diff --git a/tests/mocks/core/security.php b/tests/mocks/core/security.php
index de8e447..c5269fb 100644
--- a/tests/mocks/core/security.php
+++ b/tests/mocks/core/security.php
@@ -4,6 +4,9 @@
 	
 	public function csrf_set_cookie()
 	{
+		// We cannot set cookie in CLI mode, so for csrf test, who rely on $_COOKIE,
+		// we superseded set_cookie with directly set the cookie variable,
+		// @see : ./Bootstrap.php, line 16
 		return $this;
 	}