 +367,7 @@ function buildMockDispatch () {
       try {
         mockDispatch.call(this, opts, handler)
       } catch (error) {
-        if (error instanceof MockNotMatchedError) {
+        if (error.code === 'UND_MOCK_ERR_MOCK_NOT_MATCHED') {
           const netConnect = agent[kGetNetConnect]()
           if (netConnect === false) {
             throw new MockNotMatchedError(`${error.message}: subsequent request to origin ${origin} was not allowed (net.connect disabled)`)