After adding packages below, run composer update name-of-the-package command. Note: Some of the packages might be abandoned.


Composer.json


"require-dev": {
"behat/behat": "2.5.5",
"behat/mink-extension": "1.3.3",
"behat/mink": "1.5.0",
"behat/symfony2-extension": "1.1.2",
"behat/mink-selenium2-driver": "1.1.1",
"behat/mink-browserkit-driver": "1.1.0",
"behat/mink-goutte-driver": "1.0.9",

"guzzle/guzzle": "3.9.2"
}