@gorgeous-alligator-94763 I started pulling out testdata structs in https://github.com/pantsbuild/pants/pull/5705/files#diff-90f1a2457726e7aaaab45299a7d486ad (example usage in https://github.com/pantsbuild/pants/pull/5705/files#diff-db925a83e648a68f6ac9b0b8d530cc06R705 ) - is that more clear than the whole `bytes()`/`digest()`/… convention? 🙂