diff --git a/tests/PHPUnit/IntegrationTestCase.php b/tests/PHPUnit/IntegrationTestCase.php
index 1d88c5e5a3b2bf1b20c3f7040dfad4541c4defba..89cafe1dddac1ee1b2c8b5f130f4a5d614f27457 100755
--- a/tests/PHPUnit/IntegrationTestCase.php
+++ b/tests/PHPUnit/IntegrationTestCase.php
@@ -223,6 +223,7 @@ abstract class IntegrationTestCase extends PHPUnit_Framework_TestCase
         // Make sure the browser running the test does not influence the Country detection code
         $_SERVER['HTTP_ACCEPT_LANGUAGE'] = 'en';
 
+        Piwik_Tracker_Cache::deleteTrackerCache();
         $this->changeLanguage('en');
     }