PendingDeprecationWarning -> DeprecationWarning.  Both of these were
properly documented as being deprecated in 3.1.
diff --git a/Lib/unittest.py b/Lib/unittest.py
index ce990b7..611088b 100644
--- a/Lib/unittest.py
+++ b/Lib/unittest.py
@@ -680,7 +680,7 @@
         def deprecated_func(*args, **kwargs):
             warnings.warn(
                 'Please use {0} instead.'.format(original_func.__name__),
-                PendingDeprecationWarning, 2)
+                DeprecationWarning, 2)
             return original_func(*args, **kwargs)
         return deprecated_func