diff --git a/tests/Doctrine/Tests/TestInit.php b/tests/Doctrine/Tests/TestInit.php
index c257a75b6..f974c9915 100644
--- a/tests/Doctrine/Tests/TestInit.php
+++ b/tests/Doctrine/Tests/TestInit.php
@@ -5,6 +5,7 @@
 namespace Doctrine\Tests;
 
 error_reporting(E_ALL | E_STRICT);
+date_default_timezone_set('UTC');
 
 if (file_exists(__DIR__ . '/../../../vendor/autoload.php')) {
     // dependencies were installed via composer - this is the main project