Relax tests for upcoming MOI release

[odow]

Upcoming will throw SetAttributeNowAllowed instead of a random error.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.86%. Comparing base (4f6d613) to head (24ee3e1).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff             @@
##            master    #4082      +/-   ##
===========================================
- Coverage   100.00%   99.86%   -0.14%     
===========================================
  Files           43       43              
  Lines         6210     5910     -300     
===========================================
- Hits          6210     5902     -308     
- Misses           0        8       +8     

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