diff --git a/index.js b/index.js
index 054e634..e789d4a 100644
--- a/index.js
+++ b/index.js
@@ -70,6 +70,7 @@ async function downloadGofmt(octokit, version, versionPrefix, org, repo, token)
 }
 
 async function main() {
+    console.log("::warning title=Please switch to GoTestTools/gotestfmt-action::You are using the deprecated haveyoudebuggedit/gotestfmt-action. Please switch to GoTestTools/gotestfmt-action.")
     try {
         // versionPrefix is the prefix of the version gotestfmt-action supports.
         const versionPrefix = "v2."