diff --git a/src/renderers/dom/client/ReactMount.js b/src/renderers/dom/client/ReactMount.js
index f2f9f262b4..4345563f20 100644
--- a/src/renderers/dom/client/ReactMount.js
+++ b/src/renderers/dom/client/ReactMount.js
@@ -884,15 +884,16 @@ var ReactMount = {
         // will have occurred which will not be present in `markup`. Here,
         // insert markup into a <div> or <iframe> depending on the container
         // type to perform the same normalizations before comparing.
+        var normalizer, normalizedMarkup;
         if (container.nodeType === ELEMENT_NODE_TYPE) {
-          var normalizer = document.createElement('div');
+          normalizer = document.createElement('div');
           normalizer.innerHTML = markup;
-          var normalizedMarkup = normalizer.innerHTML;
+          normalizedMarkup = normalizer.innerHTML;
         } else {
-          var normalizer = document.createElement('iframe');
+          normalizer = document.createElement('iframe');
           document.body.appendChild(normalizer);
           normalizer.contentDocument.write(markup);
-          var normalizedMarkup = normalizer.contentDocument.documentElement.outerHTML;
+          normalizedMarkup = normalizer.contentDocument.documentElement.outerHTML;
         }
 
         var diffIndex = firstDifferenceIndex(normalizedMarkup, rootMarkup);
diff --git a/src/renderers/dom/client/__tests__/ReactMount-test.js b/src/renderers/dom/client/__tests__/ReactMount-test.js
index ea875eb38f..3d0c1080e7 100644
--- a/src/renderers/dom/client/__tests__/ReactMount-test.js
+++ b/src/renderers/dom/client/__tests__/ReactMount-test.js
@@ -16,7 +16,6 @@ var mocks = require('mocks');
 describe('ReactMount', function() {
   var React = require('React');
   var ReactMount = require('ReactMount');
-  var ReactMarkupChecksum = require('ReactMarkupChecksum');
   var ReactTestUtils = require('ReactTestUtils');
   var WebComponents = WebComponents;
 
@@ -170,7 +169,7 @@ describe('ReactMount', function() {
     expect(console.error.calls[0].args[0]).toContain(
       ' (client)  html entity: &amp; client text</div>\n' +
       ' (server)  html entity: &amp; server text</div>'
-    )
+    );
   });
 
   if (WebComponents !== undefined) {