For testing with not installed python modules, invoking setup.py commands are often preferable and addresses both PYTHONPATH and 2to3.
For nosetests: Use "python setup.py nosetests" instead. For pytest: Use "python setup.py pytest" instead. Note that "python-pytest-runner" needs to be in checkdepends. There are additional common hacks if the tests need to invoke an entry points or requires the versioned distribution object. Either: 1) Installing it in a temporary place and hack PYTHONPATH/PATH. 2) Create a sitecustomize.py and add the build dir to site. (See python2-faulthandler for an example) And finally if above still didn't solve it, you may choose to skip the problematic part of the tests or use "heavier" workarounds like a venv. -- Regards, Felix Yan
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