diff --git a/config/global.php b/config/global.php
index 33d8dc33c51a002efc2751bd7ed16135494e4938..b8daf48d7fdddfb25c666a515abb9005b9df30c8 100644
--- a/config/global.php
+++ b/config/global.php
@@ -34,7 +34,7 @@ return array(
         if (defined('PIWIK_TEST_MODE') && PIWIK_TEST_MODE) { // todo replace this with isTest() instead of isCli()
             $backend = 'file';
         } elseif (\Piwik\Development::isEnabled()) {
-            $backend = 'null';
+            $backend = 'array';
         } else {
             $backend = $c->get('ini.Cache.backend');
         }