Selenium server configuration

Setup is based on the 2.x serie of the "Selenium Standalone Server", installed as a system.d service, and ran by the "vagrant" user to avoid permissions issues. You can start/stop it as any other services, using:

sudo service selenium stop
sudo service selenium start

The java jar itself will listen on the default port 4444.


We currently use Firefox as the browser, using the web driver built-in selenium. To use Selenium with Behat/Mink, you will need to composer require behat/mink-selenium2-driver and to add something similar to

        capabilities: {"browser": "firefox", "version": "52"}

in your behat.yml file.

Display manager

You can choose between two display managers to run your tests, set by the selenium_display_manager variable.


This is a light "headless" display manager, commonly used to run tests on servers.


Offers an alternative approach to the standard XVFB method, allowing you to visually "see" the tests running in the browser, which can be very useful to understand failures.

It uses TightVNC as the server, and you should be able to use any VNC-compatible client on your host (eg. the Mac OS built-in one).

  1. Open vnc:// in your VNC client (password is "vagrant").
  2. Run your tests - from either an ssh session in the VM or the xterminal within the remote desktop - and you should see Firefox actually perform the steps.