diff --git a/test/functions.js b/test/functions.js
index b976977e7..61ab2ce4a 100644
--- a/test/functions.js
+++ b/test/functions.js
@@ -70,13 +70,13 @@ $(document).ready(function() {
   asyncTest("functions: throttle", 1, function() {
     var counter = 0;
     var incr = function(){ counter++; };
-    var throttledIncr = _.throttle(incr, 50);
+    var throttledIncr = _.throttle(incr, 100);
     throttledIncr(); throttledIncr(); throttledIncr();
-    setTimeout(throttledIncr, 60);
-    setTimeout(throttledIncr, 70);
-    setTimeout(throttledIncr, 110);
     setTimeout(throttledIncr, 120);
-    _.delay(function(){ ok(counter == 3, "incr was throttled"); start(); }, 200);
+    setTimeout(throttledIncr, 140);
+    setTimeout(throttledIncr, 220);
+    setTimeout(throttledIncr, 240);
+    _.delay(function(){ ok(counter == 3, "incr was throttled"); start(); }, 400);
   });
 
   asyncTest("functions: debounce", 1, function() {
diff --git a/underscore.js b/underscore.js
index ca580fc2b..5a0e4468e 100644
--- a/underscore.js
+++ b/underscore.js
@@ -519,9 +519,6 @@
 
   // Perform a deep comparison to check if two objects are equal.
   _.isEqual = function(a, b) {
-    // Unwrap any wrapped objects
-    if (a && a._chain) a = a.value();
-    if (b && b._chain) b = b.value();
     // Check object identity.
     if (a === b) return true;
     // Different types?
@@ -531,6 +528,9 @@
     if (a == b) return true;
     // One is falsy and the other truthy.
     if ((!a && b) || (a && !b)) return false;
+    // Unwrap any wrapped objects
+    if (a._chain) a = a.value();
+    if (b._chain) b = b.value();
     // One of them implements an isEqual()?
     if (a.isEqual) return a.isEqual(b);
     // Check dates' integer values.