|| Test class                              || Batching 1 || Batching 2 || Batching 3
-------------------------------------------------------------------------------------
|| WebTest_ACL_AssignUsersToRolesTest      || OK         || OK         || OK
|| WebTest_Activity_ContactContextAddTest  || Fail       || OK         || OK
|| WebTest_Activity_IcalTest               || Fail       || Fail       || Fail
   (adnauseum)
----

In this format, we make some observations:

AssignUsersToRolesTest always passes. It's probably working.

IcalTest always fails. It's probably broken.

ContactContextAddTest is inconsistent -- there's probably a flawed assumption causing an interaction with another test.