Fatal error: Uncaught Error: Class "PHPUnit_Framework_TestCase" not found in /home/systemdecorcom/public_html/sg/vendor/guzzlehttp/psr7/tests/CachingStreamTest.php:10 Stack trace: #0 {main} thrown in /home/systemdecorcom/public_html/sg/vendor/guzzlehttp/psr7/tests/CachingStreamTest.php on line 10