Get rid of the last warning in the tests

[jesper-friis]

Description

Get rid of the last warning when running the tests.

Type of change

• [ ] Bug fix and code cleanup
• [ ] New feature
• [ ] Documentation update
• [x] Testing

Checklist for the reviewer

This checklist should be used as a help for the reviewer.

• [ ] Is the change limited to one issue?
• [ ] Does this PR close the issue?
• [ ] Is the code easy to read and understand?
• [ ] Do all new feature have an accompanying new test?
• [ ] Has the documentation been updated as necessary?
• [ ] Is the code properly tested?

[codecov[bot]]

Codecov Report

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

Project coverage is 78.41%. Comparing base (590eb5d) to head (8894ae4).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #226 +/- ## ======================================= Coverage 78.41% 78.41% ======================================= Files 18 18 Lines 1696 1696 ======================================= Hits 1330 1330 Misses 366 366 ```

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