Corrected DiscoverRunner.build_suite() signature.
Follow up to
@@ -632,7 +632,7 @@ Methods
:func:`~django.test.utils.setup_test_environment` and setting
:setting:`DEBUG` to ``self.debug_mode`` (defaults to ``False``).
-.. method:: DiscoverRunner.build_suite(test_labels, extra_tests=None, **kwargs)
+.. method:: DiscoverRunner.build_suite(test_labels=None, extra_tests=None, **kwargs)
Constructs a test suite that matches the test labels provided.
