Addition of setUpClass and setUpModule shared fixtures to unittest.
diff --git a/Lib/unittest/result.py b/Lib/unittest/result.py
index 22e825a..746967e 100644
--- a/Lib/unittest/result.py
+++ b/Lib/unittest/result.py
@@ -16,6 +16,8 @@
     contain tuples of (testcase, exceptioninfo), where exceptioninfo is the
     formatted traceback of the error that occurred.
     """
+    _previousTestClass = None
+    _moduleSetUpFailed = False
     def __init__(self, stream=None, descriptions=None, verbosity=None):
         self.failures = []
         self.errors = []