diff --git a/demos/widget-factory/widget-factory.ui b/demos/widget-factory/widget-factory.ui
index a8df03affd..2cd966c283 100644
--- a/demos/widget-factory/widget-factory.ui
+++ b/demos/widget-factory/widget-factory.ui
@@ -432,6 +432,8 @@ Suspendisse feugiat quam quis dolor accumsan cursus.</property>
         <child>
           <object class="GtkStack" id="toplevel_stack">
             <property name="visible">1</property>
+            <property name="transition-duration">1000</property>
+            <property name="transition-type">slide-left-right</property>
             <child>
               <object class="GtkBox" id="page1">
                 <property name="visible">1</property>