Fatal error: Uncaught Error: Class "PHPUnit_Framework_TestCase" not found in C:\xampp\htdocs\OFFLINE\Uawa\laravel-version\laravel\vendor\league\oauth1-client\tests\PlainTextSignatureTest.php:25 Stack trace: #0 {main} thrown in C:\xampp\htdocs\OFFLINE\Uawa\laravel-version\laravel\vendor\league\oauth1-client\tests\PlainTextSignatureTest.php on line 25