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. WWW: https://github.com/pytest-dev/pytest-xdist