It's used only as a dev dependency in 5 crates.

Depender (with downloads and own rev deps) ArbTest version
20K 15 whatlang dev ^0.2
900 prelate-rs dev ^0.2.0
550 1 loro-internal dev ^0.2.0
360 1 simuldb dev ^0.2.0
crdt-richtext dev ^0.2.0