diff --git a/test/underscore/collections.js b/test/underscore/collections.js
index 4bf8a413d..bc9202c89 100644
--- a/test/underscore/collections.js
+++ b/test/underscore/collections.js
@@ -258,11 +258,11 @@ $(document).ready(function() {
 
   test('collections: sortedIndex', function() {
     var numbers = [10, 20, 30, 40, 50], num = 35;
-    var index = _.sortedIndex(numbers, num);
-    equal(index, 3, '35 should be inserted at index 3');
+    var indexForNum = _.sortedIndex(numbers, num);
+    equal(indexForNum, 3, '35 should be inserted at index 3');
 
-    var index2 = _.sortedIndex(numbers, 30);
-    equal(index2, 2, '30 should be inserted at index 2');
+    var indexFor30 = _.sortedIndex(numbers, 30);
+    equal(indexFor30, 2, '30 should be inserted at index 2');
   });
 
   test('collections: shuffle', function() {