Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/yrdsb11w3creativ/public_html/yrdsb/vendor/symfony/serializer/Tests/Normalizer/DateIntervalNormalizerTest.php:11 Stack trace: #0 {main} thrown in /home/yrdsb11w3creativ/public_html/yrdsb/vendor/symfony/serializer/Tests/Normalizer/DateIntervalNormalizerTest.php on line 11