diff --git a/src/Poster.php b/src/Poster.php
index be7ca93..9d695b0 100644
--- a/src/Poster.php
+++ b/src/Poster.php
@@ -17,6 +17,7 @@ final class Poster{
   }
 
   public function post($url, $user, $pass, $repoUser, $repo, $title='Test Results'){
+    if(!$url) return;
     // open connection and repo
     $this->client=new Client($url, $user, $pass);
     $this->repo=$this->client->getRepo($repoUser, $repo);