/usr/lib/python2.7/dist-packages/tables/nodes/tests/test_filenode.dat is in python-tables 3.1.1-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/tables/nodes/tests/../../../../../../share/python-tables/nodes/tests/test_filenode.dat