diff -r 4617b7ac302a Lib/test/test_asyncore.py
--- a/Lib/test/test_asyncore.py	Tue Jan 08 11:27:18 2013 +0000
+++ b/Lib/test/test_asyncore.py	Tue Jan 08 15:08:53 2013 -0600
@@ -513,7 +513,7 @@
         pass
 
 
-class BaseTestAPI(unittest.TestCase):
+class BaseTestAPI:
 
     def tearDown(self):
         asyncore.close_all()
@@ -821,25 +821,25 @@
         unlink(self.addr)
         BaseTestAPI.tearDown(self)
 
-class TestAPI_UseIPv4Select(TestAPI_UseIPv4Sockets):
+class TestAPI_UseIPv4Select(TestAPI_UseIPv4Sockets, unittest.TestCase):
     use_poll = False
 
 @unittest.skipUnless(hasattr(select, 'poll'), 'select.poll required')
-class TestAPI_UseIPv4Poll(TestAPI_UseIPv4Sockets):
+class TestAPI_UseIPv4Poll(TestAPI_UseIPv4Sockets, unittest.TestCase):
     use_poll = True
 
-class TestAPI_UseIPv6Select(TestAPI_UseIPv6Sockets):
+class TestAPI_UseIPv6Select(TestAPI_UseIPv6Sockets, unittest.TestCase):
     use_poll = False
 
 @unittest.skipUnless(hasattr(select, 'poll'), 'select.poll required')
-class TestAPI_UseIPv6Poll(TestAPI_UseIPv6Sockets):
+class TestAPI_UseIPv6Poll(TestAPI_UseIPv6Sockets, unittest.TestCase):
     use_poll = True
 
-class TestAPI_UseUnixSocketsSelect(TestAPI_UseUnixSockets):
+class TestAPI_UseUnixSocketsSelect(TestAPI_UseUnixSockets, unittest.TestCase):
     use_poll = False
 
 @unittest.skipUnless(hasattr(select, 'poll'), 'select.poll required')
-class TestAPI_UseUnixSocketsPoll(TestAPI_UseUnixSockets):
+class TestAPI_UseUnixSocketsPoll(TestAPI_UseUnixSockets, unittest.TestCase):
     use_poll = True
 
 def test_main():