virt-sparsify

libguestfs-test-tool

both yield similar error:

supermin: waiting another 1024000000 ns for root UUID to appear
This usually means your kernel doesn't support virtio, or supermin was unable
to load some kernel modules (see module loading messages above).
supermin: waiting another 2048000000 ns for root UUID to appear
supermin: waiting another 4096000000 ns for root UUID to appear

Is there any ways I can test running on a newer kernel?