diff --git a/tests/index.html b/tests/index.html
index 5840de3..ab8272c 100644
--- a/tests/index.html
+++ b/tests/index.html
@@ -21,9 +21,6 @@
 <link rel="stylesheet" href="../node_modules/mocha/mocha.css">
 <script src="../node_modules/chai/chai.js"></script>
 <script src="../node_modules/mocha/mocha.js"></script>
-<script>
-var forceCollectObservers = true;
-</script>
 <script src="../../observe-js/src/observe.js"></script>
 <script src="../src/NodeBind.js"></script>
 </head>