In Issue 13739, build 40145 classesInTheSelectedPackage in Nautilus was removed. What is the correct way to replace it? WABrowser uses a nautilus browser to show a web-based browser. (build 609, Seaside #'release3.1' pharo4, from ci) WABrowserTest>>testContentsNotifying | model | model := WABrowser browserClass new. model systemCategoryListIndex: (model systemCategoryList indexOf: 'Seaside-Tests-Pharo-Development'). model classListIndex: (model classList indexOf: #WABrowserTest). model messageCategoryListIndex: (model messageCategoryList indexOf: #'-- all --'). [ self assert: (model contents: 'sampleMethod ^ 1 + 1' notifying: self). self assert: message isNil ] ensure: [ WABrowserTest removeSelectorSilently: #sampleMethod ] Stephan