python3 Failed to establish a new connection: [WinError 10061] 由于目标计算机积极拒绝，无法连接

报错源代码
from selenium import webdriver
import unittest
import time
from HTMLTestRunner import HTMLTestRunner


class BaiDu(unittest.TestCase):

    def setUp(self):
        self.driver = webdriver.Chrome()
        self.driver.maximize_window()
        self.driver.implicitly_wait(10)
        self.base_url = "http://www.baidu.com"

    def test_baidu(self):
        driver = self.driver
        driver.get(self.base_url + "/")
        driver.find_element_by_id("kw").clear()
        driver.find_element_by_id("kw").send_keys("HTMLTestRunner")
        driver.find_element_by_id("su").click()
        time.sleep(2)

    def tearDown(self):
        self.driver.quit()
        self.driver.close()

if __name__ == "__main__":
    testunit = unittest.TestSuite()
    testunit.addTest(BaiDu("test_baidu"))

    # 定义报告存放路径
    fp = open("E:/result.html", 'wb')

    # 定义测试报告
    runner = HTMLTestRunner(stream=fp, title='百度搜索测试报告', description='用例执行情况：')
    runner.run(testunit)  # 运行测试用例
    fp.close()  # 关闭报告文件

解决办法：

把self.driver.close()去掉，即可恢复！