Factory fixtures should use parametrizations

[youtux]

Fix #223

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.60%. Comparing base (15cd119) to head (9ddedcb).

Additional details and impacted files

@@                     Coverage Diff                     @@
##           ab/fix-pytest8.4-compat     #234      +/-   ##
===========================================================
- Coverage                    97.76%   97.60%   -0.17%     
===========================================================
  Files                           14       15       +1     
  Lines                          852      878      +26     
  Branches                        51       53       +2     
===========================================================
+ Hits                           833      857      +24     
- Misses                           8        9       +1     
- Partials                        11       12       +1     

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