validations running twice from rake:integration

I'm working on upgrading my app to the 1-2-pre-release branch and am noticing that when I run rake test:integration my model validations are running twice.

I can tell this because when I output errors, I get the same validation messages twice. When I run the same test classes not via rake (e.g. "ruby test/integration/sometest.rb"), they pass and validation errors only appear once.

Any ideas what might be causing this?

Cheers from NYC, Luke

Solved my own problem. It turned out to be caused by a separate integration test was errantly "require"-ing my model file. -Luke