phpunit --version give me 3.7.21. Which is giving me problem on my laravel 5.6 dump.php file. Checked other related question on stackoverflow

I have installed fresh laravel project 5.6 version. On composer.json I have phpunit version 7. But when i run phpunit, it gives me an error of parse synax error. I have php version 7.2. I have also tried doing phpunit --version on /vendor/bin but it is stil giving me

 phpunit --version
PHPUnit 3.7.21 by Sebastian Bergmann.

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