Fatal error: Uncaught Error: Class 'PHPUnit_Framework_TestCase' not found in C:\xampp\htdocs\fiveplus\vendor\mike42\escpos-php\test\integration\ExampleTest.php:4 Stack trace: #0 {main} thrown in C:\xampp\htdocs\fiveplus\vendor\mike42\escpos-php\test\integration\ExampleTest.php on line 4