diff --git a/common/const_var.go b/common/const_var.go
index 776cda6..925b194 100644
--- a/common/const_var.go
+++ b/common/const_var.go
@@ -144,3 +144,5 @@ const (
 	RootDocumentMetaChanged
 	RootDocumentMissing
 )
+
+// dummy changes for testing