It looks like we have python2 vs python3 issues.

S:checkds:Wed 25 Oct 2017 16:43:54 AEDT
T:checkds:1:A
A:System test checkds
I:checking for correct DS, looking up key via 'dig' (1)
I:checking for correct DS, obtaining key from file (2)
I:checking for correct DLV, looking up key via 'dig' (3)
I:checking for correct DLV, obtaining key from file (4)
I:checking for incorrect DS, lowronging up key via 'dig' (5)
I:checking for incorrect DS, obtaining key from file (6)
I:checking for incorrect DLV, lowronging up key via 'dig' (7)
I:checking for incorrect DLV, obtaining key from file (8)
I:checking for partially missing DS, looking up key via 'dig' (9)
I:checking for partially missing DS, obtaining key from file (10)
I:checking for partially missing DLV, looking up key via 'dig' (11)
I:checking for partially missing DLV, obtaining key from file (12)
I:checking for entirely missing DS, looking up key via 'dig' (13)
I:checking for entirely missing DS, obtaining key from file (14)
I:checking for entirely missing DLV, looking up key via 'dig' (15)
I:checking for entirely missing DLV, obtaining key from file (16)
I:checking with prepared dsset file (17)
Traceback (most recent call last):
  File "/Users/marka/git/bind9/bin/python/dnssec-checkds", line 24, in <module>
    isc.checkds.main()
  File "/Users/marka/git/bind9/bin/python/isc/checkds.py", line 188, in main
    found = check(args.zone, args)
  File "/Users/marka/git/bind9/bin/python/isc/checkds.py", line 103, in check
    rrlist.append(SECRR(line, args.lookaside))
  File "/Users/marka/git/bind9/bin/python/isc/checkds.py", line 37, in __init__
    fields = rrtext.decode('ascii').split()
AttributeError: 'str' object has no attribute 'decode'
I:failed
I:exit status: 1
R:FAIL