It's used only as a dev dependency in 7 crates.

Depender (with downloads and own rev deps) TestDir version
700 1 kismet-cache dev ^0.2
bkt dev ^0.2
fpipe dev ^0.2.0
graphfind-rs dev ^0.2
leo-lang dev ^0.2.0
icann-rdap-srv dev ^0.2.0
icann-rdap-cli dev ^0.2.0