Document the fact that the 'test' package is meant only for use by Python
itself and not by others.
Closes issue 9255.
diff --git a/Doc/library/test.rst b/Doc/library/test.rst
index 3b9ad10..d6ff734 100644
--- a/Doc/library/test.rst
+++ b/Doc/library/test.rst
@@ -5,6 +5,13 @@
:synopsis: Regression tests package containing the testing suite for Python.
.. sectionauthor:: Brett Cannon <brett@python.org>
+.. note::
+ The :mod:`test` package is meant for internal use by Python only. It is
+ documented for the benefit of the core developers of Python. Any use of
+ this package outside of Python's standard library is discouraged as code
+ mentioned here can change or be removed without notice between releases of
+ Python.
+
The :mod:`test` package contains all regression tests for Python as well as the
modules :mod:`test.support` and :mod:`test.regrtest`.