Hi, a little story: while working on cleaning up MCMethodDefinitionTest (see https://pharo.fogbugz.com/f/cases/20830) I noticed that from time to time you have trouble when running the test methods in this class one after the other several times. So sometimes it worked and sometimes not. I wondered since the latest Pharo 7 build #70360 is definitely green on CI, so the tests seem to work. After investigating I've noticed that in MCMethodDefinitionTest>>tearDown a package "FooBarBaz" which is used during the tests is unregistered and (when you run another test from this suite right afterwards) is not found anymore. Because in the test initialization it is not. This is easily fixed with setting the package up in the #setUp method which is unregistered in #tearDown and one can easily run the tests several times independently. So if one had trouble in Pharo 6 and Pharo 7 with sporadic fails in Monticello tests this might have been the cause. The fix is part of PR https://github.com/pharo-project/pharo/pull/583 Bye T.