def METHOD_NAME(uvm_nano):
    """
    Test a guest microVM *without* an entropy device and ensure that
    we cannot get data from /dev/hwrng
    """
    vm = uvm_nano
    vm.add_net_iface()
    vm.start()
    # If the guest kernel has been built with the virtio-rng module
    # the device should exist in the guest filesystem but we should
    # not be able to get random numbers out of it.
    cmd = "test -e /dev/hwrng"
    ecode, _, _ = vm.ssh.run(cmd)
    assert ecode == 0
    cmd = "dd if=/dev/hwrng of=/dev/null bs=10 count=1"
    ecode, _, _ = vm.ssh.run(cmd)
    assert ecode == 1