Greetings, I've run across this in my own tests that ran fine in Squeak, but failed in Pharo. I thought it was just me being a dummy, but when I imported SandstoneDb and ran the tests, the exact same thing happens. It is a simple fix, but being fairly new at this, I'd like to know why this is, and if I should have to do this or not. So, for easy reference, I loaded the latest SandstoneDb (rjl.117) into my image (pharo1.0beta-10401web09.07.5) and ran the tests, several of which failed with a doesNotUnderstand: #assert:includes: Here is the test: testCollectionSerialization kid save. mom children: (OrderedCollection with: kid). mom save. self flushAndReload . self assert: mom refreshed children includes: kid refreshed if I simply put parens around the argument to assert: like this: assert: (mom refreshed children includes: kid refreshed) it passes. In all cases of failing tests with SandstoneDb, that is the case. Any insight here? Thanks! DZ