diff --git a/Lib/test/test_telnetlib.py b/Lib/test/test_telnetlib.py
index d57fda13374..3f5976b3f85 100644
--- a/Lib/test/test_telnetlib.py
+++ b/Lib/test/test_telnetlib.py
@@ -19,6 +19,7 @@ def server(evt, serv):
         pass
     finally:
         serv.close()
+        conn.close()
         evt.set()
 
 class GeneralTests(TestCase):