diff --git a/frontend-js/src/main/js/gui/export/AbstractExportPanel.js b/frontend-js/src/main/js/gui/export/AbstractExportPanel.js
index 1f0cb52ca941f443a321813a5f5cb3c5c4727e6c..bb1055d37660576e7caa4a26fbec3c4c3598b7d7 100644
--- a/frontend-js/src/main/js/gui/export/AbstractExportPanel.js
+++ b/frontend-js/src/main/js/gui/export/AbstractExportPanel.js
@@ -38,16 +38,16 @@ AbstractExportPanel.prototype._createMiriamTypeDiv = function (annotations) {
   var typeDiv = Functions.createElement({
     type: "div",
     name: "miriamSelectDiv",
-    className: "minerva-export-dual-listbox-container",
+    className: "minerva-export-dual-listbox-container"
   });
   typeDiv.appendChild(Functions.createElement({
     type: "h4",
-    content: " Annotations:",
+    content: " Annotations:"
   }));
 
   var selectElement = Functions.createElement({
     type: "select",
-    className: "minerva-multi-select",
+    className: "minerva-multi-select"
   });
   typeDiv.appendChild(selectElement);
 
@@ -94,7 +94,7 @@ AbstractExportPanel.prototype.createDualListbox = function (selectElement) {
 AbstractExportPanel.prototype._createSelectTypeDiv = function (elementTypes) {
   var typeDiv = Functions.createElement({
     type: "div",
-    name: "typeSelectDiv",
+    name: "typeSelectDiv"
   });
   typeDiv.appendChild(Functions.createElement({
     type: "h4",
@@ -156,11 +156,11 @@ AbstractExportPanel.prototype.getMiriamTypesDualListbox = function () {
 AbstractExportPanel.prototype._createSelectColumnDiv = function (columnTypes) {
   var columnDiv = Functions.createElement({
     type: "div",
-    name: "columnSelectDiv",
+    name: "columnSelectDiv"
   });
   columnDiv.appendChild(Functions.createElement({
     type: "h4",
-    content: " COLUMN:",
+    content: " COLUMN:"
   }));
   var choicesContainer = Functions.createElement({
     type: "ul",
@@ -279,7 +279,7 @@ AbstractExportPanel.prototype._createDownloadButton = function () {
   var downloadDiv = Functions.createElement({
     type: "div",
     name: "downloadDiv",
-    style: "clear:both; padding: 10px;",
+    style: "clear:both; padding: 10px;"
   });
   var button = Functions.createElement({
     type: "button",
@@ -299,7 +299,7 @@ AbstractExportPanel.prototype._createDownloadButton = function () {
         GuiConnector.hideProcessing();
         GuiConnector.alert(error);
       });
-    },
+    }
   });
   downloadDiv.appendChild(button);
 
@@ -316,18 +316,18 @@ AbstractExportPanel.prototype._createSelectIncludedCompartmentDiv = function ()
   var typeDiv = Functions.createElement({
     type: "div",
     name: "includedCompartmentSelectDiv",
-    className: "minerva-export-dual-listbox-container",
+    className: "minerva-export-dual-listbox-container"
   });
   typeDiv.appendChild(Functions.createElement({
     type: "h4",
-    content: " Included compartment/pathways:",
+    content: " Included compartment/pathways:"
   }));
 
   return self._getCompartmentNames().then(function (compartmentNames) {
 
     var selectElement = Functions.createElement({
       type: "select",
-      className: "minerva-multi-select",
+      className: "minerva-multi-select"
     });
     typeDiv.appendChild(selectElement);
 
@@ -349,18 +349,18 @@ AbstractExportPanel.prototype._createSelectExcludedCompartmentDiv = function ()
   var typeDiv = Functions.createElement({
     type: "div",
     name: "excludedCompartmentSelectDiv",
-    className: "minerva-export-dual-listbox-container",
+    className: "minerva-export-dual-listbox-container"
   });
   typeDiv.appendChild(Functions.createElement({
     type: "h4",
-    content: " Excluded compartment/pathways:",
+    content: " Excluded compartment/pathways:"
   }));
 
   return self._getCompartmentNames().then(function (compartmentNames) {
 
     var selectElement = Functions.createElement({
       type: "select",
-      className: "minerva-multi-select",
+      className: "minerva-multi-select"
     });
     typeDiv.appendChild(selectElement);
 
diff --git a/frontend-js/src/main/js/map/data/UserPreferences.js b/frontend-js/src/main/js/map/data/UserPreferences.js
index 4612cdb8663c69e9da93602bca6eff07976c3c71..ac5cc24f62e986a2ca9bd855a440d6c5d60c3c36 100644
--- a/frontend-js/src/main/js/map/data/UserPreferences.js
+++ b/frontend-js/src/main/js/map/data/UserPreferences.js
@@ -59,7 +59,7 @@ UserPreferences.prototype.getElementValidAnnotations = function (className) {
   return this._elementValidAnnotations[className];
 };
 
-UserPreferences.prototype.toExport = function (className) {
+UserPreferences.prototype.toExport = function () {
   return {
     "project-upload": {
       "auto-resize": this._projectUpload.autoResize,
diff --git a/frontend-js/src/test/js/helper.js b/frontend-js/src/test/js/helper.js
index 47c121d93f8026b52257cb4b97ac9a328c31376c..4fa3e08f1e491d4e281412f15b49606c3548cf1c 100644
--- a/frontend-js/src/test/js/helper.js
+++ b/frontend-js/src/test/js/helper.js
@@ -26,6 +26,7 @@ var User = require("../../main/js/map/data/User");
 
 var Cookies = require('js-cookie');
 var fs = require('fs');
+var Promise = require('bluebird');
 
 var GuiConnector = require('../../main/js/GuiConnector');
 
diff --git a/frontend-js/src/test/js/map/data/UserPreferences-test.js b/frontend-js/src/test/js/map/data/UserPreferences-test.js
index 2f9c8e86e455206c03fe93135dbd7ce5cfea3fdd..6a940f7717ada5fb8f4ea83d0edc83b4e4de430b 100644
--- a/frontend-js/src/test/js/map/data/UserPreferences-test.js
+++ b/frontend-js/src/test/js/map/data/UserPreferences-test.js
@@ -1,6 +1,6 @@
 "use strict";
 
-require("../../mocha-config")
+require("../../mocha-config");
 /* exported logger */
 
 var UserPreferences = require('../../../../main/js/map/data/UserPreferences');
@@ -10,9 +10,6 @@ var logger = require('../../logger');
 var chai = require('chai');
 var assert = chai.assert;
 
-var fs = require('fs');
-var Promise = require('fs');
-
 describe('UserPreferences', function () {
   it("constructor", function () {
     return helper.readFile("testFiles/preferences.json").then(function (content) {
@@ -25,6 +22,6 @@ describe('UserPreferences', function () {
       assert.ok(object.getElementValidAnnotations("lcsb.mapviewer.model.map.species.Protein").length > 0);
       assert.ok(object.getElementRequiredAnnotations("lcsb.mapviewer.model.map.species.Protein").requiredAtLeastOnce);
       assert.ok(object.getElementRequiredAnnotations("lcsb.mapviewer.model.map.species.Protein").list.length > 0);
-    })
+    });
   });
 });
diff --git a/frontend-js/src/test/js/minerva-test.js b/frontend-js/src/test/js/minerva-test.js
index 088b40668b9c6bdc7fe143b771df86f087a8c660..b80acc556ca188d5862bb04baafab05ba8b1a196 100644
--- a/frontend-js/src/test/js/minerva-test.js
+++ b/frontend-js/src/test/js/minerva-test.js
@@ -4,8 +4,6 @@ require("./mocha-config");
 
 var Alias = require('../../main/js/map/data/Alias');
 var minerva = require('../../main/js/minerva');
-var GuiConnectorMock = require('./GuiConnector-mock');
-var ServerConnectorMock = require('./ServerConnector-mock');
 var ServerConnectorMock = require('./ServerConnector-mock');
 
 var chai = require('chai');