diff --git a/test/demo/basic.html b/test/demo/basic.html
index b0e902f6..af6ae3af 100644
--- a/test/demo/basic.html
+++ b/test/demo/basic.html
@@ -19,9 +19,10 @@
     <script type="text/javascript">
 
         var viewer = OpenSeadragon({
-            id:"contentDiv",
-            prefixUrl:"../../build/openseadragon/images/",
-            tileSources:   '/test/data/testpattern.dzi'
+            // debugMode: true,
+            id: "contentDiv",
+            prefixUrl: "../../build/openseadragon/images/",
+            tileSources: "/test/data/testpattern.dzi"
         });
 
     </script>