diff --git a/src/core/__tests__/ReactMultiChild-test.js b/src/core/__tests__/ReactMultiChild-test.js
index 6614ec5a53..f1700384d5 100644
--- a/src/core/__tests__/ReactMultiChild-test.js
+++ b/src/core/__tests__/ReactMultiChild-test.js
@@ -16,6 +16,7 @@
  * @jsx React.DOM
  * @emails react-core
  */
+"use strict";
 
 var mocks = require('mocks');
 
diff --git a/src/dom/__tests__/Danger-test.js b/src/dom/__tests__/Danger-test.js
index f82a97241e..871b91ee49 100644
--- a/src/dom/__tests__/Danger-test.js
+++ b/src/dom/__tests__/Danger-test.js
@@ -16,6 +16,7 @@
  * @jsx React.DOM
  * @emails react-core
  */
+"use strict";
 
 /*jslint evil: true */