diff --git a/src/renderers/dom/ReactDOMStringRenderer.js b/src/renderers/dom/ReactDOMStringRenderer.js
index b682b39ffa..7995ac3581 100644
--- a/src/renderers/dom/ReactDOMStringRenderer.js
+++ b/src/renderers/dom/ReactDOMStringRenderer.js
@@ -13,7 +13,6 @@
 
 var invariant = require('fbjs/lib/invariant');
 var React = require('react');
-var ReactMarkupChecksum = require('ReactMarkupChecksum');
 var ReactPartialRenderer = require('ReactPartialRenderer');
 
 /**
@@ -28,7 +27,6 @@ function renderToString(element) {
   );
   var renderer = new ReactPartialRenderer(element, false);
   var markup = renderer.read(Infinity);
-  markup = ReactMarkupChecksum.addChecksumToMarkup(markup);
   return markup;
 }
 
diff --git a/src/renderers/dom/shared/__tests__/ReactServerRendering-test.js b/src/renderers/dom/shared/__tests__/ReactServerRendering-test.js
index 53d81dac08..b768f3bef2 100644
--- a/src/renderers/dom/shared/__tests__/ReactServerRendering-test.js
+++ b/src/renderers/dom/shared/__tests__/ReactServerRendering-test.js
@@ -53,9 +53,11 @@ describe('ReactDOMServer', () => {
             ROOT_ATTRIBUTE_NAME +
             '="" ' +
             ID_ATTRIBUTE_NAME +
-            '="[^"]*" ' +
-            ReactMarkupChecksum.CHECKSUM_ATTR_NAME +
-            '="[^"]+">hello world</span>',
+            '="[^"]*"' +
+            (ReactDOMFeatureFlags.useFiber
+              ? ''
+              : ' ' + ReactMarkupChecksum.CHECKSUM_ATTR_NAME + '="[^"]+"') +
+            '>hello world</span>',
         ),
       );
     });
@@ -68,9 +70,11 @@ describe('ReactDOMServer', () => {
             ROOT_ATTRIBUTE_NAME +
             '="" ' +
             ID_ATTRIBUTE_NAME +
-            '="[^"]*" ' +
-            ReactMarkupChecksum.CHECKSUM_ATTR_NAME +
-            '="[^"]+"/>',
+            '="[^"]*"' +
+            (ReactDOMFeatureFlags.useFiber
+              ? ''
+              : ' ' + ReactMarkupChecksum.CHECKSUM_ATTR_NAME + '="[^"]+"') +
+            '/>',
         ),
       );
     });
@@ -83,9 +87,11 @@ describe('ReactDOMServer', () => {
             ROOT_ATTRIBUTE_NAME +
             '="" ' +
             ID_ATTRIBUTE_NAME +
-            '="[^"]*" ' +
-            ReactMarkupChecksum.CHECKSUM_ATTR_NAME +
-            '="[^"]+"/>',
+            '="[^"]*"' +
+            (ReactDOMFeatureFlags.useFiber
+              ? ''
+              : ' ' + ReactMarkupChecksum.CHECKSUM_ATTR_NAME + '="[^"]+"') +
+            '/>',
         ),
       );
     });
@@ -127,9 +133,11 @@ describe('ReactDOMServer', () => {
             ROOT_ATTRIBUTE_NAME +
             '="" ' +
             ID_ATTRIBUTE_NAME +
-            '="[^"]*" ' +
-            ReactMarkupChecksum.CHECKSUM_ATTR_NAME +
-            '="[^"]+">' +
+            '="[^"]*"' +
+            (ReactDOMFeatureFlags.useFiber
+              ? ''
+              : ' ' + ReactMarkupChecksum.CHECKSUM_ATTR_NAME + '="[^"]+"') +
+            '>' +
             '<span ' +
             ID_ATTRIBUTE_NAME +
             '="[^"]*">' +
@@ -196,9 +204,11 @@ describe('ReactDOMServer', () => {
               ROOT_ATTRIBUTE_NAME +
               '="" ' +
               ID_ATTRIBUTE_NAME +
-              '="[^"]*" ' +
-              ReactMarkupChecksum.CHECKSUM_ATTR_NAME +
-              '="[^"]+">' +
+              '="[^"]*"' +
+              (ReactDOMFeatureFlags.useFiber
+                ? ''
+                : ' ' + ReactMarkupChecksum.CHECKSUM_ATTR_NAME + '="[^"]+"') +
+              '>' +
               (ReactDOMFeatureFlags.useFiber
                 ? 'Component name: <!-- -->TestComponent'
                 : '<!-- react-text: [0-9]+ -->Component name: <!-- /react-text -->' +