Dear NEST users and developers, Pylint was recently updated to version 3, which changed the way in which pylintrc is discovered (https://github.com/pylint-dev/pylint/issues/8862). This seems to break pytest. So if “make installcheck” gives you the message Executing NEST's testsuite... Error: PyNEST testing requested, but 'pytest' cannot be run. Testing also requires the 'pytest-xdist' and 'pytest-timeout' extensions. And running pytest --version gives you a long error trace ending in ImportError: cannot import name 'PYLINTRC' from 'pylint.config' ... and pylint --version shows version 3.x.x, you need to downgrade to “pylint<3”. https://github.com/nest/nest-simulator/pull/2996 updates our environment file accordingly. Best, Hans Ekkehard -- Prof. Dr. Hans Ekkehard Plesser Department of Data Science Faculty of Science and Technology Norwegian University of Life Sciences PO Box 5003, 1432 Aas, Norway Phone +47 6723 1560 Email hans.ekkehard.plesser@nmbu.no<mailto:hans.ekkehard.plesser@nmbu.no> Home http://arken.nmbu.no/~plesser