diff --git a/src/globals/test-extensions.php b/src/globals/test-extensions.php
index 1b8fc074..84be5c5c 100644
--- a/src/globals/test-extensions.php
+++ b/src/globals/test-extensions.php
@@ -13,7 +13,7 @@ declare(strict_types=1);
 
 // test php version (8.1 ~ 8.4 available, multiple for matrix)
 $test_php_version = [
-    //'8.1',
+    // '8.1',
     '8.2',
     '8.3',
     '8.4',