Hi, In concrete this ones: IntegerTest>>#testIsPrime IntegerTest>>#testIsPrime2 IntegerTest>>#testIsProbablyPrime AlienSunit>>#testLong AlienSunit>>#testLongAccessors I suspect this is a common failure and not a Pharo specific issue (since nothing we change could remotely affect longs, I think) any idea? cheers, Esteban