Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/yrdsb11w3creativ/public_html/vendor/ezimuel/guzzlestreams/tests/AppendStreamTest.php:9 Stack trace: #0 {main} thrown in /home/yrdsb11w3creativ/public_html/vendor/ezimuel/guzzlestreams/tests/AppendStreamTest.php on line 9