$ nosetests -v distributions/tests/test_models.py
....
distributions.tests.test_models.test_mixture_runs('lp.models.dpd',) ... Segmentation fault
$ uname -a
Linux desk 3.13.0-43-generic #72-Ubuntu SMP Mon Dec 8 19:35:06 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux