diff --git a/acme/acme/standalone.py b/acme/acme/standalone.py
index b0d8f08bd..49759bc07 100644
--- a/acme/acme/standalone.py
+++ b/acme/acme/standalone.py
@@ -55,7 +55,8 @@ class ACMEServerMixin:  # pylint: disable=old-style-class
 
     def serve_forever2(self):
         """Serve forever, until other thread calls `shutdown2`."""
-        logger.debug("Starting server at %s:%d...", *self.socket.getsockname())
+        logger.debug("Starting server at %s:%d...",
+                     *self.socket.getsockname()[:2])
         while not self._stopped:
             self.handle_request()
 
diff --git a/acme/acme/standalone_test.py b/acme/acme/standalone_test.py
index 5dd6c2952..349581a3d 100644
--- a/acme/acme/standalone_test.py
+++ b/acme/acme/standalone_test.py
@@ -101,8 +101,8 @@ class DVSNIServerTest(unittest.TestCase):
         self.assertFalse(self.server._stopped)
 
     def test_dvsni(self):
-        cert = crypto_util.probe_sni(
-            b'localhost', *self.server.socket.getsockname())
+        host, port = self.server.socket.getsockname()[:2]
+        cert = crypto_util.probe_sni(b'localhost', host=host, port=port)
         self.assertEqual(jose.ComparableX509(cert),
                          jose.ComparableX509(self.certs[b'localhost'][1]))
 
diff --git a/letsencrypt/plugins/standalone.py b/letsencrypt/plugins/standalone.py
index d548b2162..d4dddc7f6 100644
--- a/letsencrypt/plugins/standalone.py
+++ b/letsencrypt/plugins/standalone.py
@@ -77,7 +77,7 @@ class ServerManager(object):
 
         # if port == 0, then random free port on OS is taken
         # pylint: disable=no-member
-        _, real_port = server.socket.getsockname()
+        real_port = server.socket.getsockname()[1]
         self._instances[real_port] = self._Instance(server, thread)
         return server
 
@@ -89,7 +89,7 @@ class ServerManager(object):
         """
         instance = self._instances[port]
         logger.debug("Stopping server at %s:%d...",
-                     *instance.server.socket.getsockname())
+                     *instance.server.socket.getsockname()[:2])
         instance.server.shutdown2()
         instance.thread.join()
         del self._instances[port]