diff --git a/test/bootstrap.php b/test/bootstrap.php
index 91f654a..2399f38 100644
--- a/test/bootstrap.php
+++ b/test/bootstrap.php
@@ -9,6 +9,8 @@
  * file that was distributed with this source code.
  */
 
+date_default_timezone_set('UTC');
+
 require dirname(__FILE__).'/../src/Mustache/Autoloader.php';
 Mustache_Autoloader::register();