[Zope-dev] How to test changes to ZTK packages?

I should know this, but I don't. What is the recommended way to test changes to core ZTK packages to mitigate the risk that changes affect other packages? Is there a page somewhere with instructions? I tried using using zope.release. Building the trunk of zope.release with Python 2.4 and running the tests gives lots of test import errors and test failures. (Lots of tests want to import z3c.pt.) The tests hang when I try to build and run with Python 2.6. BTW, zope.release wants lxml, which is a real pain on Mac OS X and Centos 4. Does the ZTK really need to depend on lxml? Jim -- Jim Fulton Zope Corporation