diff --git a/src/renderers/testing/ReactTestEmptyComponent.js b/src/renderers/testing/ReactTestEmptyComponent.js
index 067d5e8e043b..37ff674c0c62 100644
--- a/src/renderers/testing/ReactTestEmptyComponent.js
+++ b/src/renderers/testing/ReactTestEmptyComponent.js
@@ -7,6 +7,7 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  *
  * @providesModule ReactTestEmptyComponent
+ * @preventMunge
  * @flow
  */
 
@@ -14,7 +15,7 @@
 
 class ReactTestEmptyComponent {
   _currentElement: null;
-  
+
   constructor() {
     this._currentElement = null;
   }
diff --git a/src/renderers/testing/ReactTestRenderer.js b/src/renderers/testing/ReactTestRenderer.js
index c053697ed5ed..47184fea0c1b 100644
--- a/src/renderers/testing/ReactTestRenderer.js
+++ b/src/renderers/testing/ReactTestRenderer.js
@@ -7,6 +7,7 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  *
  * @providesModule ReactTestRenderer
+ * @preventMunge
  * @flow
  */
 
diff --git a/src/renderers/testing/ReactTestTextComponent.js b/src/renderers/testing/ReactTestTextComponent.js
index a6e61a655dca..e87e1bd4b782 100644
--- a/src/renderers/testing/ReactTestTextComponent.js
+++ b/src/renderers/testing/ReactTestTextComponent.js
@@ -7,6 +7,7 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  *
  * @providesModule ReactTestTextComponent
+ * @preventMunge
  * @flow
  */
 
@@ -16,7 +17,7 @@ import type { ReactText } from 'ReactTypes';
 
 class ReactTestTextComponent {
   _currentElement: ReactText;
-  
+
   constructor(element: ReactText) {
     this._currentElement = element;
   }
diff --git a/src/test/ReactShallowRenderer.js b/src/test/ReactShallowRenderer.js
index e16f8476117e..81712cca6ffe 100644
--- a/src/test/ReactShallowRenderer.js
+++ b/src/test/ReactShallowRenderer.js
@@ -7,6 +7,7 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  *
  * @providesModule ReactShallowRenderer
+ * @preventMunge
  */
 
 'use strict';