diff --git a/examples/donut.js b/examples/donut.js
index 88336ececd..01ae57d2cb 100644
--- a/examples/donut.js
+++ b/examples/donut.js
@@ -1,8 +1,14 @@
+// allow testing of specific renderers via "?renderer=Canvas", etc
+var renderer = OpenLayers.Util.getParameters(window.location.href).renderer;
+renderer = (renderer) ? [renderer] : OpenLayers.Layer.Vector.prototype.renderers;
+
 var map = new OpenLayers.Map({
     div: "map",
     layers: [
         new OpenLayers.Layer.OSM(),
-        new OpenLayers.Layer.Vector()
+        new OpenLayers.Layer.Vector("Vector Layer", {
+            renderers: renderer
+        })
     ],
     center: new OpenLayers.LonLat(0, 0),
     zoom: 1
@@ -35,4 +41,4 @@ function toggleControl(element) {
         draw.deactivate();
     }
 }
-document.getElementById("noneToggle").checked = true;
\ No newline at end of file
+document.getElementById("noneToggle").checked = true;