After a long session with uninstalling the mishmash of Visual Studio 2005 Team Suite atop Visual Studio 2005 Team Edition for Software Developers, and some quality time in the Registry, \Program Files and AppData, I finally got back to a state where I was running just Visual Studio 2005 Team Edition for Team Developers. I can now say with conviction that the ability to create test lists as required by Team Foundation Server Build to perform unit testing does not exist in Team Developer.

(In case you're wondering why I care, I wrote this post way early this morning and never bothered to check if the Test|Create New Test List... option existed in Team Developer before installing the 180-day trial of Team Suite.)