While universal2 wheels can be built on x86_64, the arm64 part of the wheel cannot be tested on x86_64. Consider building universal2 wheels on an arm64 runner, if your CI provider offers this. Notably, an arm64 runner can also test the x86_64 part of the wheel, through Rosetta emulation. To silence this warning, set `CIBW_TEST_SKIP: "*-macosx_universal2:arm64"`.