diff --git a/app/test/test_bug551_DingZeYu.py b/app/test/test_bug551_DingZeYu.py
new file mode 100644
index 0000000..799a562
--- /dev/null
+++ b/app/test/test_bug551_DingZeYu.py
@@ -0,0 +1,26 @@
+import time
+import pytest
+from selenium import webdriver
+from selenium.webdriver import ActionChains
+from selenium.webdriver.common.by import By
+
+
+def test_bug551():
+    driver = webdriver.Edge()
+    driver.maximize_window()
+    driver.get("http://127.0.0.1:5000/")
+
+    driver.find_element(By.CSS_SELECTOR, 'a[href="/login"]').click()
+    driver.find_element(By.CLASS_NAME, 'username').send_keys('dzy')
+    driver.find_element(By.CLASS_NAME, 'password').send_keys('123456')
+    driver.find_element(By.CLASS_NAME, 'btn').click()
+
+    article = driver.find_element(By.ID, 'article')
+    actions = ActionChains(driver)
+
+    actions.move_to_element(article)
+    actions.click_and_hold()
+    actions.move_by_offset(450, 200)
+    actions.release()
+    actions.perform()
+    time.sleep(5)