diff -r 4ff1dc8c0a3c Lib/test/test_dbm.py
--- a/Lib/test/test_dbm.py	Tue Jan 29 21:21:56 2013 +0100
+++ b/Lib/test/test_dbm.py	Wed Jan 30 11:47:56 2013 -0600
@@ -34,7 +34,7 @@
         test.support.unlink(f)
 
 
-class AnyDBMTestCase(unittest.TestCase):
+class AnyDBMTestCase:
     _dict = {'0': b'',
              'a': b'Python:',
              'b': b'Programming',
@@ -119,10 +119,6 @@
 
 
 class WhichDBTestCase(unittest.TestCase):
-    # Actual test methods are added to namespace after class definition.
-    def __init__(self, *args):
-        unittest.TestCase.__init__(self, *args)
-
     def test_whichdb(self):
         for module in dbm_iterator():
             # Check whether whichdb correctly guesses module name
@@ -169,12 +165,16 @@
         self.d.close()
 
 
-def test_main():
-    classes = [WhichDBTestCase]
+def load_tests(loader, tests, pattern):
+    classes = []
     for mod in dbm_iterator():
-        classes.append(type("TestCase-" + mod.__name__, (AnyDBMTestCase,),
+        classes.append(type("TestCase-" + mod.__name__,
+                            (AnyDBMTestCase, unittest.TestCase),
                             {'module': mod}))
-    test.support.run_unittest(*classes)
+    suites = [unittest.makeSuite(c) for c in classes]
+
+    tests.addTests(suites)
+    return tests
 
 if __name__ == "__main__":
-    test_main()
+    unittest.main()
diff -r 4ff1dc8c0a3c Lib/test/test_dbm_dumb.py
--- a/Lib/test/test_dbm_dumb.py	Tue Jan 29 21:21:56 2013 +0100
+++ b/Lib/test/test_dbm_dumb.py	Wed Jan 30 11:47:56 2013 -0600
@@ -29,9 +29,6 @@
              '\u00fc'.encode('utf-8') : b'!',
              }
 
-    def __init__(self, *args):
-        unittest.TestCase.__init__(self, *args)
-
     def test_dumbdbm_creation(self):
         f = dumbdbm.open(_fname, 'c')
         self.assertEqual(list(f.keys()), [])
@@ -195,11 +192,6 @@
     def setUp(self):
         _delete_files()
 
-def test_main():
-    try:
-        support.run_unittest(DumbDBMTestCase)
-    finally:
-        _delete_files()
 
 if __name__ == "__main__":
-    test_main()
+    unittest.main()
diff -r 4ff1dc8c0a3c Lib/test/test_dbm_gnu.py
--- a/Lib/test/test_dbm_gnu.py	Tue Jan 29 21:21:56 2013 +0100
+++ b/Lib/test/test_dbm_gnu.py	Wed Jan 30 11:47:56 2013 -0600
@@ -81,8 +81,5 @@
         self.assertTrue(size1 > size2 >= size0)
 
 
-def test_main():
-    run_unittest(TestGdbm)
-
 if __name__ == '__main__':
-    test_main()
+    unittest.main()
diff -r 4ff1dc8c0a3c Lib/test/test_dbm_ndbm.py
--- a/Lib/test/test_dbm_ndbm.py	Tue Jan 29 21:21:56 2013 +0100
+++ b/Lib/test/test_dbm_ndbm.py	Wed Jan 30 11:47:56 2013 -0600
@@ -36,8 +36,5 @@
             except error:
                 self.fail()
 
-def test_main():
-    support.run_unittest(DbmTestCase)
-
 if __name__ == '__main__':
-    test_main()
+    unittest.main()