diff --git a/plugins/mailhandler/retrieve/MailhandlerRetrieve.class.php b/plugins/mailhandler/retrieve/MailhandlerRetrieve.class.php
index 42a3c8a..6c99a18 100644
--- a/plugins/mailhandler/retrieve/MailhandlerRetrieve.class.php
+++ b/plugins/mailhandler/retrieve/MailhandlerRetrieve.class.php
@@ -30,7 +30,7 @@ abstract class MailhandlerRetrieve {
    * Test connection.
    */
   public function test($form_state) {
-    return;
+    return array();
   }
 
   public function purge_message($mailbox, $message) {