diff --git a/Lib/test/test_telnetlib.py b/Lib/test/test_telnetlib.py
index fd5c6f7c3c53..321e052fa9da 100644
--- a/Lib/test/test_telnetlib.py
+++ b/Lib/test/test_telnetlib.py
@@ -38,6 +38,7 @@ def server(evt, serv, dataq=None):
         pass
     finally:
         serv.close()
+        conn.close()
         evt.set()
 
 class GeneralTests(TestCase):