Fatal error: Uncaught Error: Class 'PHPUnit_Framework_TestCase' not found in C:\xampp\htdocs\enercard\vendor\symfony\translation\Tests\Writer\TranslationWriterTest.php:18 Stack trace: #0 {main} thrown in C:\xampp\htdocs\enercard\vendor\symfony\translation\Tests\Writer\TranslationWriterTest.php on line 18