If your test fails in some rare cases and you want to see when it fails, you can write a bash script like this for run it over and over.

for i in {1..100}; do     php artisan test --filter test_something; done

It would be better to have this feature built in Laravel but currently I haven't seen it in the docs.

I know it was simple but when we do not code in bash every day, we cant remember its syntax. so consider this like a note to check it when it was required.