diff --git a/app/test/test_bug551_DingZeYu.py b/app/test/test_bug551_DingZeYu.py
index 42df637..05fedcc 100644
--- a/app/test/test_bug551_DingZeYu.py
+++ b/app/test/test_bug551_DingZeYu.py
@@ -6,14 +6,31 @@ from selenium.webdriver.common.by import By
 from selenium.webdriver.common.alert import Alert
 from selenium.webdriver.support import expected_conditions as EC
 from selenium.webdriver.support.wait import WebDriverWait
-from helper import signup
+
 
 def test_bug551():
     driver = webdriver.Edge()
     driver.maximize_window()
     driver.get("http://127.0.0.1:5000/")
 
-    username, password = signup("http://127.0.0.1:5000/", driver)
+    driver.find_element(By.CSS_SELECTOR, 'a[href="/login"]').click()
+    driver.find_element(By.ID, 'username').send_keys('dzy')
+    driver.find_element(By.ID, 'password').send_keys('123456')
+    driver.find_element(By.CLASS_NAME, 'btn').click()
+
+    try:
+        alert = WebDriverWait(driver, 10).until(EC.alert_is_present())
+        alert.accept()
+        driver.find_element(By.CSS_SELECTOR, 'a[href="/signup"]').click()
+        driver.find_element(By.ID, 'username').send_keys('dzy')
+        driver.find_element(By.ID, 'password').send_keys('123456')
+        driver.find_element(By.ID, 'password2').send_keys('123456')
+        driver.find_element(By.CLASS_NAME, 'btn').click()
+        alert = WebDriverWait(driver, 10).until(EC.alert_is_present())
+        alert.accept()
+
+    except:
+        pass
 
     article = driver.find_element(By.ID, 'article')
     actions = ActionChains(driver)
@@ -23,4 +40,4 @@ def test_bug551():
     actions.move_by_offset(450, 200)
     actions.release()
     actions.perform()
-    time.sleep(5)
+    time.sleep(5)
\ No newline at end of file