/usr/share/pyshared/pymc/tests/ is in python-pymc 2.2+ds-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/pyshared/pymc/tests/__init__.py
/usr/share/pyshared/pymc/tests/objectmodel.py
/usr/share/pyshared/pymc/tests/test_AM.py
/usr/share/pyshared/pymc/tests/test_GP_MCMC.py
/usr/share/pyshared/pymc/tests/test_LazyFunction.py
/usr/share/pyshared/pymc/tests/test_MCMCSampler.py
/usr/share/pyshared/pymc/tests/test_adaptive.py
/usr/share/pyshared/pymc/tests/test_basiscov.py
/usr/share/pyshared/pymc/tests/test_binary_step.py
/usr/share/pyshared/pymc/tests/test_container.py
/usr/share/pyshared/pymc/tests/test_convergence.py
/usr/share/pyshared/pymc/tests/test_cov.py
/usr/share/pyshared/pymc/tests/test_database.py
/usr/share/pyshared/pymc/tests/test_distributions.py
/usr/share/pyshared/pymc/tests/test_gradients.py
/usr/share/pyshared/pymc/tests/test_graph.py
/usr/share/pyshared/pymc/tests/test_instantiation.py
/usr/share/pyshared/pymc/tests/test_interactive.py
/usr/share/pyshared/pymc/tests/test_mean.py
/usr/share/pyshared/pymc/tests/test_missing.py
/usr/share/pyshared/pymc/tests/test_norm_approx.py
/usr/share/pyshared/pymc/tests/test_observation.py
/usr/share/pyshared/pymc/tests/test_realization.py
/usr/share/pyshared/pymc/tests/test_special_methods.py
/usr/share/pyshared/pymc/tests/test_utils.py