Address notices reported by latest PHPUnit

[acelaya]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.92%. Comparing base (f42957f) to head (6e81557).
⚠️ Report is 3 commits behind head on develop.

Additional details and impacted files

@@            Coverage Diff             @@
##             develop     #258   +/-   ##
==========================================
  Coverage      97.92%   97.92%           
  Complexity       318      318           
==========================================
  Files             96       96           
  Lines            866      866           
==========================================
  Hits             848      848           
  Misses            18       18           

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