diff --git a/karma.conf.js b/karma.conf.js
index 025f1170..685e2d4a 100644
--- a/karma.conf.js
+++ b/karma.conf.js
@@ -28,14 +28,15 @@ module.exports = function(config) {
 
 
         files: [
-            // System.js for module loading
-            'node_modules/systemjs/dist/system-polyfills.js',
-            'node_modules/systemjs/dist/system.src.js',
 
             // Polyfills
             'node_modules/core-js/client/shim.js',
             'node_modules/reflect-metadata/Reflect.js',
 
+            // System.js for module loading
+            'node_modules/systemjs/dist/system.js',
+
+
             // zone.js
             'node_modules/zone.js/dist/zone.js',
             'node_modules/zone.js/dist/long-stack-trace-zone.js',
diff --git a/test/backend/unit/middlewares/uesr/AuthenticationMWs.ts b/test/backend/unit/middlewares/uesr/AuthenticationMWs.ts
index cc505eac..ab510f08 100644
--- a/test/backend/unit/middlewares/uesr/AuthenticationMWs.ts
+++ b/test/backend/unit/middlewares/uesr/AuthenticationMWs.ts
@@ -4,6 +4,7 @@ import {Error, ErrorCodes} from "../../../../../common/entities/Error";
 import {UserRoles} from "../../../../../common/entities/UserDTO";
 import {ObjectManagerRepository} from "../../../../../backend/model/ObjectManagerRepository";
 import {UserManager} from "../../../../../backend/model/memory/UserManager";
+import {Config} from "../../../../../backend/config/Config";
 
 
 describe('Authentication middleware', () => {
@@ -31,6 +32,7 @@ describe('Authentication middleware', () => {
             let req:any = {
                 session: {}
             };
+            Config.Client.authenticationRequired = true;
             let res:any = {};
             let next:any = (err:Error) => {
                 expect(err).not.to.be.undefined;