diff --git a/app/test/test_bug551_XieShangHai.py b/app/test/test_bug551_XieShangHai.py
index 4aa02f2..1d14554 100644
--- a/app/test/test_bug551_XieShangHai.py
+++ b/app/test/test_bug551_XieShangHai.py
@@ -1,49 +1,28 @@
-import pytest
-from selenium import webdriver
 from selenium.webdriver.common.action_chains import ActionChains
 import time
-from webdriver_manager.chrome import ChromeDriverManager
+from helper import signup
 
-@pytest.fixture
-def driver():
-    # 初始化浏览器驱动
-    driver = webdriver.Chrome(ChromeDriverManager().install())
-    driver.maximize_window()
+def test_highlight(driver, URL):
+    try:
+        # 打开网页
+        driver.maximize_window()
+        driver.get(URL)
+    
+        # 注册
+        time.sleep(1)
+        signup(URL, driver)
+        time.sleep(2)
 
-    yield driver
-    # 测试结束后关闭浏览器
-    driver.quit()
+        # 选中单词（移动鼠标到起点位置、按下鼠标左键、拖动鼠标到结束位置、释放鼠标左键、执行操作链）
+        article = driver.find_element_by_id("article")
+        actions = ActionChains(driver)
+        actions.move_to_element(article).click_and_hold().move_by_offset(450,60).release().perform()
 
-def test_highlight(driver):
-    # 打开网页
-    driver.get("http://127.0.0.1:5000/")
-
-    # login
-    elem = driver.find_element_by_link_text('登录')
-    elem.click()
-    uname = 'xshh'
-    password = 'kk123ll'
-    elem = driver.find_element_by_id('username')
-    elem.send_keys(uname)
-    elem = driver.find_element_by_id('password')
-    elem.send_keys(password)
-
-    elem = driver.find_element_by_class_name('btn')  # 找到登录按钮
-    elem.click()
-
-    article = driver.find_element_by_id("article")
-
-    # 创建 ActionChains 对象
-    actions = ActionChains(driver)
-
-    # 移动鼠标到起点位置
-    actions.move_to_element(article)
-    # 按下鼠标左键
-    actions.click_and_hold()
-    # 拖动鼠标到结束位置
-    actions.move_by_offset(450,60)
-    # 释放鼠标左键
-    actions.release()
-    # 执行操作链
-    actions.perform()
-    time.sleep(15)
+        # 判断所有高亮单词是否有间隔
+        marks = driver.find_elements_by_tag_name("mark")
+        for mark in marks:
+            assert mark.value_of_css_property("padding") == '0px'
+    finally:
+        # 测试结束后关闭浏览器
+        driver.quit()
+        
\ No newline at end of file