Can't run test

PHPUnit version

```
❯ ./vendor/bin/phpunit --version
PHPUnit 9.5.4 by Sebastian Bergmann and contributors.
```

Issue:
```
❯ ./vendor/bin/phpunit
PHPUnit 9.5.4 by Sebastian Bergmann and contributors.

Could not use "PHPUnit_TextUI_ResultPrinter" as printer: class does not exist
```

Any idea?