Behat failures with Selenium

[fiasco]

My system information:

• Operating system type: TravisCI
• Operating system version: TravisCI
• BLT version: 8.6.15

When I run this command:

blt tests:selenium:launch

I get the following output:

blt > tests:selenium:launch:
blt > tests:selenium:kill:
     [echo] Killing any selenium processes that are already running.
     [echo] Launching Selenium standalone server.
    [touch] Creating /home/travis/build/EnergyAustralia/eaweb/reports/selenium2.log
     [echo] Selenium2 logs are being written to /home/travis/build/EnergyAustralia/eaweb/reports/selenium2.log.
     [echo] Waiting 15 seconds for Selenium standalone server (http://127.0.0.1:4444) to become available.
Possible malformed URL: http://127.0.0.1:4444/wd/hub
Possible malformed URL: http://127.0.0.1:4444/wd/hub
Possible malformed URL: http://127.0.0.1:4444/wd/hub
Possible malformed URL: http://127.0.0.1:4444/wd/hub
Possible malformed URL: http://127.0.0.1:4444/wd/hub
Possible malformed URL: http://127.0.0.1:4444/wd/hub
Possible malformed URL: http://127.0.0.1:4444/wd/hub
Possible malformed URL: http://127.0.0.1:4444/wd/hub
Possible malformed URL: http://127.0.0.1:4444/wd/hub
Possible malformed URL: http://127.0.0.1:4444/wd/hub
Possible malformed URL: http://127.0.0.1:4444/wd/hub
Possible malformed URL: http://127.0.0.1:4444/wd/hub
Possible malformed URL: http://127.0.0.1:4444/wd/hub
Possible malformed URL: http://127.0.0.1:4444/wd/hub
Possible malformed URL: http://127.0.0.1:4444/wd/hub
[phingcall] /home/travis/build/EnergyAustralia/eaweb/./vendor/acquia/blt/phing/tasks/tests.xml:129:8: /home/travis/build/EnergyAustralia/eaweb/./vendor/acquia/blt/phing/tasks/tests.xml:149:12: /home/travis/build/EnergyAustralia/eaweb/./vendor/acquia/blt/phing/tasks/tests.xml:152:18: Unable to start Selenium2 standalone server on http://127.0.0.1:4444/wd/hub.

After quite a bit of debugging on Travis CI (as this worked locally) I came across this post: http://stackoverflow.com/questions/32707201/selenium-standalone-server-not-starting which suggested changing java.security.egd to use /dev/urandom which worked a treat. It seems that in certain circumstances, /dev/random doesn't produce the entropy needed in Travis and this causes selenium to stall and BLT to timeout.