Comment 1 for bug 1410501

Tested in a fresh VM with 14.04.1 and CDTS installed from the 0.14.2 tarball.
I powered off the VM when running ethernet/maximum-bandwidth_eth0
I resumed my session and selected rerun the last test and it worked for me.

I would be interested if you're able to reproduce it to get the terminal output where you started canonical-driver-test-suite.
Especially the following sequence just after clicking on rerun last test:

ConnectJobReceivers
GuiEngine::ConnectJobReceivers - Done
computed next job 65
Running Job (RunJobs) "2013.com.canonical.certification::ethernet/maximum_bandwidth_eth0"
GuiEngine::SetSessionStateMetadata()
   "/plainbox/SessionStateLegacyAPICompatImpl/140205062246696"
flags : "incomplete"
running_job_name: "/plainbox/job/d424929f96daa71008ebf6a74b8ea774767359932372587574992a109419e89e"
title : "GuiEngine"
app_id : "com.canonical.checkbox-gui"
GuiEngine::RunJobs - Done
GuiEngine::CatchallShowInteractiveUISignalsHandler
GuiEngine::CatchallShowInteractiveUISignalsHandler - Done