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

I got the same error but none worked,

except for this one, this worked for me,

I tried reinstalling and upgrading my phpunit in Laravel 5.4,

1. modify compose.json -> find these line and change the phpunit version

   "require-dev": { "phpunit/phpunit": "~6.4" },

2. after editing, run on your cmd,

   composer update

3. then run

   composer dump-autoload

4. php artisan config:clear

5. php artisan cache:clear

6. finally, run phpunit

or run specific unit, phpunit --filter yourTestCaseClass