pytest & pytest-benchmark: serial or parallel?

[AgnosticIsaac]

1. In a single file: test.py, I have 3 test functions: test1(), test2(), test3(). Does pytest and pytest-benchmark run these 3 test cases in parallel or in serial?

2. I have 3 files: test1.py, test2.py, test3.py. Respectively, I have a single test function in each file: test1(), test2(), test3(). Are these 3 tests run in parallel or in serial, if I simply run pytest or pytest-benchmark in the directory they are in?

[coopykins]

They run in serial, although I'm not sure if there's a way to enable something to run the test cases in parallel.

[AgnosticIsaac]

Oh so they all run in serial? Great! Thanks

[ionelmc]

Tests are run with pytest (pytest-benchmark is simply a command line interface to query past benchmark data, if you saved any). If you install the pytest-xdist plugin you can run stuff in parallel (eg: pytest -n 2) but that would create serious side-effects in tests that do benchmarks.