diff --git a/src/TestSessionEnvironment.php b/src/TestSessionEnvironment.php
index ae7af83..69ddc8a 100644
--- a/src/TestSessionEnvironment.php
+++ b/src/TestSessionEnvironment.php
@@ -11,6 +11,7 @@ use SilverStripe\Control\Director;
 use SilverStripe\Control\Email\Email;
 use SilverStripe\Control\Email\Mailer;
 use SilverStripe\Control\HTTPRequest;
+use SilverStripe\Core\Config\Config;
 use SilverStripe\Core\Config\Configurable;
 use SilverStripe\Core\Environment;
 use SilverStripe\Core\Extensible;