Fatal error: Uncaught Error: Class 'PHPUnit_Framework_TestCase' not found in E:\xampp\htdocs\api.astka\vendor\sebastian\comparator\tests\DateTimeComparatorTest.php:21 Stack trace: #0 {main} thrown in E:\xampp\htdocs\api.astka\vendor\sebastian\comparator\tests\DateTimeComparatorTest.php on line 21