``` util/spawn_background_ok: OK util/spawn_background_fail: FAIL test_util.c:1417: assert(stdout_buf == expected_out): <ERR: Failed to spawn background process - code 9/40000002 > vs <ERR: Failed to spawn background process - code 9/2 > [spawn_background_fail FAILED] util/spawn_background_partial_read: OK ``` ERRNO is not 2 everywhere.