diff --git a/test/test.js b/test/test.js
index a6bbfdc..633b527 100644
--- a/test/test.js
+++ b/test/test.js
@@ -417,7 +417,7 @@ describe('xterm.js', function() {
 
     describe('On MS Windows', function() {
       beforeEach(function() {
-        xterm.isMSWindows = true;
+        xterm.browser.isMSWindows = true;
       });
 
       it('should not interfere with the alt + ctrl key on keyDown', function() {