diff --git a/test/basic.html b/test/basic.html
index e9dbfc0..30768b5 100644
--- a/test/basic.html
+++ b/test/basic.html
@@ -167,19 +167,22 @@
         });
 
         test('`selectIndex()` selects an item with the given index', function() {
-          assert.equal(s2.selectedItem, s2.items[2]);
+          Polymer.Base.async(function() {
+            assert.equal(s2.selected, 'item2');
+            assert.equal(s2.selectedItem, s2.items[2]);
 
-          s2.selectIndex(1);
-          assert.equal(s2.selected, 'item1');
-          assert.equal(s2.selectedItem, s2.items[1]);
+            s2.selectIndex(1);
+            assert.equal(s2.selected, 'item1');
+            assert.equal(s2.selectedItem, s2.items[1]);
 
-          s2.selectIndex(3);
-          assert.equal(s2.selected, 'item3');
-          assert.equal(s2.selectedItem, s2.items[3]);
+            s2.selectIndex(3);
+            assert.equal(s2.selected, 'item3');
+            assert.equal(s2.selectedItem, s2.items[3]);
 
-          s2.selectIndex(4);
-          assert.equal(s2.selected, 'item4');
-          assert.equal(s2.selectedItem, s2.items[4]);
+            s2.selectIndex(4);
+            assert.equal(s2.selected, 'item4');
+            assert.equal(s2.selectedItem, s2.items[4]);
+          }, 1);
         });
       });