diff --git a/shadowsocks/asyncdns.py b/shadowsocks/asyncdns.py
index 55fbb11..009c2d3 100644
--- a/shadowsocks/asyncdns.py
+++ b/shadowsocks/asyncdns.py
@@ -447,40 +447,3 @@ class DNSResolver(object):
         if self._sock:
             self._sock.close()
             self._sock = None
-
-
-def test():
-    logging.getLogger('').handlers = []
-    logging.basicConfig(level=logging.DEBUG,
-                        format='%(asctime)s %(levelname)-8s %(message)s',
-                        datefmt='%Y-%m-%d %H:%M:%S', filemode='a+')
-
-    def _callback(address, error):
-        print error, address
-
-    loop = eventloop.EventLoop()
-    resolver = DNSResolver()
-    resolver.add_to_loop(loop)
-
-    for hostname in ['www.google.com',
-                     '8.8.8.8',
-                     'localhost',
-                     'activate.adobe.com',
-                     'www.twitter.com',
-                     'ipv6.google.com',
-                     'ipv6.l.google.com',
-                     'www.gmail.com',
-                     'r4---sn-3qqp-ioql.googlevideo.com',
-                     'www.baidu.com',
-                     'www.a.shifen.com',
-                     'm.baidu.jp',
-                     'www.youku.com',
-                     'www.twitter.com',
-                     'ipv6.google.com']:
-        resolver.resolve(hostname, _callback)
-
-    loop.run()
-
-
-if __name__ == '__main__':
-    test()