Hi Does anybody know/use? TestSuite>>addDependentToHierachy: anObject self addDependent: anObject. self tests do: [ :each | each addDependentToHierachy: anObject] TestSuite>>removeDependentFromHierachy: anObject self removeDependent: anObject. self tests do: [ :each | each removeDependentFromHierachy: anObject] I wonder if this is just something in Pharo. Stef