diff --git a/lib/OpenLayers/Tile/Image.js b/lib/OpenLayers/Tile/Image.js
index 9923109087..4db5ff8440 100644
--- a/lib/OpenLayers/Tile/Image.js
+++ b/lib/OpenLayers/Tile/Image.js
@@ -7,6 +7,7 @@
 /**
  * @requires OpenLayers/Tile.js
  * @requires OpenLayers/Animation.js
+ * @requires OpenLayers/Util.js
  */
 
 /**
@@ -317,7 +318,7 @@ OpenLayers.Tile.Image = OpenLayers.Class(OpenLayers.Tile, {
         this.layer.div.appendChild(this.getTile());
         this.events.triggerEvent(this._loadEvent);
         var img = this.getImage();
-        if (this.url && img.getAttribute("src") == this.url) {
+        if (this.url && OpenLayers.Util.isEquivalentUrl(img.src, this.url)) {
             this._loadTimeout = window.setTimeout(
                 OpenLayers.Function.bind(this.onImageLoad, this), 0
             );
diff --git a/tests/TileManager.html b/tests/TileManager.html
index 72a58b4922..1468c5b46b 100644
--- a/tests/TileManager.html
+++ b/tests/TileManager.html
@@ -64,17 +64,28 @@
             gridSize = layer.div.childNodes.length;
             map.setCenter([17, 47]);
         });
+
+        function inCache(img) {
+            var search = img.src.split('?')[1];
+            for (var s in tileManager.tileCache) {
+                if (s.split('?')[1] == search) {
+                    return true;
+                }
+            }
+            return false;
+        }
+
         t.delay_call(4, function() {
             t.eq(tileManager.tileCacheIndex.length, 12, "tiles cached");
             t.ok(tileManager.tileCache[layer.grid[1][2].url] === layer.grid[1][2].imgDiv, "correct object cached");
-            t.ok(!(firstInCache.getAttribute("src") in tileManager.tileCache), "old tile discarded");
-            t.ok(sharedTile.getAttribute("src") in tileManager.tileCache, "shared tile still in cache");
+            t.ok(!inCache(firstInCache), "old tile discarded");
+            t.ok(inCache(sharedTile), "shared tile still in cache");
             firstInCache = tileManager.tileCache[tileManager.tileCacheIndex[0]];
             map.setCenter([16, 48]);
         });
         t.delay_call(6, function() {
-            t.ok(!(firstInCache.getAttribute("src") in tileManager.tileCache), "old tile discarded");
-            t.ok(sharedTile.getAttribute("src") in tileManager.tileCache, "shared tile still in cache");
+            t.ok(!inCache(firstInCache), "old tile discarded");
+            t.ok(inCache(sharedTile), "shared tile still in cache");
             t.eq(layer.div.childNodes.length, gridSize, 'no unused images left in dom');
             map.destroy();
         });