diff --git a/demos/widget-factory/widget-factory.ui b/demos/widget-factory/widget-factory.ui
index 1ef5a049ca..d453dbce15 100644
--- a/demos/widget-factory/widget-factory.ui
+++ b/demos/widget-factory/widget-factory.ui
@@ -3721,6 +3721,7 @@ microphone-sensitivity-medium-symbolic</property>
                             <child>
                               <object class="GtkNotebook">
                                 <property name="visible">True</property>
+                                <property name="show-border">False</property>
                                 <child>
                                   <object class="GtkBox">
                                     <property name="visible">True</property>
@@ -3750,6 +3751,7 @@ microphone-sensitivity-medium-symbolic</property>
                             <child>
                               <object class="GtkNotebook">
                                 <property name="visible">True</property>
+                                <property name="show-border">False</property>
                                 <child>
                                   <object class="GtkBox">
                                     <property name="visible">True</property>