(Originally this was to reproduce a PHAR not being loadable in PHPStan via autoload_files, but has been resolved.)
Run
$ composer install
$ phive install
$ composer test
$ composer phpstan
What should happen: PHPUnit files are loaded form PHAR properly, and using non-Composer PHPStan binary should load PHPUnit extension properly, and then display a static analysis error regarding PHPUnit's assertSame(true, ...).
By default Phive installs PHPUnit as tools/phpunit, but I've configured to install it as tools/phpunit.phar to make it instantly browsable in PHPStorm for instance.