Macro streaming_conformance_suite 

macro_rules! streaming_conformance_suite {
    (
        provider: $family:literal,
        fixture: $fixture:expr,
        manifest: [$($cap:ident),* $(,)?]
        $(, xfail: [$($xfail:literal),* $(,)?])?
        $(,)?
    ) => { ... };
}

Available on crate feature test-utils and not (target_os=unknown and WebAssembly) only.