diff --git a/frontend-js/src/test/js/ServerConnector-test.js b/frontend-js/src/test/js/ServerConnector-test.js
index 754d45cfdcef8efcb6937c016ecb2edd9d1020c5..7b844e1e805d8a2e16a1a9bfec32bd3f9b3afd07 100644
--- a/frontend-js/src/test/js/ServerConnector-test.js
+++ b/frontend-js/src/test/js/ServerConnector-test.js
@@ -153,7 +153,7 @@ describe('ServerConnector', function () {
     var modelId = 15781;
     return ServerConnector.getImageDownloadUrl({
       modelId: modelId,
-      handlerClass: "lcsb.mapviewer.converter.graphics.PngImageGenerator",
+      handlerClass: "lcsb.mapviewer.converter.graphics.PngImageGenerator"
     }).then(function (url) {
       assert.ok(url);
       assert.ok(url.indexOf(modelId) >= 0);
@@ -165,7 +165,7 @@ describe('ServerConnector', function () {
     var modelId = 15781;
     return ServerConnector.getModelDownloadUrl({
       modelId: modelId,
-      handlerClass: "lcsb.mapviewer.converter.model.celldesigner.CellDesignerXmlParser",
+      handlerClass: "lcsb.mapviewer.converter.model.celldesigner.CellDesignerXmlParser"
     }).then(function (url) {
       assert.ok(url);
       assert.ok(url.indexOf(modelId) >= 0);
@@ -195,13 +195,13 @@ describe('ServerConnector', function () {
 
   it('removeOverlay', function () {
     return ServerConnector.removeOverlay({
-      overlayId: 17296,
+      overlayId: 17296
     });
   });
 
   it('removeComment', function () {
     return ServerConnector.removeComment({
-      commentId: 4290,
+      commentId: 4290
     });
   });
 
@@ -230,7 +230,7 @@ describe('ServerConnector', function () {
 
   it('getModelDownloadUrl', function () {
     return ServerConnector.getModelDownloadUrl({
-      backgroundOverlayId: "cv14081",
+      backgroundOverlayId: "cv14081"
     }).then(function (url) {
       assert.ok(url);
     });
@@ -305,16 +305,16 @@ describe('ServerConnector', function () {
 
   describe('returnUserOrSystemColor ', function () {
     it('user has empty color', function () {
-      var systemColor = {};
+      var systemColor = "0000FF";
       return ServerConnector.returnUserOrSystemColor("", Promise.resolve(systemColor)).then(function (result) {
-        assert.ok(result = systemColor);
+        assert.ok(255, result);
       });
     });
     it('user has defined color', function () {
-      var userColor = {};
-      var systemColor = {};
+      var userColor = "000001";
+      var systemColor = "000010";
       return ServerConnector.returnUserOrSystemColor(userColor, Promise.resolve(systemColor)).then(function (result) {
-        assert.ok(result = userColor);
+        assert.ok(1, result);
       });
     });
   });