I have a .env file containing my database connection details, as is normal for Laravel 5. I want to override these for testing, which I can do in phpunit.
Copy your .env to .env.testing, then edit the .env.testing file and change the APP_ENV parameter to make it like this APP_ENV=testing this way you will be able to specify your settings int this new file
In case you don't want to create a new .env.testing file you have to specify your variables in the phpunit.xml in the php section with the values you need, something like this
Just use the key values in the name section and the value of that key in the value section.
For this example I am specifying phpunit to use an sqlite database with the name of testing.
By the way in config/database.php I added this
'default' => env('DB_CONNECTION', 'mysql'), to use mysql by default unless I specify something diferent, as in this case.