diff --git a/test/backbone.html b/test/backbone.html
index 462c0e50d..66b0ef7ca 100644
--- a/test/backbone.html
+++ b/test/backbone.html
@@ -30,8 +30,8 @@
 		</script>
 		<script>
 			_.mixin({
-				'debounce': lodash.debounce,
-				'defer': lodash.defer
+				'debounce': _.debounce || lodash.debounce,
+				'defer': _.defer || lodash.defer
 			});
 		</script>
 		<script src="../vendor/backbone/backbone.js"></script>
diff --git a/test/underscore.html b/test/underscore.html
index 67adf1ac6..54de9cc9b 100644
--- a/test/underscore.html
+++ b/test/underscore.html
@@ -31,7 +31,7 @@
 				    push = arrayProto.push,
 				    slice = arrayProto.slice;
 
-				if (lodash.chain && lodash.chain().__chain__) {
+				if (lodash().each().__chain__) {
 					return;
 				}
 				lodash.mixin = function(object) {
@@ -53,31 +53,6 @@
 
 				lodash.mixin(lodash);
 
-				lodash.chain = function(value) {
-					value = new lodash(value);
-					value.__chain__ = true;
-					return value;
-				};
-
-				lodash.prototype.chain = function() {
-					this.__chain__ = true;
-					return this;
-				};
-
-				lodash.prototype.concat = function() {
-					var result = concat.apply(this.__wrapped__, arguments);
-					if (this.__chain__) {
-						result = new lodash(result);
-						result.__chain__ = true;
-					}
-					return result;
-				};
-
-				lodash.prototype.pop = function() {
-					pop.apply(this.__wrapped__, arguments);
-					return this;
-				};
-
 				// expose lodash
 				window._ = lodash;
 			}