[Zope-dev] Tesing a module against against dependencies in different versions

Hi there, we maintain some modules that should work against different versions of dependent module. E.g. my z3c.sqlalchemy module should work with Sqlalchemy 0.3.X and zope.interface 3.0.X or SQLAlchemy >=0.4.X and zope.interface>=3.3.0 The codebase right works with both combinations. I am not sure how test such configurations automatically because the dependent modules and their versions are fixed within the setup.py. Is there some way together with Buildout, zope.testing & friends? Andreas -