Running Selenium in test environment (Symfony+Behat)

Could anybody give some advice for setting Behat with SF4? When I run behat database is loaded with fixtures for test environment, but Selenium starts browser and tries to find data in dev mode. The only way I managed to run Selenium in test mode is manually setting APP_ENV=test in .env or creating test.php (copy of index.php) with hardcoded test in $env and pointing behat.yml base_url to test.php everything works as expected. But I wanna test Stripe with normal endpoints and having test.php is not an option. My current settings of behat.yml config http://ift.tt/2DDfvaN