Codeception collects and shares best practices and solutions for testing PHP web applications. With a flexible set of included modules tests are easy to write, easy to use and easy to maintain. Tests can be executed using Firefox, Chrome, Safari or Cloud Testing services with Selenium WebDriver. Browser can be emulated with HTTP-requests through CURL with PhpBrowser. Codeception provides high-level domain language for tests. Tests are represented as a set of user's actions. Tests can be executed inside a PHP framework. This way web applications can be executed without web servers to run faster and access application internals. Symfony, Laravel, Zend Framework, Yii, Phalcon are supported. Connect to various data sources MySQL, PostgreSQL, MongoDB, Redis, Memcache to use their data inside tests. Take snapshots to compare data changes with previous runs. Codeception is built on top of PHPUnit and is able to execute its tests.