diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 8740687..5834b12 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -22,7 +22,7 @@ jobs:
       - run: cp -R utils/ questionservice/
       - run: cp -R errors/ statservice/
       - run: cp -R middleware/ statservice/
-      - run: cp -R utils/ statservice/
+      #- run: cp -R utils/ statservice/
       # Instalar dependencias
       - run: npm --prefix users/authservice ci
       - run: npm --prefix users/userservice ci
diff --git a/statservice/stat-service.test.js b/statservice/stat-service.test.js
index 526139c..f8f8f58 100644
--- a/statservice/stat-service.test.js
+++ b/statservice/stat-service.test.js
@@ -2,16 +2,17 @@ import request from 'supertest';
 import { MongoMemoryServer } from 'mongodb-memory-server';
 import { jest } from '@jest/globals'; // Importa jest desde @jest/globals
 
-let mongoServer;
-let app;
-
-jest.mock('./middleware/auth-middleware', () => ({
-  authenticateUser: (req, res, next) => {
-    req.user = { userId: '507f1f77bcf86cd799439011', role: 'user' }; // Simula un usuario autenticado
+// Sobrescribe `authenticateUser` antes de importar el servicio
+jest.unstable_mockModule('./middleware/auth-middleware', () => ({
+  authenticateUser: jest.fn((req, res, next) => {
+    req.user = { userId: '507f1f77bcf86cd799439011', role: 'user' };
     next();
-  },
+  }),
 }));
 
+let mongoServer;
+let app;
+
 beforeAll(async () => {
   mongoServer = await MongoMemoryServer.create();
   const mongoUri = mongoServer.getUri();
@@ -27,7 +28,6 @@ afterAll(async () => {
 describe('Stat Service', () => {
   it('should add a new stat on POST /addstat', async () => {
     const newStat = {
-      userId: '507f1f77bcf86cd799439011',
       gameId: 'testGameId',
       questionId: 'testQuestionId',
       right: false,