diff --git a/lib/TestCase/AuthSource/Negotiate.php b/lib/TestCase/AuthSource/Negotiate.php
index 6be17ff5..9a9ee2c2 100644
--- a/lib/TestCase/AuthSource/Negotiate.php
+++ b/lib/TestCase/AuthSource/Negotiate.php
@@ -9,7 +9,7 @@ final class sspmod_monitor_TestCase_AuthSource_Negotiate extends sspmod_monitor_
 
     protected function initialize()
     {
-        $this->keytab = $authsource_data['keytab'];
+        $this->keytab = $this->getInput('keytab');
         $this->xml = isSet($_REQUEST['xml']);
     }