Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/kedanhe1/public_html/vendor/xantios/mimey/tests/src/MimeMappingBuilderTest.php:9 Stack trace: #0 {main} thrown in /home/kedanhe1/public_html/vendor/xantios/mimey/tests/src/MimeMappingBuilderTest.php on line 9