Improve test performance and messages when they fail

[DavyLandman]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.7%. Comparing base (9ecc427) to head (d01f47c).
⚠️ Report is 36 commits behind head on main.

Additional details and impacted files

@@ Coverage Diff @@## main #67 +/- ##
==========================================
+ Coverage 60.9% 79.7% +18.7% - Complexity 137 174 +37 
==========================================
Files 23 23 Lines 766 766 Branches 88 88 ==========================================
+ Hits 467 611 +144 + Misses 250 92 -158 - Partials 49 63 +14 

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