commit 38d4cf503987b71a57b8b8cf2ba2b35aab6d6b7d
Author: Paris Liakos <rootatwc@gmail.com>
Date:   Wed Feb 11 09:06:56 2015 +0200

    Fix last failing tests

diff --git a/core/lib/Drupal/Core/Test/TestKernel.php b/core/lib/Drupal/Core/Test/TestKernel.php
index bff37e6..0de57f6 100644
--- a/core/lib/Drupal/Core/Test/TestKernel.php
+++ b/core/lib/Drupal/Core/Test/TestKernel.php
@@ -20,7 +20,7 @@ class TestKernel extends DrupalKernel {
    */
   public static function createFromRequest(Request $request, $class_loader, $environment, $allow_dumping = TRUE) {
     // Include our bootstrap file.
-    require_once __DIR__ . '/../../../../includes/bootstrap.inc';
+    require_once __DIR__ . '/../../../../includes/bootstrap.inc.php';
 
     // Exit if we should be in a test environment but aren't.
     if (!drupal_valid_test_ua()) {