diff --git a/Doc/library/unittest.rst b/Doc/library/unittest.rst
index fefae04..494c2d7 100644
--- a/Doc/library/unittest.rst
+++ b/Doc/library/unittest.rst
@@ -891,6 +891,10 @@
          with self.failUnlessRaises(some_error_class):
              do_something()
 
+      The context manager will store the caught exception object in its
+      :attr:`exc_value` attribute.  This can be useful if the intention
+      is to perform additional checks on the exception raised.
+
       .. versionchanged:: 3.1
          Added the ability to use :meth:`assertRaises` as a context manager.
 
diff --git a/Doc/library/weakref.rst b/Doc/library/weakref.rst
index 9aaa58a..d4751b1 100644
--- a/Doc/library/weakref.rst
+++ b/Doc/library/weakref.rst
@@ -61,6 +61,9 @@
 frozensets, file objects, :term:`generator`\s, type objects, sockets, arrays,
 deques, and regular expression pattern objects.
 
+.. versionchanged:: 2.7
+   Added support for thread.lock and threading.Lock.
+
 Several built-in types such as :class:`list` and :class:`dict` do not directly
 support weak references but can add support through subclassing::