tests fixed

tests/test_app/src/Controller/AppController.php

@@ -5,4 +5,12 @@ namespace TestApp\Controller;
 use Cake\Controller\Controller;
 
 class AppController extends Controller {
+    /**
+     * @return void
+     */
+    public function initialize(): void {
+        parent::initialize();
+
+        $this->loadComponent('Flash');
+    }
 }