[...]
E         - optional arguments:
E         + options:
E             -h, --help            show this help message and exit
E             --version             show program's version number and exit
E
E           subcommands:
E             {help,list,birds,mammals}
E               help                print subcommand help
E               list                list subcommands
E               birds               {squawk} subcommand(s)
E               mammals             {meow, woof} subcommand(s)
[...]
FAILED tests/test_cli.py::test_call_help - assert ('usage: meow-cli [-h] 
[--v...
FAILED tests/test_cli.py::test_help - assert ('usage: vox-aggregator 
[-h] [--...

Looks like an update of a dependency (changing optional 
arguments->options) was not expected by the tests, if I guess correctly.
---
(I'm going through <https://ci.guix.gnu.org/eval/668365/dashboard> 
one-by-one, albeit not in the same order as listed there.)