diff --git a/tests/utils.py b/tests/utils.py
index 32636b7936c..145cad0b317 100644
--- a/tests/utils.py
+++ b/tests/utils.py
@@ -20,6 +20,7 @@ class HttpServerThread(threading.Thread):
     def __init__(self, handler, *args, **kwargs):
         super().__init__(*args, **kwargs)
         self.server = http.server.ThreadingHTTPServer(("localhost", 7777), handler)
+        self.server.daemon_threads = False
 
     def run(self):
         self.server.serve_forever(poll_interval=0.001)