laravel fatal error for TestCase not found

Question

http://localhost/laravel/app/tests/ExampleTest.php

if i run laravel it shows the following error

Fatal error: Class \'TestCase\' not found in D

Answer 1

The is caused by an outdated phpunit. If you using a globally installed phpunit, here is a link on how to update it https://stackoverflow.com/a/40701333/3792206 . Or you can explicitly use the phpunit that was installed with the project.