diff --git a/test/collections.js b/test/collections.js
index e1dc5ebfc..91027f217 100644
--- a/test/collections.js
+++ b/test/collections.js
@@ -132,12 +132,15 @@ $(document).ready(function() {
   });
 
   test('collections: any', function() {
+    var nativeSome = Array.prototype.some;
+    Array.prototype.some = null;
     ok(!_.any([]), 'the empty set');
     ok(!_.any([false, false, false]), 'all false values');
     ok(_.any([false, false, true]), 'one true value');
     ok(!_.any([1, 11, 29], function(num){ return num % 2 == 0; }), 'all odd numbers');
     ok(_.any([1, 10, 29], function(num){ return num % 2 == 0; }), 'an even number');
     ok(_.some([false, false, true]), 'aliased as "some"');
+    Array.prototype.some = nativeSome;
   });
 
   test('collections: include', function() {
diff --git a/underscore.js b/underscore.js
index d007edf57..5c707e99f 100644
--- a/underscore.js
+++ b/underscore.js
@@ -186,10 +186,10 @@
     if (obj == null) return result;
     if (nativeSome && obj.some === nativeSome) return obj.some(iterator, context);
     each(obj, function (value, index, list) {
-        if (result |= iterator.call(context, value, index, list)) return breaker;
+      if (result |= iterator.call(context, value, index, list)) return breaker;
     });
     return !!result;
-  }
+  };
 
   // Determine if a given value is included in the array or object using `===`.
   // Aliased as `contains`.