HTMLTestRunner测试报告执行问题

使用HTMLTestRunner生成报告时会执行两次用例，

@parameterized.expand(get_data())
    def test_calculate(self, a, b, expect):
        # 清屏
        self.calculate.page_button_clear()
        self.calculate.page_button_number(a)
        self.calculate.page_button_add()
        self.calculate.page_button_number(b)
        self.calculate.page_button_equal()
        # 它有返回值,强制转换为int，好比较
        result = int(self.calculate.page_get_result())
        try:
            self.assertEqual(result, expect)

        except AssertionError:
            self.calculate.page_get_image()
            raise
    # 无限循环

class Report: @staticmethod def test_report(): # suite = unittest.TestSuite() suite = unittest.TestLoader().discover('./', pattern='test_ca*.py') # suite.addTest(unittest.TestLoader().loadTestsFromTestCase(TestCase)) with open('../report-/{}html'.format(time.strftime('%Y_%m_%d %H_%M_%S')), 'wb') as f: HTMLTestRunner(stream=f, verbosity=2, title='测试报告', description='计算器').run(suite)
suite = unittest.TestLoader().discover(’./’, pattern=‘test_ca*.py’)是因为’test_ca*.py’中的test_calculate方法已经执行了一次，请问有什么好的方法让用例只执行一次呢