diff --git a/docs/contributing.txt b/docs/contributing.txt
index b34c704d3c..efc6640d10 100644
--- a/docs/contributing.txt
+++ b/docs/contributing.txt
@@ -659,9 +659,8 @@ To run the tests, ``cd`` to the ``tests/`` directory and type::
     ./runtests.py --settings=path.to.django.settings
 
 Yes, the unit tests need a settings module, but only for database connection
-info, with the ``DATABASE_ENGINE`` setting. You will also need a ``ROOT_URLCONF``
-setting (its value is ignored; it just needs to be present) and a ``SITE_ID``
-setting (any non-zero integer value will do) in order for all the tests to pass.
+info, with the ``DATABASE_ENGINE`` setting. You'll also need a ``ROOT_URLCONF``
+setting (its value is ignored; it just needs to be present).
 
 If you're using the ``sqlite3`` database backend, no further settings are
 needed. A temporary database will be created in memory when running the tests.