diff --git a/CHANGELOG.md b/CHANGELOG.md
index e92b140..2f443c6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,9 @@
 Most recent version is listed first.  
 
 
+## v0.0.12
+- add a tag-line of the tool(`ote`) that identified the test dependencies: https://github.com/komuw/ote/pull/40
+
 ## v0.0.11
 - Bugfix;direct dependencies in a require block with indirect deps should be well formatted: https://github.com/komuw/ote/pull/58
 
diff --git a/modfile.go b/modfile.go
index 8b75829..401b0f0 100644
--- a/modfile.go
+++ b/modfile.go
@@ -149,7 +149,9 @@ func addTestRequireBlock(f *modfile.File, lineMods []lineMod) error {
 		}
 	}
 
-	testLines := []*modfile.Line{}
+	testLines := []*modfile.Line{
+		{Token: []string{"// created using: https://github.com/komuw/ote \n"}},
+	}
 	for _, y := range lineMods {
 		testLines = append(testLines, &modfile.Line{
 			Token:    []string{y.name, y.ver},