Fatal error: Uncaught Error: Class 'SebastianBergmann\CodeCoverage\TestCase' not found in E:\xampp\htdocs\key1\vendor\phpunit\php-code-coverage\tests\tests\BuilderTest.php:16 Stack trace: #0 {main} thrown in E:\xampp\htdocs\key1\vendor\phpunit\php-code-coverage\tests\tests\BuilderTest.php on line 16