diff --git a/frontend-js/src/test/js/google-map-mock.js b/frontend-js/src/test/js/google-map-mock.js
index 82a07a1d2c995d455b0eeaa5db90bb80e00cd332..952df9cbc6272099544cd0240e6a10c2ffceddeb 100644
--- a/frontend-js/src/test/js/google-map-mock.js
+++ b/frontend-js/src/test/js/google-map-mock.js
@@ -81,28 +81,28 @@ var google = {
           return data.ne;
         },
         isEmpty : function() {
-          return ne === sw || (data.ne.lat() === sw.lat() && data.ne.lng() === sw.lng());
+          return data.ne === data.sw || (data.ne.lat() === data.sw.lat() && data.ne.lng() === data.sw.lng());
         },
         extend : function(arg) {
           if (data.sw === undefined) {
-            data.sw = arg;
+            data.sw = new google.maps.LatLng(arg.lat(), arg.lng());
           } else {
             if (arg.lng() < data.sw.lng()) {
               data.sw.longitude = arg.lng();
             }
             if (arg.lat() < data.sw.lat()) {
-              data.sw.longitude = arg.lng();
+              data.sw.latitude = arg.lat();
             }
           }
           if (data.ne === undefined) {
-            data.ne = arg;
+            data.ne = new google.maps.LatLng(arg.lat(), arg.lng());
           } else {
             if (arg.lng() > data.ne.lng()) {
               data.ne.longitude = arg.lng();
             }
 
             if (arg.lat() > data.ne.lat()) {
-              data.ne.longitude = arg.lng();
+              data.ne.latitude = arg.lat();
             }
           }
         },