diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 8cca631..f4fbfc3 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -9,4 +9,6 @@ jobs:
     steps:
     - uses: actions/checkout@v3
     - name: All test
-      run: bash -xv ./test.bash
+      run: |
+        bash -xv ./test.bash
+        bash -xv ./morse_test.bash
diff --git a/morse b/morse
index 488728a..371cbb5 100755
--- a/morse
+++ b/morse
@@ -1,4 +1,5 @@
 #!/usr/bin/python3
+
 # SPDX-FileCopyrightText: 2024 Junya Wada
 # SPDX-License-Identifier: GPL-3.0-only
 
diff --git a/morse_test.bash b/morse_test.bash
new file mode 100755
index 0000000..a257c06
--- /dev/null
+++ b/morse_test.bash
@@ -0,0 +1,18 @@
+#!/bin/bash -xv
+# SPDX-FileCopyrightText: 2024 Junya Wada
+# SPDX-License-Identifier: GPL-3.0-only
+
+ng(){
+	echo ${1}行目が違う
+	res=1
+}
+
+res = 0
+
+out=$(echo "a" | ./morse)
+[ "${out}" = "・ー" ] || ng "$LINENO"
+
+
+[ "$res" = 0 ] && echo OK
+
+exit $res