Comment 2 for bug 1052572

It's very easy to fix, line 398 of scripts/key_test has:

    GObject.timeout_add_seconds(EXIT_TIMEOUT, reporter.quit)

If this is removed, the test will NOT exit after EXIT_TIMEOUT seconds.

Then, each Reporter subclass has a few calls to self.show_text with the text shown to the user. The instructions for the text-mode test already show how to exit it manually:

        self.show_text(_("You can also close me by pressing ESC or Ctrl+C."))

The GtkReporter class doesn't:

        self.show_text(_("Please press each key on your keyboard."))
        self.show_text(_("If a key is not present in your keyboard, "
                         "press the 'Skip' button below it to remove it "
                         "from the test."))

but it's trivial to add.