Add missing import.
diff --git a/Lib/test/test_docxmlrpc.py b/Lib/test/test_docxmlrpc.py
index da22f61..c7b7775 100644
--- a/Lib/test/test_docxmlrpc.py
+++ b/Lib/test/test_docxmlrpc.py
@@ -3,6 +3,7 @@
 from test import test_support
 import threading
 import time
+import socket
 import unittest
 import xmlrpclib