diff --git a/channels/interfaces/websocket_twisted.py b/channels/interfaces/websocket_twisted.py
index f8a4c4b..1a924ac 100644
--- a/channels/interfaces/websocket_twisted.py
+++ b/channels/interfaces/websocket_twisted.py
@@ -20,7 +20,7 @@ class WebsocketTwistedInterface(object):
         self.port = port
 
     def run(self):
-        self.factory = get_factory(WebSocketServerFactory)("ws://0.0.0.0:%i" % self.port, debug=False)
+        self.factory = get_factory(WebSocketServerFactory)(debug=False)
         self.factory.protocol = get_protocol(WebSocketServerProtocol)
         reactor.listenTCP(self.port, self.factory)
         reactor.callInThread(self.backend_reader)