pypa/pip — pull request #1761 by dstufft (2014-04-26 02:52:19+00:00)
Title: Parallelize running tests on PyPy with pytest-xdist

We've had a number of problems with pytest-xdist, primarily on Python 3.x where we had intermittent failure. However we're also getting intermittent failures on Travis on PyPy due to how long the tests actually take to run. Given two different intermittent failures it seems that the one that runs faster should be preferred.