diff --git a/Lib/test/test_socket.py b/Lib/test/test_socket.py
index 39bb10caaa0..06b9a0d5141 100644
--- a/Lib/test/test_socket.py
+++ b/Lib/test/test_socket.py
@@ -3999,10 +3999,12 @@ def isTipcAvailable():
         print("TIPC module is not loaded, please 'sudo modprobe tipc'")
     return False
 
-class TIPCTest (unittest.TestCase):
+class TIPCTest(unittest.TestCase):
     def testRDM(self):
         srv = socket.socket(socket.AF_TIPC, socket.SOCK_RDM)
         cli = socket.socket(socket.AF_TIPC, socket.SOCK_RDM)
+        self.addCleanup(srv.close)
+        self.addCleanup(cli.close)
 
         srv.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
         srvaddr = (socket.TIPC_ADDR_NAMESEQ, TIPC_STYPE,
@@ -4019,13 +4021,14 @@ def testRDM(self):
         self.assertEqual(msg, MSG)
 
 
-class TIPCThreadableTest (unittest.TestCase, ThreadableTest):
+class TIPCThreadableTest(unittest.TestCase, ThreadableTest):
     def __init__(self, methodName = 'runTest'):
         unittest.TestCase.__init__(self, methodName = methodName)
         ThreadableTest.__init__(self)
 
     def setUp(self):
         self.srv = socket.socket(socket.AF_TIPC, socket.SOCK_STREAM)
+        self.addCleanup(self.srv.close)
         self.srv.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
         srvaddr = (socket.TIPC_ADDR_NAMESEQ, TIPC_STYPE,
                 TIPC_LOWER, TIPC_UPPER)
@@ -4033,6 +4036,7 @@ def setUp(self):
         self.srv.listen(5)
         self.serverExplicitReady()
         self.conn, self.connaddr = self.srv.accept()
+        self.addCleanup(self.conn.close)
 
     def clientSetUp(self):
         # The is a hittable race between serverExplicitReady() and the
@@ -4040,6 +4044,7 @@ def clientSetUp(self):
         # we could get an exception
         time.sleep(0.1)
         self.cli = socket.socket(socket.AF_TIPC, socket.SOCK_STREAM)
+        self.addCleanup(self.cli.close)
         addr = (socket.TIPC_ADDR_NAME, TIPC_STYPE,
                 TIPC_LOWER + int((TIPC_UPPER - TIPC_LOWER) / 2), 0)
         self.cli.connect(addr)