diff -r b79025925eab Lib/test/test_time.py
--- a/Lib/test/test_time.py	Wed Apr 03 13:49:36 2013 +0100
+++ b/Lib/test/test_time.py	Wed Apr 10 13:55:37 2013 -0500
@@ -459,10 +459,6 @@
         time.strftime("%B", (2009,2,1,0,0,0,0,0,0))
 
 
-class _BaseYearTest(unittest.TestCase):
-    def yearstr(self, y):
-        raise NotImplementedError()
-
 class _TestAsctimeYear:
     _format = '%d'
 
@@ -520,7 +516,7 @@
     del skip_if_not_supported
 
 
-class _Test4dYear(_BaseYearTest):
+class _Test4dYear:
     _format = '%d'
 
     def test_year(self, fmt=None, func=None):
@@ -553,10 +549,10 @@
         self.assertRaises(OverflowError, self.yearstr, TIME_MINYEAR - 1)
 
 
-class TestAsctime4dyear(_TestAsctimeYear, _Test4dYear):
+class TestAsctime4dyear(_TestAsctimeYear, _Test4dYear, unittest.TestCase):
     pass
 
-class TestStrftime4dyear(_TestStrftimeYear, _Test4dYear):
+class TestStrftime4dyear(_TestStrftimeYear, _Test4dYear, unittest.TestCase):
     pass
 
 
@@ -673,13 +669,6 @@
         self.assertIs(lt.tm_gmtoff, None)
         self.assertIs(lt.tm_zone, None)
 
-def test_main():
-    support.run_unittest(
-        TimeTestCase,
-        TestLocale,
-        TestAsctime4dyear,
-        TestStrftime4dyear,
-        TestPytime)
 
 if __name__ == "__main__":
-    test_main()
+    unittest.main()