All acceptance tests on an Extreme Programming project must be automated.
On an Extreme Programming project, a manual test may be worse than no test at all.
Manual tests are unreliable.
Manual tests undermine the XP testing practice.
Manual tests are divisive.
An Extreme Programming project with manual acceptance tests is like an airplane with a "Wings Fall Off " button.
If, having mastered acceptance test automation, you have an excellent reason for a manual test, it must be repeatable, with recorded results that can be viewed the same way as the automated test results.
