anchor.diff:            "umount /tmp/mnt",
             "zpool destroy rpool",
             "udevadm settle"
  -
  -        );
  -
  +        )
         '' + extraTest;
   
       };
  
positive.code:   unstable = makeZfsTest "unstable" {
      enableUnstable = true;
      extraTest = ''
        $machine->succeed(
          "echo password | zpool create -o altroot='/tmp/mnt' -O encryption=aes-256-gcm -O keyformat=passphrase rpool /dev/vdb1",
          "zfs create -o mountpoint=legacy rpool/root",
          "mount -t zfs rpool/root /tmp/mnt",
          "udevadm settle",
  
negative.code:         };
  
        testScript = ''
          machine.succeed("modprobe zfs")
          machine.succeed("zpool status")
  
          machine.succeed("ls /dev")
  
          machine.succeed(
            "mkdir /tmp/mnt",
  
            "udevadm settle",
  