diff --git a/tests/PHPUnit/TestingEnvironment.php b/tests/PHPUnit/TestingEnvironment.php
index 06152ff4f1d79eb96d0d544fda4854ed27ddef83..2f6f8944304cb621560af5e8498652e281d924a1 100644
--- a/tests/PHPUnit/TestingEnvironment.php
+++ b/tests/PHPUnit/TestingEnvironment.php
@@ -139,7 +139,7 @@ class Piwik_TestingEnvironment
 
                 $config->Plugins = array('Plugins' => array_merge($config->Plugins['Plugins'], $pluginsToLoad));
 
-                $trackerPluginsToLoad = array_filter($pluginsToLoad, function ($plugin) use ($manager) {
+                $trackerPluginsToLoad = array_filter($config->Plugins['Plugins'], function ($plugin) use ($manager) {
                     return $manager->isTrackerPlugin($manager->loadPlugin($plugin));
                 });