diff --git a/views/ngXosViews/diagnostic/spec/logicTopologyHelper.test.js b/views/ngXosViews/diagnostic/spec/logicTopologyHelper.test.js
index d9a987d..94307f5 100644
--- a/views/ngXosViews/diagnostic/spec/logicTopologyHelper.test.js
+++ b/views/ngXosViews/diagnostic/spec/logicTopologyHelper.test.js
@@ -3,14 +3,29 @@
 
   describe('The Logic Topology Helper Service', () => {
     
-    var Service;
+    var Service, Config;
+
+    var x0, x1, x2, x3, x4;
+
+    var svgWidth = 900;
 
     beforeEach(module('xos.serviceTopology'));
 
     // inject the rackHelper service
-    beforeEach(inject(function (_LogicTopologyHelper_) {
+    beforeEach(inject(function (_LogicTopologyHelper_, _serviceTopologyConfig_) {
       // The injector unwraps the underscores (_) from around the parameter names when matching
       Service = _LogicTopologyHelper_;
+      Config = _serviceTopologyConfig_;
+
+      // result
+      let totalElWidth = Config.elWidths.reduce((el, val) => val + el, 0);
+      let remainingSpace = svgWidth - totalElWidth - (Config.widthMargin * 2);
+      let step = remainingSpace / (Config.elWidths.length - 1);
+      x0 = Config.widthMargin;
+      x1 = x0 + Config.elWidths[0] + step;
+      x2 = x1 + Config.elWidths[1] + step;
+      x3 = x2 + Config.elWidths[2] + step;
+      x4 = x3 + Config.elWidths[3] + step;
     }));
 
     var customMatchers = {
@@ -34,14 +49,13 @@
     });
 
     it('should calculate horizontal position for each element', () => {
-      let [el0x, el1x, el2x, el3x, el4x, el5x] = Service.computeElementPosition(900);
-
-      expect(el0x).toBeSimilar(870);
-      expect(el1x).toBeSimilar(736.6);
-      expect(el2x).toBeSimilar(560.7);
-      expect(el3x).toBeSimilar(384.8);
-      expect(el4x).toBeSimilar(251.4);
-      expect(el5x).toBeSimilar(95);
+      let [el0x, el1x, el2x, el3x, el4x] = Service.computeElementPosition(svgWidth);
+      console.log(x1, el1x);
+      expect(el0x).toBeSimilar(svgWidth - (x0 + (Config.elWidths[0] / 2)));
+      expect(el1x).toBeSimilar(svgWidth - (x1 + (Config.elWidths[1] / 2)));
+      expect(el2x).toBeSimilar(svgWidth - (x2 + (Config.elWidths[2] / 2)));
+      expect(el3x).toBeSimilar(svgWidth - (x3 + (Config.elWidths[3] / 2)));
+      expect(el4x).toBeSimilar(svgWidth - (x4 + (Config.elWidths[4] / 2)));
     });
   });