PHPUnit error in babysteps

I am studying about TDD and I tried to run tests using phpunit in console, but the console return for me the follow error.

Fatal error: Class 'PHPUnit\Framework\TestCase' not found in E:\xampp\htdocs\estudos\phpunit\tests\MoneyTest.php on line 8

PHP Fatal error: Class 'PHPUnit\Framework\TestCase' not found in E:\xampp\htdocs\estudos\phpunit\tests\MoneyTest.php on line 8

How can I solve this ? I am using PSR-4 to create autoloader in this project

Link from repository with project: http://ift.tt/2aAvXer