SVRUnit can also be used to test different files and requirements on your server after a deployment.
Just imagine that you need to test that your .env file exists, or that your cache folder has the correct permission.
There's plenty of things you can do here.
Because SVRUnit allows you to install it with Composer, it is recommended to install it directly as dependency. You can of course also use the PHAR file for this.
composerrequiresvrunit/svrunit
Now create a XML configuration file that specifies a single YML test file (or more...)