Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home2/cp805728/public_html/abc/packages/shivella/laravel-bitly/Tests/Client/BitlyClientTest.php:16 Stack trace: #0 {main} thrown in /home2/cp805728/public_html/abc/packages/shivella/laravel-bitly/Tests/Client/BitlyClientTest.php on line 16