Fatal error: Class 'Whoops\TestCase' not found in /var/www/html/dev/spa/vendor/filp/whoops/tests/Whoops/Handler/JsonResponseHandlerTest.php on line 13

Call Stack:
    0.0005     253192   1. {main}() /var/www/html/dev/spa/vendor/filp/whoops/tests/Whoops/Handler/JsonResponseHandlerTest.php:0