Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /var/www/html/ng-crm/yiiapp/vendor/ralouphie/mimey/tests/src/MimeMappingBuilderTest.php:9 Stack trace: #0 {main} thrown in /var/www/html/ng-crm/yiiapp/vendor/ralouphie/mimey/tests/src/MimeMappingBuilderTest.php on line 9