django test runner sample to add custom command line test argument

django_test_runner_custom_arguments.py

from django.test.runner import DiscoverRunner


class CustomTestRunner(DiscoverRunner):

    @classmethod
    def add_arguments(cls, parser):
        parser.add_argument('--headless',
            action='store_true', default=False, dest='headless',
            help='Add this options to do headless browser testing')