Index: Lib/test/test_telnetlib.py
===================================================================
--- Lib/test/test_telnetlib.py	(revision 76000)
+++ Lib/test/test_telnetlib.py	(working copy)
@@ -38,6 +38,7 @@
                     data += item
                 written = conn.send(data)
                 data = data[written:]
+        conn.shutdown(socket.SHUT_WR)
     except socket.timeout:
         pass
     finally: