Having two servers at differenent ports is too much for a default behavior.
In general text sounds good to me. Adjusted it a bit:

> To be able to run acceptance tests you need a running webserver. For this you can use the php bultin server and run it in the directory where your main project folder is located. For example if your application is located in `/www/advanced` all you need to is:
`cd /www` and then `php -S 127.0.0.1:8080` because the default configuration of acceptance tests expects the url of the application to be `/advanced/`.
If you already have a server configured or your application is not located in a folder called `advanced`, you may need to adjust the `TEST_ENTRY_URL` in `frontend/tests/_bootstrap.php` and `backend/tests/_bootstrap.php`.

Here is a version you can copy:

``````markdown
To be able to run acceptance tests you need a running webserver. For this you can use the php bultin server and run it in the directory where your main project folder is located. For example if your application is located in `/www/advanced` all you need to is:
`cd /www` and then `php -S 127.0.0.1:8080` because the default configuration of acceptance tests expects the url of the application to be `/advanced/`.
If you already have a server configured or your application is not located in a folder called `advanced`, you may need to adjust the `TEST_ENTRY_URL` in `frontend/tests/_bootstrap.php` and `backend/tests/_bootstrap.php`.
``````