diff --git a/tests/PHPUnit/TestingEnvironment.php b/tests/PHPUnit/TestingEnvironment.php
index 363c8a89b96b28f94fc5a05a43937a7e0c0cf613..5487de9625150ec02651d20da44dafa32b0438fd 100644
--- a/tests/PHPUnit/TestingEnvironment.php
+++ b/tests/PHPUnit/TestingEnvironment.php
@@ -69,6 +69,8 @@ class Piwik_TestingEnvironment
 
     public function save()
     {
+        @mkdir(PIWIK_INCLUDE_PATH . '/tmp');
+
         $overridePath = PIWIK_INCLUDE_PATH . '/tmp/testingPathOverride.json';
         file_put_contents($overridePath, json_encode($this->behaviorOverrideProperties));
     }