Reduce Scaffold test file pollution

[Helveg]

Describe the work done

Attempt to reduce the amount of files produced by running the tests. Incomplete draft because waiting for #803

Tasks

• [ ] Added tests
• [ ] Updated documentation

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 99.00000% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 85.17%. Comparing base (83083a7) to head (ba5753d).

Files	Patch %	Lines
tests/test_util.py	66.66%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #810 +/- ## ========================================== + Coverage 84.65% 85.17% +0.51% ========================================== Files 107 104 -3 Lines 13545 13409 -136 ========================================== - Hits 11467 11421 -46 + Misses 2078 1988 -90 ```

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