Tiny improvement… Imagine a class where the class var TT is already set to 5. Object subclass: #TT slots: { } classVariables: { #TT } category: ‘PlayGround' now changing that to a special ClassVariable that saves its value not in the binding but somewhere else (like ExampleClassVariable), the value should be copied over on class modification: Object subclass: #TT slots: { } classVariables: { #TT => ExampleClassVariable } category: ‘PlayGround' this is now fixed with https://pharo.fogbugz.com/f/cases/15112/add-ClassVariableTest-and-a-fix-copy... - tests - when changing a class var to a new kind, make sure to copy the existing value over. Marcus