Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/awsuser/subdomains/ai.betterquo.com/vendor/yoomoney/yookassa-sdk-validator/tests/Constraints/NotNullTest.php:8 Stack trace: #0 {main} thrown in /home/awsuser/subdomains/ai.betterquo.com/vendor/yoomoney/yookassa-sdk-validator/tests/Constraints/NotNullTest.php on line 8