diff --git a/front/package.json b/front/package.json
index 58c22a4082c4d37762c32a3e23e7edf453a7fbca..e79ffcbebab4b40238fa5aa98eae3097b1b13b1f 100644
--- a/front/package.json
+++ b/front/package.json
@@ -46,6 +46,7 @@
     "cross-env": "^4.0.0",
     "cross-spawn": "^5.0.1",
     "css-loader": "^0.28.0",
+    "es6-promise": "^4.2.2",
     "eslint": "^3.19.0",
     "eslint-config-standard": "^6.2.1",
     "eslint-friendly-formatter": "^2.0.7",
diff --git a/front/src/assets/logo/favicon.ico b/front/src/assets/logo/favicon.png
similarity index 100%
rename from front/src/assets/logo/favicon.ico
rename to front/src/assets/logo/favicon.png
diff --git a/front/src/config.js b/front/src/config.js
index 3ba1247acf21ec5564cff0b9975030c84bcb4908..76a6f5e5fdd0a5ef4756d0da2e0d96d171817b78 100644
--- a/front/src/config.js
+++ b/front/src/config.js
@@ -4,7 +4,7 @@ class Config {
     if (this.BACKEND_URL === '/') {
       this.BACKEND_URL = window.location.protocol + '//' + window.location.hostname + ':' + window.location.port
     }
-    if (!this.BACKEND_URL.endsWith('/')) {
+    if (!this.BACKEND_URL.slice(-1) === '/') {
       this.BACKEND_URL += '/'
     }
     this.API_URL = this.BACKEND_URL + 'api/v1/'
diff --git a/front/test/unit/karma.conf.js b/front/test/unit/karma.conf.js
index 3fcc5f02ac8f054bf8384927220513ebd9b89ac4..da5a2187663e2479f48a0c2ccefac20927c0f049 100644
--- a/front/test/unit/karma.conf.js
+++ b/front/test/unit/karma.conf.js
@@ -14,7 +14,10 @@ module.exports = function (config) {
     browsers: ['PhantomJS'],
     frameworks: ['mocha', 'sinon-chai', 'phantomjs-shim'],
     reporters: ['spec', 'coverage'],
-    files: ['./index.js'],
+    files: [
+      '../../node_modules/es6-promise/dist/es6-promise.auto.js',
+      './index.js'
+    ],
     preprocessors: {
       './index.js': ['webpack', 'sourcemap']
     },
diff --git a/front/test/unit/specs/Hello.spec.js b/front/test/unit/specs/Hello.spec.js
deleted file mode 100644
index 80140baa9664664d35751ce9c16e0d9ccbe75427..0000000000000000000000000000000000000000
--- a/front/test/unit/specs/Hello.spec.js
+++ /dev/null
@@ -1,11 +0,0 @@
-import Vue from 'vue'
-import Hello from '@/components/Hello'
-
-describe('Hello.vue', () => {
-  it('should render correct contents', () => {
-    const Constructor = Vue.extend(Hello)
-    const vm = new Constructor().$mount()
-    expect(vm.$el.querySelector('.hello h1').textContent)
-      .to.equal('Welcome to Your Vue.js App')
-  })
-})