Trial and test spaces are sometimes mixed up
See for instance
https://i10git.cs.fau.de/terraneo/hyteg-form-generator/-/blob/master/generate_all_operators.py#L636
and
https://i10git.cs.fau.de/terraneo/hyteg-form-generator/-/blob/master/generate_all_operators.py#L538
but we need to check whether there are more similar issues.