Example PHPUnit Test on Laravel 5.4 fails with 404

for tests this env variable was wrong...

APP_URL=http://127.0.0.1:8888/streaming_statistic/public

I changed root web server directory to streaming_statistic/public and env to

APP_URL=http://127.0.0.1:8888

After that i got:

OK (1 test, 1 assertion)