diff --git a/doc/doc-test.txt b/doc/doc-test.txt
index d2b26f0..bd54b4d 100644
--- a/doc/doc-test.txt
+++ b/doc/doc-test.txt
@@ -1,2 +1,3 @@
 this is a testing file in doc folder.
+this is another branch.
 this is in main branch.