Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\astra-backoffice\vendor\symfony\mailer\Tests\Transport\AbstractTransportTest.php:34
Stack trace:
#0 {main}
thrown in C:\xampp\htdocs\astra-backoffice\vendor\symfony\mailer\Tests\Transport\AbstractTransportTest.php on line 34