add new skipping things to __all__
diff --git a/Lib/unittest.py b/Lib/unittest.py
index c67ec06..22f8a3d 100644
--- a/Lib/unittest.py
+++ b/Lib/unittest.py
@@ -55,8 +55,10 @@
##############################################################################
# Exported classes and functions
##############################################################################
-__all__ = ['TestResult', 'TestCase', 'TestSuite', 'TextTestRunner',
- 'TestLoader', 'FunctionTestCase', 'main', 'defaultTestLoader']
+__all__ = ['TestResult', 'TestCase', 'TestSuite', 'ClassTestSuite',
+ 'TextTestRunner', 'TestLoader', 'FunctionTestCase', 'main',
+ 'defaultTestLoader', 'SkipException', 'skip', 'skipIf', 'skipUnless',
+ 'expectedFailure']
# Expose obsolete functions for backwards compatibility
__all__.extend(['getTestCaseNames', 'makeSuite', 'findTestCases'])