Fatal error: Class 'Whoops\TestCase' not found in /var/www/html/dev/spa/vendor/filp/whoops/tests/Whoops/Exception/InspectorTest.php on line 15

Call Stack:
    0.0005     242656   1. {main}() /var/www/html/dev/spa/vendor/filp/whoops/tests/Whoops/Exception/InspectorTest.php:0