pytest-xdist

The `pytest-xdist`_ plugin extends py.test with some unique test execution modes: * test run parallelization_: if you have multiple CPUs or hosts you can use those for a combined test run. This allows to speed up development or to use special resources of `remote machines`_. * ``--boxed``: (not available on Windows) run each test in a boxed_ subprocess to survive ``SEGFAULTS`` or otherwise dying processes * ``--looponfail``: run your tests repeatedly in a subprocess. After each run py.test waits until a file in your project changes and then re-runs the previously failing tests. This is repeated until all tests pass after which again a full run is performed. * `Multi-Platform`_ coverage: you can specify different Python interpreters or different platforms and run tests in parallel on all of them. Before running tests remotely, ``py.test`` efficiently "rsyncs" your program source code to the remote place. All test results are reported back and displayed to your local terminal. You may specify different Python versions and interpreters.