diff --git a/testuml.pu b/testuml.pu
index 362b17f..e53b520 100644
--- a/testuml.pu
+++ b/testuml.pu
@@ -1,5 +1,5 @@
 @startuml
-Alice -> Bob: Authentication Request
+Alice -> Bob: Authentication Request 日本語テスト
 Bob --> Alice: Authentication Response
 
 Alice -> Bob: Another authentication Request