diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index 7b2e6b8..a5a0da2 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -12,6 +12,11 @@ if (!headers_sent()) {
     ini_set('session.gc_maxlifetime', 1440); // 24 minutes
 }
 
+// Define APP_PATH for components that expect the constant
+if (!defined('APP_PATH')) {
+    define('APP_PATH', dirname(__DIR__) . '/app/');
+}
+
 // load the main App registry and plugin route registry
 require_once __DIR__ . '/../app/core/App.php';
 require_once __DIR__ . '/../app/core/PluginRouteRegistry.php';