diff --git a/lib/test.js b/lib/test.js
index f6a0e6b2..f4013bc1 100644
--- a/lib/test.js
+++ b/lib/test.js
@@ -88,15 +88,16 @@ function Test(name_, opts_, cb_) {
 		this._objectPrintDepth = 5;
 	}
 
-	for (var prop in this) {
-		this[prop] = (function bind(self, val) {
-			if (typeof val === 'function') {
+	var self = this;
+	for (var prop in self) {
+		if (typeof self[prop] === 'function') {
+			self[prop] = (function bind(propName) {
+				var val = self[propName];
 				return function bound() {
 					return val.apply(self, arguments);
 				};
-			}
-			return val;
-		}(this, this[prop]));
+			}(prop));
+		}
 	}
 }