Cargo Features

deterministic-bloom has no features set by default.

[dependencies]
deterministic-bloom = { version = "0.1.0", features = ["test_utils"] }
test_utils = proptest

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

proptest test_utils?