Comment 2 for bug 1866597

so far, it looks pm_test just stop in [1]
"
class CountdownDialog(Gtk.Dialog):
....
        super(CountdownDialog, self).__init__(title=title,
                                              buttons=buttons)
"

This issue not happens to com.canonical.certification::sru, because it's not using pm_test.

[1] https://git.launchpad.net/plainbox-provider-checkbox/tree/bin/pm_test#n477