Fatal error: Uncaught Error: Class "PHPUnit_Framework_TestCase" not found in C:\xampp\htdocs\snipe-it\vendor\javiereguiluz\easyslugger\tests\BaseSluggerTest.php:16 Stack trace: #0 {main} thrown in C:\xampp\htdocs\snipe-it\vendor\javiereguiluz\easyslugger\tests\BaseSluggerTest.php on line 16