Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/trombino/public_html/sanctions.trombino.org/vendor_1/ezimuel/guzzlestreams/tests/AppendStreamTest.php:9 Stack trace: #0 {main} thrown in /home/trombino/public_html/sanctions.trombino.org/vendor_1/ezimuel/guzzlestreams/tests/AppendStreamTest.php on line 9