if not current_question.is_last:
                self.next_question(driver, current_question.question_index, errors)
            else:
                if run_to_do.success:
                    self.next_question(driver, current_question.question_index, errors)
                else:
                    self.do_finish(driver, current_question.question_index, errors)

Alternative:

    if current_question.is_last:
                action = self.next_question if run_to_do.success else self.do_finish
    else:
        action = None

    if action:
        action(driver, current_question.question_index, errors)