pytest-xdist is a pytest plugin for distributed and parallel test execution; none of the candidate sources name it directly. The closest matches are pytest itself, which hosts its plugin ecosystem 1, and tox, which runs tests across environments 3. Playwright provides parallel test execution for browser tests 6.

1. 1

   pytestpytest.orgverified and signed

   pytest is the Python test framework whose plugins, including the parallel-execution plugin pytest-xdist, extend its test runs 111.

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   +22 community tools built for it

   for agents: test · unittest

2. 2

   toxtox.wikiverified and signed

   tox runs tests in each of multiple virtual environments with the test tool of choice, which can complement parallel pytest runs 313.

   WebsiteDocs

   for agents: virtual · testing · environments

3. 3

   Playwright Testplaywright.devwebsite read, tools not yet checked

   Playwright Test is a test runner offering parallelism across browsers, useful when the parallel tests are end-to-end browser tests rather than Python unit tests 6.

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   official:SDK · playwright+230 community tools built for it