'Only one option can be selected (#8103).'

def test_render_selected(self):

    choices = [('0', '0'), ('1', '1'), ('2', '2'), ('3', '3'), ('0', 'extra')]
    self.check_html(self.widget(choices=choices), 'choices', '0', html='<select    name="choices">\n                                                <option    value="0"    selected>0</option>\n                                                <option    value="1">1</option>\n                                                <option    value="2">2</option>\n                                                <option    value="3">3</option>\n                                                <option    value="0">extra</option>\n                                                </select>')
