/usr/lib/python2.7/dist-packages/optlang/tests/ is in python-optlang 1.3.0-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.7/dist-packages/optlang/tests/__init__.py
/usr/lib/python2.7/dist-packages/optlang/tests/abstract_test_cases.py
/usr/lib/python2.7/dist-packages/optlang/tests/data/
/usr/lib/python2.7/dist-packages/optlang/tests/data/__init__.py
/usr/lib/python2.7/dist-packages/optlang/tests/data/parse_the_final_netlib_results.py
/usr/lib/python2.7/dist-packages/optlang/tests/test_change_solver.py
/usr/lib/python2.7/dist-packages/optlang/tests/test_container.py
/usr/lib/python2.7/dist-packages/optlang/tests/test_cplex_interface.py
/usr/lib/python2.7/dist-packages/optlang/tests/test_duality.py
/usr/lib/python2.7/dist-packages/optlang/tests/test_elements.py
/usr/lib/python2.7/dist-packages/optlang/tests/test_expression_parsing.py
/usr/lib/python2.7/dist-packages/optlang/tests/test_glpk_exact_interface.py
/usr/lib/python2.7/dist-packages/optlang/tests/test_glpk_interface.py
/usr/lib/python2.7/dist-packages/optlang/tests/test_gurobi_interface.py
/usr/lib/python2.7/dist-packages/optlang/tests/test_inspyred_interface.py
/usr/lib/python2.7/dist-packages/optlang/tests/test_interface.py
/usr/lib/python2.7/dist-packages/optlang/tests/test_io.py
/usr/lib/python2.7/dist-packages/optlang/tests/test_netlib_cplex_interface.py
/usr/lib/python2.7/dist-packages/optlang/tests/test_netlib_glpk_exact_interface.py
/usr/lib/python2.7/dist-packages/optlang/tests/test_netlib_glpk_interface.py
/usr/lib/python2.7/dist-packages/optlang/tests/test_netlib_gurobi_interface.py
/usr/lib/python2.7/dist-packages/optlang/tests/test_scipy_interface.py
/usr/lib/python2.7/dist-packages/optlang/tests/test_symbolics.py
/usr/lib/python2.7/dist-packages/optlang/tests/test_util.py