Can you add the following environment variable to your project:
DBUS_SESSION_BUS_ADDRESS = /dev/null
You can do this via the CircleCI UI: Project settings > Environment Variables
Or in circle.yml
:
machine:
environment:
DBUS_SESSION_BUS_ADDRESS: /dev/null
Do let us know if that helps or not. Our testing suggests that this resolves issues related to x11-dbus and Xvfb in containerized environments with flaky browser testing using Selenium, Chrome / Firefox.