Updates: Cc: alexandre.bergel Comment #2 on issue 3185 by guillermopolito: BitmapStreamTests have errors http://code.google.com/p/pharo/issues/detail?id=3185 As we noticed, here are two problems: 1) SmartStreamRef>>nextPut: has already an instance variable that (as we supose) was removed while removing UniClasses) 2) After removing the line using that variable, we had another issue: The test is Saving an ImageSegment in a file, and then it is loading it using (FileDirectory default readOnlyFileNamed: externalSegmentFilename) fileInObjectAndCode which throws an Invalid UTF8 input detected (because it is assuming the file as a text file).