
Use DJANGO_SETTINGS_MODULE='django_tools_test_project.settings.test'
manage.py run_testserver --nomigrate --nomakemigrations invalid:addr
BASE_PATH:.../django-tools
Test DB: .../django-tools/test_project_db.sqlite3
Use settings: .../django-tools/django_tools_test_project/settings/test.py

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Call "runserver" addrport:'invalid:addr' force_color:False no_color:False traceback:False use_ipv6:False use_reloader:True use_threading:True verbosity:1

CommandError: "invalid:addr" is not a valid port number or address:port pair.