Fixed #23863 -- Made runtests accept the keepdb option.

        setattr(settings, key, value)

def django_tests(verbosity, interactive, failfast, test_labels):

def django_tests(verbosity, interactive, failfast, keepdb, test_labels):

    state = setup(verbosity, test_labels)

    extra_tests = []

        verbosity=verbosity,

        interactive=interactive,

        failfast=failfast,

        keepdb=keepdb,

    )

    # Catch warnings thrown in test DB setup -- remove in Django 1.9

    with warnings.catch_warnings():

        '--failfast', action='store_true', dest='failfast', default=False,

        help='Tells Django to stop running the test suite after first failed '

             'test.')

    parser.add_argument(

        '-k', '--keepdb', action='store_true', dest='keepdb', default=False,

        help='Tells Django to preserve the test database between runs.')

    parser.add_argument(

        '--settings',

        help='Python path to settings module, e.g. "myproject.settings". If '

        paired_tests(options.pair, options, options.modules)

    else:

        failures = django_tests(options.verbosity, options.interactive,

                                options.failfast, options.modules)

                                options.failfast, options.keepdb,

                                options.modules)

        if failures:

            sys.exit(bool(failures))