Index: asyncssh-2.2.0/tests/test_connection.py
===================================================================
--- asyncssh-2.2.0.orig/tests/test_connection.py
+++ asyncssh-2.2.0/tests/test_connection.py
@@ -1173,7 +1173,7 @@ class _TestConnectionAsyncAcceptor(Serve
 
             conn.logger.info('Acceptor called')
 
-        return (await cls.create_server(_TunnelServer, gss_host=(),
+        return (await cls.create_server(_TunnelServer, gss_host=None,
                                         acceptor=acceptor))
 
     @asynctest