diff --git a/doc/sandbox.mdwn b/doc/sandbox.mdwn
index 451d77e96..748fdbe73 100644
--- a/doc/sandbox.mdwn
+++ b/doc/sandbox.mdwn
@@ -119,5 +119,5 @@ Räksmörgås.
 
 `pre?`
 
-Testing. Test. 
+Testing. Test. 試験として書き込みします。