units: revert some unintended changes

[ManuelHu]

introduced in #162

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 70.08%. Comparing base (6907a82) to head (30eff43).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #170      +/-   ##
==========================================
+ Coverage   70.04%   70.08%   +0.04%     
==========================================
  Files          33       33              
  Lines        2634     2631       -3     
==========================================
- Hits         1845     1844       -1     
+ Misses        789      787       -2     

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