diff --git a/test/unit/dom-repeat.html b/test/unit/dom-repeat.html
index 2abba7dc40..b8e143a88c 100644
--- a/test/unit/dom-repeat.html
+++ b/test/unit/dom-repeat.html
@@ -3896,7 +3896,7 @@ <h4>x-repeat-chunked</h4>
     suite('hybrid dom-repeat', function() {
 
       test('parent is parent of <dom-repeat>', function() {
-        var stamped = Array.from(document.querySelectorAll('[hybrid-stamped]'));
+        var stamped = [].slice.call(document.querySelectorAll('[hybrid-stamped]'));
         assert.equal(stamped.length, 3);
         stamped.forEach(function(el, i) {
           assert.equal(el.parentNode, document.body);
@@ -3910,12 +3910,12 @@ <h4>x-repeat-chunked</h4>
         Polymer.dom(document.body).removeChild(wrapper);
         CustomElements.takeRecords();
         domRepeat.render();
-        var stamped = Array.from(document.querySelectorAll('[hybrid-stamped]'));
+        var stamped = [].slice.call(document.querySelectorAll('[hybrid-stamped]'));
         assert.equal(stamped.length, 0);
         Polymer.dom(document.body).appendChild(wrapper);
         CustomElements.takeRecords();
         domRepeat.render();
-        stamped = Array.from(document.querySelectorAll('[hybrid-stamped]'));
+        stamped = [].slice.call(document.querySelectorAll('[hybrid-stamped]'));
         assert.equal(stamped.length, 3);
         stamped.forEach(function(el, i) {
           assert.equal(el.parentNode, document.body);
@@ -3926,7 +3926,7 @@ <h4>x-repeat-chunked</h4>
       test('insertion works correctly', function() {
         hybridDomRepeat.splice('items', 1, 0, {prop: 'new'});
         hybridDomRepeat.render();
-        var stamped = Array.from(document.querySelectorAll('[hybrid-stamped]'));
+        var stamped = [].slice.call(document.querySelectorAll('[hybrid-stamped]'));
         assert.equal(stamped.length, 4);
         stamped.forEach(function(el, i) {
           assert.equal(el.parentNode, document.body);
@@ -3937,7 +3937,7 @@ <h4>x-repeat-chunked</h4>
       test('children removed correctly', function() {
         hybridDomRepeat.items = null;
         hybridDomRepeat.render();
-        var stamped = Array.from(document.querySelectorAll('[hybrid-stamped]'));
+        var stamped = [].slice.call(document.querySelectorAll('[hybrid-stamped]'));
         assert.equal(stamped.length, 0);
       });