Fatal error: Class 'TestFixture' not found in /var/www/html/dev/spa/vendor/nesbot/carbon/tests/DayOfWeekModifiersTest.php on line 15

Call Stack:
    0.0012     342672   1. {main}() /var/www/html/dev/spa/vendor/nesbot/carbon/tests/DayOfWeekModifiersTest.php:0