Since PHPUnit 7 is out for a while, we'd like to use it instead of PHPUnit 5.7 due to it being up to date with PHP7. However, direct migration is impossible since test recognition relies on extending from the correct base class (which, in this case, still is PHPUnit 5.7). Additionally, some dependencies seem to rely on PHPUnit 5.7 still and don't work together with PHPUnit 7.
Since PHPUnit 7 is out for a while, we'd like to use it instead of PHPUnit 5.7 due to it being up to date with PHP7. However, direct migration is impossible since test recognition relies on extending from the correct base class (which, in this case, still is PHPUnit 5.7). Additionally, some dependencies seem to rely on PHPUnit 5.7 still and don't work together with PHPUnit 7.