diff --git a/karma.conf.js b/karma.conf.js
index b888c19ac1..71da5a298f 100644
--- a/karma.conf.js
+++ b/karma.conf.js
@@ -1,7 +1,7 @@
 // Karma configuration
 // http://karma-runner.github.io/0.10/config/configuration-file.html
 
-module.exports = function(config) {
+module.exports = function karmaConfig (config) {
   config.set({
     // base path, that will be used to resolve files and exclude
     basePath: '',
@@ -29,27 +29,27 @@ module.exports = function(config) {
       'website/public/bower_components/Angular-At-Directive/src/caret.js',
       'website/public/bower_components/angular-mocks/angular-mocks.js',
       'website/public/bower_components/ngInfiniteScroll/build/ng-infinite-scroll.js',
-      "website/public/bower_components/select2/select2.js",
-      "website/public/bower_components/angular-ui-select2/src/select2.js",
+      'website/public/bower_components/select2/select2.js',
+      'website/public/bower_components/angular-ui-select2/src/select2.js',
       'website/public/bower_components/marked/lib/marked.js',
       'website/public/bower_components/js-emoji/emoji.js',
       'common/dist/scripts/habitrpg-shared.js',
 
       'test/spec/mocks/**/*.js',
 
-      "website/public/js/env.js",
-      "website/public/js/app.js",
-      "common/script/public/config.js",
-      "common/script/public/userServices.js",
-      "common/script/public/directives.js",
+      'website/public/js/env.js',
+      'website/public/js/app.js',
+      'common/script/public/config.js',
+      'common/script/public/userServices.js',
+      'common/script/public/directives.js',
 
-      "website/public/js/services/**/*.js",
-      "website/public/js/filters/**/*.js",
-      "website/public/js/directives/**/*.js",
-      "website/public/js/controllers/**/*.js",
+      'website/public/js/services/**/*.js',
+      'website/public/js/filters/**/*.js',
+      'website/public/js/directives/**/*.js',
+      'website/public/js/controllers/**/*.js',
 
       'test/spec/specHelper.js',
-      'test/spec/**/*.js'
+      'test/spec/**/*.js',
     ],
 
     // list of files / patterns to exclude
@@ -84,14 +84,14 @@ module.exports = function(config) {
 
     coverageReporter: {
       type: 'lcov',
-      dir:  'coverage/karma'
+      dir: 'coverage/karma',
     },
 
     // Enable mocha-style reporting, for better test visibility
-    reporters:  ['mocha', 'coverage'],
+    reporters: ['mocha', 'coverage'],
 
     // Continuous Integration mode
     // if true, it capture browsers, run tests and exit
-    singleRun: false
+    singleRun: false,
   });
 };
diff --git a/test/api/v2/groups/POST-groups_id_leave.test.js b/test/api/v2/groups/POST-groups_id_leave.test.js
index f7e3e0e9e6..ef5c4a8ac2 100644
--- a/test/api/v2/groups/POST-groups_id_leave.test.js
+++ b/test/api/v2/groups/POST-groups_id_leave.test.js
@@ -102,8 +102,8 @@ describe('POST /groups/:id/leave', () => {
     it('deletes the group invitations from users', async () => {
       await user.post(`/groups/${group._id}/leave`);
 
-      await expect(invitee1.get(`/user`)).to.eventually.have.deep.property('invitations.guilds').and.to.be.empty;
-      await expect(invitee2.get(`/user`)).to.eventually.have.deep.property('invitations.guilds').and.to.be.empty;
+      await expect(invitee1.get('/user')).to.eventually.have.deep.property('invitations.guilds').and.to.be.empty;
+      await expect(invitee2.get('/user')).to.eventually.have.deep.property('invitations.guilds').and.to.be.empty;
     });
   });
 
@@ -129,8 +129,8 @@ describe('POST /groups/:id/leave', () => {
     it('deletes the group invitations from users', async () => {
       await user.post(`/groups/${group._id}/leave`);
 
-      await expect(invitee1.get(`/user`)).to.eventually.have.deep.property('invitations.party').and.to.be.empty;
-      await expect(invitee2.get(`/user`)).to.eventually.have.deep.property('invitations.party').and.to.be.empty;
+      await expect(invitee1.get('/user')).to.eventually.have.deep.property('invitations.party').and.to.be.empty;
+      await expect(invitee2.get('/user')).to.eventually.have.deep.property('invitations.party').and.to.be.empty;
     });
   });
 });
diff --git a/test/api/v2/user/tasks/GET-tasks.test.js b/test/api/v2/user/tasks/GET-tasks.test.js
index 5cca2f2696..7e6f847cbb 100644
--- a/test/api/v2/user/tasks/GET-tasks.test.js
+++ b/test/api/v2/user/tasks/GET-tasks.test.js
@@ -19,7 +19,7 @@ describe('GET /user/tasks/', () => {
   });
 
   it('gets all tasks', async () => {
-    return user.get(`/user/tasks/`).then((tasks) => {
+    return user.get('/user/tasks/').then((tasks) => {
       expect(tasks).to.be.an('array');
       expect(tasks.length).to.be.greaterThan(3);