diff --git a/lib/list.js b/lib/list.js
index 3e6faa1e..4c4158eb 100644
--- a/lib/list.js
+++ b/lib/list.js
@@ -13,7 +13,7 @@ function List(items, itemType, parent) {
     try {
       items = JSON.parse(items);
     } catch (e) {
-      throw new Error('could not create List from JSON string: ', items);
+      throw new Error(util.format('could not create List from JSON string: %j', items));
     }
   }
 
@@ -22,7 +22,7 @@ function List(items, itemType, parent) {
 
   items = items || [];
   if (!Array.isArray(items)) {
-    throw new Error('Items must be an array: ' + items);
+    throw new Error(util.format('Items must be an array: %j', items));
   }
 
   if(!itemType) {
@@ -92,12 +92,3 @@ List.prototype.toString = function () {
   return JSON.stringify(this.toJSON());
 };
 
-/*
- var strArray = new List(['1', 2], String);
- strArray.push(3);
- console.log(strArray);
- console.log(strArray.length);
-
- console.log(strArray.toJSON());
- console.log(strArray.toString());
- */