In message , "Evan Hunt via RT" writes: > Mark, what python version were you using? I have 2.7.12 and 3.5.2 and > the test passes for me in both of them. [rock:~/git/bind9] marka% python --version Python 3.5.4 [rock:~/git/bind9] marka% -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: marka@isc.org