Be less strict with testfunction tests

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (4ae0741) 91.52% compared to head (d639dc3) 91.52%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #458 +/- ## ======================================= Coverage 91.52% 91.52% ======================================= Files 162 162 Lines 21738 21738 ======================================= Hits 19896 19896 Misses 1842 1842 ```

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