Thanks for the clues! At first glance, I'd say that the testing could be changed into #equals since the majority of date related tests are not focused into timezones - for instance, one of these tests is GlorpObjectMappedToImaginaryTableTest>>#testReadBackEntireExample which sends #assertEqual: to subclass of GlorpTestModelClasses. These #assertEqual: methods look like GlorpVideoCreditStatus>>#assertEqual: aCreditStatus self assert: customer name = aCreditStatus customer name. self assert: customer dateOfBirth = aCreditStatus customer dateOfBirth. self assert: balanceOwing = aCreditStatus balanceOwing. self assert: dateOwing = aCreditStatus dateOwing. self assert: comments = aCreditStatus comments. There might be some specific test on timezones, though, Glorp has a huge testing package. -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html