diff --git a/tests/python_client/testcases/stability/test_mysql.py b/tests/python_client/testcases/stability/test_mysql.py
index b898fe7b42..8685fe03d5 100644
--- a/tests/python_client/testcases/stability/test_mysql.py
+++ b/tests/python_client/testcases/stability/test_mysql.py
@@ -1,9 +1,5 @@
 import time
-import random
-import pdb
-import threading
 import logging
-from multiprocessing import Pool, Process
 import pytest
 from pymilvus import IndexType