In a message of Fri, 07 Aug 2015 21:25:21 -0400, Terry Reedy writes: >was about this very test failure. The failure only occurred with tk >8.4. What tk version do you have? (Easily found, for instance, in Idle >-> Help -> About Idle. (python3 -m idlelib should start idle). > >-- >Terry Jan Reedy Tk version 8.6.4 Laura