Hi all, This is an FYI that in conda-forge, thanks to the hard work of @h-vetinari [1], the `scipy` package now no longer contains tests. Instead, those are split off into a new `scipy-tests` package which, when you install that, puts all the test files back inside the `scipy` package tree. The gain of that exercise was a ~30% size reduction, which seems worth it. We already had plans to do something similar in SciPy itself, by putting the heavy data files from the test suite under `scipy.datasets`. The gain of that will be less, probably 15-20% of the total size of wheels (excluding vendored openblas et al.). The conda-forge packages are a nice test case - if we receive no complaints from that, it should be pretty safe to move forward with that plan. Cheers, Ralf [1] https://github.com/conda-forge/scipy-feedstock/pull/184