Passive-Aggressive coworker is the project manager over our area of our ERP. Among other things she's responsible for our User Acceptance Testing. To me being responsible for a project means that you don't get to go to a work party if there is still testing to be done. You stay and help with the testing. To her apparently this means pawning most of the testing off on the one coworker who won't say boo about being stuck at the office when everyone else (including PA Coworker) goes to the work party. Completely unacceptable.