diff --git a/channels/interfaces/websocket_asyncio.py b/channels/interfaces/websocket_asyncio.py
index 55c9ea3..7c7f13c 100644
--- a/channels/interfaces/websocket_asyncio.py
+++ b/channels/interfaces/websocket_asyncio.py
@@ -21,7 +21,7 @@ class WebsocketAsyncioInterface(object):
         self.factory = get_factory(WebSocketServerFactory)("ws://0.0.0.0:%i" % self.port, debug=False)
         self.factory.protocol = get_protocol(WebSocketServerProtocol)
         self.loop = asyncio.get_event_loop()
-        coro = self.loop.create_server(self.factory, '0.0.0.0', 9000)
+        coro = self.loop.create_server(self.factory, '0.0.0.0', self.port)
         server = self.loop.run_until_complete(coro)
         self.loop.run_in_executor(None, self.backend_reader)
         self.loop.call_later(1, self.keepalive_sender)