[Tails-dev] Fail to setup test suite

Hi,

I followed the version devel version of
contribute/release_process/test/setup.mdwn

I tried to run the test suite from both devel, experimental and
test/rjb-migration with the following command:

./run_test_suite --view \
--iso ../iso/tails-i386-experimental-0.23-20140121.iso \
features/torified_browsing.feature

It always fails with the following message:

    And I start the computer
    #features/step_definitions/common_steps.rb:135 
    Call to virDomainCreateWithFlags failed: unsupported configuration:
    ich9-usb-ehci1 not supported in this QEMU binary (Libvirt::Error) 
    ./features/support/helpers/vm_helper.rb:355:in `create' 
    ./features/support/helpers/vm_helper.rb:355:in `start' 
    ./features/step_definitions/common_steps.rb:139:in `/^I start the 
    computer$/' 
    features/torified_browsing.feature:10:in `And I start the computer'

I have qemu-system-x86 version 1.7.0+dfsg-2~bpo70+2 from
wheezy-backports.

Did I do something wrong? Should I take time to debug that?

Cheers