diff --git a/test/py/TestServer.py b/test/py/TestServer.py
index 3d379ea..581bed6 100755
--- a/test/py/TestServer.py
+++ b/test/py/TestServer.py
@@ -103,7 +103,8 @@
 if sys.argv[1] == "THttpServer":
   server = THttpServer.THttpServer(processor, ('', 9090), pfactory)
 else:
-  transport = TSocket.TServerSocket(9090)
+  host = None
+  transport = TSocket.TServerSocket(host, 9090)
   tfactory = TTransport.TBufferedTransportFactory()
 
   if sys.argv[1] == "TNonblockingServer":