diff --git a/tests/_bootstrap.php b/tests/_bootstrap.php
index 80f769f52..725400db8 100644
--- a/tests/_bootstrap.php
+++ b/tests/_bootstrap.php
@@ -39,6 +39,7 @@ $grav = Grav::instance(
 );
 
 $grav['debugger']->init();
+$grav['assets']->init();
 
 // Set default $_SERVER value used for nonces
 empty( $_SERVER['HTTP_CLIENT_IP'] ) && $_SERVER['HTTP_CLIENT_IP'] = '127.0.0.1';