Fatal error: Uncaught Error: Class 'UnitTestCase' not found in /var/www/alldocs/home/klewis/website_libs/chargebee/test/ChargeBee/EnvironmentTest.php:3 Stack trace: #0 {main} thrown in /var/www/alldocs/home/klewis/website_libs/chargebee/test/ChargeBee/EnvironmentTest.php on line 3