diff --git a/docs/topics/testing.txt b/docs/topics/testing.txt
index 82039581e0..18a1052483 100644
--- a/docs/topics/testing.txt
+++ b/docs/topics/testing.txt
@@ -1269,7 +1269,7 @@ testing behavior. This class defines the ``run_tests()`` entry point,
 plus a selection of other methods that are used to by ``run_tests()`` to
 set up, execute and tear down the test suite.
 
-.. class:: DjangoTestSuiteRunner(verbosity=1, interactive=True, failfast=True)
+.. class:: DjangoTestSuiteRunner(verbosity=1, interactive=True, failfast=True, **kwargs)
 
     ``verbosity`` determines the amount of notification and debug information
     that will be printed to the console; ``0`` is no output, ``1`` is normal
@@ -1284,6 +1284,12 @@ set up, execute and tear down the test suite.
     If ``failfast`` is ``True``, the test suite will stop running after the
     first test failure is detected.
 
+    Django will, from time to time, extend the capabilities of
+    the test runner by adding new arguments. The ``**kwargs`` declaration
+    allows for this expansion. If you subclass ``DjangoTestSuiteRunner`` or
+    write your own test runner, ensure accept and handle the ``**kwargs``
+    parameter.
+
 .. method:: DjangoTestSuiteRunner.run_tests(test_labels, extra_tests=[])
 
     Run the test suite.