Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\laragon\www\wao\vendor\phpoffice\math\tests\Math\Reader\MathMLTest.php:15 Stack trace: #0 {main} thrown in C:\laragon\www\wao\vendor\phpoffice\math\tests\Math\Reader\MathMLTest.php on line 15