Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/bwjzwsaz/public_html/alumni.aaa.org.pk/vendor/bitpay/key-utils/test/unit/BitPayKeyUtils/KeyHelper/SinKeyTest.php:9 Stack trace: #0 {main} thrown in /home/bwjzwsaz/public_html/alumni.aaa.org.pk/vendor/bitpay/key-utils/test/unit/BitPayKeyUtils/KeyHelper/SinKeyTest.php on line 9