diff --git a/tests/Bootstrap.php b/tests/Bootstrap.php
index 62c7d0d..9f89d1b 100644
--- a/tests/Bootstrap.php
+++ b/tests/Bootstrap.php
@@ -13,6 +13,7 @@
 define('VIEWPATH',		PROJECT_BASE.'');
 
 // Prep our test environment
+require_once 'vfsStream/vfsStream.php';
 include_once $dir.'/mocks/core/common.php';
 include_once $dir.'/mocks/autoloader.php';
 spl_autoload_register('autoload');