diff --git a/tests/rtree.cm b/tests/rtree.cm
index bfe263f..0827b98 100644
--- a/tests/rtree.cm
+++ b/tests/rtree.cm
@@ -69,7 +69,7 @@ return {
         var items = []
         for(var i=0; i<10; i++) {
             var item = {x: i*10, y: 0, w: 5, h: 5, idx: i}
-            items.push(item)
+            push(items, item)
             tree.add(item)
         }