def METHOD_NAME(self):
    self.orga.settings.primary_color = "#33c33c"
    self.event.settings.primary_color = "#34c34c"
    regenerate_organizer_css.apply(args=(self.orga.pk,))
    self.orga.settings.flush()
    assert self.orga.settings.presale_css_file
    with open(os.path.join(settings.MEDIA_ROOT, self.orga.settings.presale_css_file), 'r') as c:
        assert '#33c33c' in c.read()
    self.event.settings.flush()
    assert self.event.settings.presale_css_file
    with open(os.path.join(settings.MEDIA_ROOT, self.event.settings.presale_css_file), 'r') as c:
        assert '#34c34c' not in c.read()
        assert '#33c33c' not in c.read()