Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/peekizt/www/vendor/markrogoyski/math-php/tests/LinearAlgebra/Vector/VectorAxiomsTest.php:51 Stack trace: #0 {main} thrown in /home/peekizt/www/vendor/markrogoyski/math-php/tests/LinearAlgebra/Vector/VectorAxiomsTest.php on line 51