diff --git a/test/test_http_proxy.py b/test/test_http_proxy.py
index 177830ece..b8c5188c3 100644
--- a/test/test_http_proxy.py
+++ b/test/test_http_proxy.py
@@ -4,7 +4,6 @@
 import functools
 import json
 import os
-import platform
 import random
 import ssl
 import threading
@@ -241,9 +240,11 @@ def proxy_server(proxy_server_class, request_handler, bind_ip=None, **proxy_serv
             yield f'{bind_address}:{server_port}'
     finally:
         server.shutdown()
+        server.server_close()
         server_thread.join()
 
 
+
 class HTTPProxyTestContext(abc.ABC):
     REQUEST_HANDLER_CLASS = None
     REQUEST_PROTO = None