diff --git a/src/Actions/ExecuteAction.php b/src/Actions/ExecuteAction.php
index 899727d..782aaf2 100644
--- a/src/Actions/ExecuteAction.php
+++ b/src/Actions/ExecuteAction.php
@@ -92,7 +92,6 @@ public function call(array $header, array $content, $zmqId = null)
 
     public function notifyMessage(string $message)
     {
-        $this->broker->send($this->iopubSocket, 'stream', ['name' => 'stdout', 'text' => $message], $this->header);
         $this->broker->send(
             $this->iopubSocket,
             'execute_result',