Window decorations always cause trouble between ci
and local test runs, so turn them off for the
background-color-transparent reftest.
<?xml version="1.0" encoding="UTF-8"?>
<interface>
<object class="GtkWindow" id="window1">
+ <property name="decorated">0</property>
<child>
<object class="GtkGrid" id="grid1">
<child>
<?xml version="1.0" encoding="UTF-8"?>
<interface>
<object class="GtkWindow" id="window1">
+ <property name="decorated">0</property>
<child>
<object class="GtkGrid" id="grid1">
<child>