diff --git a/test.bash b/test.bash
index 7056c2c..b257068 100755
--- a/test.bash
+++ b/test.bash
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/bash -xv
 # SPDX-FileCopyrightText: 2024 Junya Wada
 # SPDX-License-Identifier: GPL-3.0-only