Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\SuiteCRM-8.9.2\vendor\ezimuel\guzzlestreams\tests\BufferStreamTest.php:8 Stack trace: #0 {main} thrown in C:\xampp\htdocs\SuiteCRM-8.9.2\vendor\ezimuel\guzzlestreams\tests\BufferStreamTest.php on line 8