Laravel testing with phpunit does not use configured sqlite db

I want to seperate my tests from the actual database. I configuted it following a tutorial from laracasts but it does not seem to actually use the configured stuff. This is my phpunit.xml (relevant part)

<php>
    <env name="APP_ENV" value="testing"/>
    <env name="DB_CONNECTION" value="sqlite"/>
    <env name="DB_DATABASE" value=":memory:"/>
    <env name="CACHE_DRIVER" value="array"/>
    <env name="SESSION_DRIVER" value="array"/>
    <env name="QUEUE_DRIVER" value="sync"/>
</php>

I noticed it will always use my actual database instead of this configured one. I run tests by going into vendor/bin and executing phpunit ../../tests for some reason I can not figure out it won't run out of my root directory even though i ve installed phpunit globally