New features tests fails

Hi, I'm trying to implement the libvirt part of a new feature that has landed in QEMU staging [1]. The current draft of this implementations is the following [2]. It compiles on top of master. But when I want to run the tests suites, I hit an issue I don't managed to find the problem. It runs until: [...] 278/279 libvirt:bin / qemuxmlconftest FAIL 8.63s exit status 1 [...] then it tells me to run the following to understand the issue: VIR_TEST_DEBUG=1 VIR_TEST_RANGE=850-851,854-855 /home/aharivel/work/libvirt/build/tests/qemuxmlconftest It outputs this: [...] 850) QEMU XML def -> XML kvm-features.x86_64-latest ... In '/home/aharivel/work/libvirt/tests/qemuxmlconfdata/kvm-features.x86_64-latest.xml': Offset 533 Expect [ socket='/run/qemu-vmsr-helper.sock'/] Actual [/] ... FAILED 851) QEMU XML OUT -> XML kvm-features.x86_64-latest ... In '/home/aharivel/work/libvirt/tests/qemuxmlconfdata/kvm-features.x86_64-latest.xml': Offset 533 Expect [ socket='/run/qemu-vmsr-helper.sock'/] Actual [/] ... FAILED 854) QEMU XML def -> XML kvm-features-off.x86_64-latest ... In '/home/aharivel/work/libvirt/tests/qemuxmlconfdata/kvm-features-off.x86_64-latest.xml': Offset 527 Expect [/] Actual [ socket='(null)'/] ... FAILED 855) QEMU XML OUT -> XML kvm-features-off.x86_64-latest ... In '/home/aharivel/work/libvirt/tests/qemuxmlconfdata/kvm-features-off.x86_64-latest.xml': Offset 527 Expect [/] Actual [ socket='(null)'/] [...] ... FAILED I certainly did something wrong in the implementation but I don't figure it out. I understand the Expect / Actual tests. I'm guessing the issue is that it needs to run the QEMU version where the feature is possible but I don't see how can tell the test to run this particular version. Any advise would be greatly appreciate. Thanks Regards, Anthony [1] : https://gitlab.com/qemu-project/qemu/-/commit/0418f90809aea5b375c859e744c... [2] : https://github.com/aharivel/libvirt/commit/153a4489f095e063f3c7e0470a8f92...