Fixes global leak prop

Author: dscape

lib/test.js

@@ -52,7 +52,7 @@ function Test (name_, opts_, cb_) {
     this._progeny = [];
     this._ok = true;
 
-    for (prop in this) {
+    for (var prop in this) {
         this[prop] = (function bind(self, val) {
             if (typeof val === 'function') {
                 return function bound() {