diff --git a/tests/OLLoader.js b/tests/OLLoader.js
index 9fb391034a..a2311c7e2f 100644
--- a/tests/OLLoader.js
+++ b/tests/OLLoader.js
@@ -1,25 +1,26 @@
 // Adding a mode parameter with "build" as value in the run-tests.html will 
 // make usage of the build version of the library.
 // get the OLLoader.js script location
-
-var r = new RegExp("(^|(.*?\\/))(" + "OLLoader.js" + ")(\\?|$)"),
-    s = document.getElementsByTagName('script'),
-    src, m, l = "";
-for(var i=0, len=s.length; i<len; i++) {
-    src = s[i].getAttribute('src');
-    if(src) {
-        var m = src.match(r);
-        if(m) {
-            l = m[1];
-            break;
+(function() {
+    var r = new RegExp("(^|(.*?\\/))(" + "OLLoader.js" + ")(\\?|$)"),
+        s = document.getElementsByTagName('script'),
+        src, m, l = "";
+    for(var i=0, len=s.length; i<len; i++) {
+        src = s[i].getAttribute('src');
+        if(src) {
+            var m = src.match(r);
+            if(m) {
+                l = m[1];
+                break;
+            }
         }
     }
-}
 
-var regex = new RegExp( "[\\?&]mode=([^&#]*)" );
-var href = window.parent.location.href;
-var results = regex.exec( href );
-l += (results && results[1] == 'build') ? 
-    "../build/OpenLayers.js" : "../lib/OpenLayers.js"; 
-scriptTag = "<script src='" + l + "'></script>"; 
-document.write(scriptTag);
+    var regex = new RegExp( "[\\?&]mode=([^&#]*)" );
+    var href = window.parent.location.href;
+    var results = regex.exec( href );
+    l += (results && results[1] == 'build') ? 
+        "../build/OpenLayers.js" : "../lib/OpenLayers.js"; 
+    scriptTag = "<script src='" + l + "'></script>"; 
+    document.write(scriptTag);
+})();