Fix inconsistent test

[mfosterw]

I made a brittle and difficult to understand test, so I fixed it by adding a branch and a bit more checking

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (dfa19e6) to head (9b9fc62).
⚠️ Report is 5 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##            master      #308   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           49        49           
  Lines         2021      2023    +2     
=========================================
+ Hits          2021      2023    +2     

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