diff --git a/tests/general.test.ts b/tests/general.test.ts
index a1e5a02..082ee3d 100644
--- a/tests/general.test.ts
+++ b/tests/general.test.ts
@@ -18,7 +18,8 @@ import {
 } from './core';
 
 const serverUrl = process.env.DEEPL_SERVER_URL;
-const urlToMockRegexp = /(https?:\/\/api.*\.deepl\.com)|(deepl-mock:\d+)/;
+const urlToMockRegexp =
+    /(https?:\/\/api.*\.deepl\.com)|(deepl-mock:\d+)|(https?:\/\/localhost:\d+)/;
 
 describe('general', () => {
     it('rejects empty authKey', () => {