--- a/gdcwebapp.xml	Tue May 30 12:26:38 2017 -0400
+++ b/gdcwebapp.xml	Tue May 30 15:56:27 2017 -0400
@@ -19,7 +19,7 @@
         <param name="URL" type="hidden" value="" />
     </inputs>
     <outputs>
-        <data name="output1" format="auto" label="${tool.name} Output Data" />
+        <data name="output1" format="auto" label="${tool.name} Output Data" hidden="True" />
         <collection name="list_output" type="list:list" label="${tool.name} Output Collection">
             <discover_datasets pattern="(?P&lt;identifier_0&gt;[^_]+)_(?P&lt;identifier_1&gt;[^_]+)" ext="auto" visible="False" directory="tmp" />
         </collection>