diff --git a/tests/test_Layer_Grid.html b/tests/test_Layer_Grid.html
index 9bfa35e520..394f817e23 100644
--- a/tests/test_Layer_Grid.html
+++ b/tests/test_Layer_Grid.html
@@ -129,7 +129,7 @@
      */
 
     function test_10_Layer_Grid_clone(t) {
-        t.plan(4);
+        t.plan(5);
         
         var options = {tileSize: new OpenLayers.Size(500,50)};
         var map = new OpenLayers.Map('map', options);
@@ -141,7 +141,8 @@
 
         var clone = layer.clone();
 
-        t.ok( clone.grid == null, "clone does not copy grid");
+        t.ok( clone.grid != layer.grid, "clone does not copy grid");
+        t.ok( clone.grid.length == 0, "clone creates a new array instead");
 
         t.ok( clone.tileSize.equals(layer.tileSize), "tileSize correctly cloned");
 
diff --git a/tests/test_Layer_KaMap.html b/tests/test_Layer_KaMap.html
index 2a8a404637..4638b17a3b 100644
--- a/tests/test_Layer_KaMap.html
+++ b/tests/test_Layer_KaMap.html
@@ -134,7 +134,7 @@
 
         var clone = layer.clone();
 
-        t.ok( clone.grid == null, "clone does not copy grid");
+        t.ok( clone.grid != layer.grid, "clone does not copy grid");
 
         t.ok( clone.tileSize.equals(layer.tileSize), "tileSize correctly cloned");
 
diff --git a/tests/test_Layer_WMS.html b/tests/test_Layer_WMS.html
index 5990022d25..434a677b13 100644
--- a/tests/test_Layer_WMS.html
+++ b/tests/test_Layer_WMS.html
@@ -77,7 +77,7 @@
 
         var clone = layer.clone();
 
-        t.ok( clone.grid == null, "clone does not copy grid");
+        t.ok( clone.grid != layer.grid, "clone does not copy grid");
 
         t.ok( clone.tileSize.equals(layer.tileSize), "tileSize correctly cloned");