[](https://packagist.org/packages/phpunit/phpunit-mock-objects)[](https://php.net/)[](https://travis-ci.org/sebastianbergmann/phpunit-mock-objects)# PHPUnit_MockObject**PHPUnit_MockObject** is the default mock object library for PHPUnit.## Requirements* PHP 5.6 is required but using the latest version of PHP is highly recommended## InstallationYou can add this library as a local, per-project dependency to your project using [Composer](https://getcomposer.org/): composer require phpunit/phpunit-mock-objectsIf you only need this library during development, for instance to run your project's test suite, then you should add it as a development-time dependency: composer require --dev phpunit/phpunit-mock-objects