Cargo test fails on big-endian 390x system

[cathay4t]

https://kojipkgs.fedoraproject.org//work/tasks/2133/103682133/build.log

test ctrl::nlas::tests::mcast_groups_parse ... FAILED
test ctrl::nlas::tests::mcast_groups_emit ... FAILED
test ctrl::nlas::tests::ops_emit ... FAILED
test ctrl::nlas::tests::ops_parse ... FAILED
failures:
---- ctrl::nlas::tests::mcast_groups_parse stdout ----
thread 'ctrl::nlas::tests::mcast_groups_parse' panicked at 'Failed to create NlaBuffer: DecodeError { inner: invalid NLA buffer
Caused by:
Decode error occurred: buffer has length: 24, but the NLA is 6144 bytes }', src/ctrl/nlas/mod.rs:192:14
note: run with RUST_BACKTRACE=1 environment variable to display a backtrace
---- ctrl::nlas::tests::mcast_groups_emit stdout ----
thread 'ctrl::nlas::tests::mcast_groups_emit' panicked at 'assertion failed: (left == right)
left: [52, 0, 7, 0, 24, 0, 1, 0, 8, 0, 2, 0, 7, 0, 0, 0, 11, 0, 1, 0, 103, 114, 111, 117, 112, 49, 0, 0, 24, 0, 2, 0, 8, 0, 2, 0, 8, 0, 0, 0, 11, 0, 1, 0, 103, 114, 111, 117, 112, 50, 0, 0],
right: [0, 52, 0, 7, 0, 24, 0, 1, 0, 8, 0, 2, 0, 0, 0, 7, 0, 11, 0, 1, 103, 114, 111, 117, 112, 49, 0, 0, 0, 24, 0, 2, 0, 8, 0, 2, 0, 0, 0, 8, 0, 11, 0, 1, 103, 114, 111, 117, 112, 50, 0, 0]', src/ctrl/nlas/mod.rs:239:9
---- ctrl::nlas::tests::ops_emit stdout ----
thread 'ctrl::nlas::tests::ops_emit' panicked at 'assertion failed: (left == right)
left: [44, 0, 6, 0, 20, 0, 1, 0, 8, 0, 1, 0, 1, 0, 0, 0, 8, 0, 2, 0, 11, 0, 0, 0, 20, 0, 2, 0, 8, 0, 1, 0, 3, 0, 0, 0, 8, 0, 2, 0, 33, 0, 0, 0],
right: [0, 44, 0, 6, 0, 20, 0, 1, 0, 8, 0, 1, 0, 0, 0, 1, 0, 8, 0, 2, 0, 0, 0, 11, 0, 20, 0, 2, 0, 8, 0, 1, 0, 0, 0, 3, 0, 8, 0, 2, 0, 0, 0, 33]', src/ctrl/nlas/mod.rs:294:9
---- ctrl::nlas::tests::ops_parse stdout ----
thread 'ctrl::nlas::tests::ops_parse' panicked at 'Failed to create NlaBuffer: DecodeError { inner: invalid NLA buffer