Improve coverage test (add uncovered lines)

[aaronabramov]

No description provided.

[codecov-io]

Codecov Report

Merging #3509 into master will decrease coverage by 0.02%.
The diff coverage is 42.85%.

@@            Coverage Diff             @@
##           master    #3509      +/-   ##
==========================================
- Coverage   62.28%   62.25%   -0.03%     
==========================================
  Files         181      181              
  Lines        6700     6706       +6     
  Branches        5        6       +1     
==========================================
+ Hits         4173     4175       +2     
- Misses       2525     2528       +3     
- Partials        2        3       +1

Impacted Files	Coverage Δ
...ntegration_tests/coverage_report/sum_dependency.js	0% <0%> (ø)	⬆️
integration_tests/coverage_report/sum.js	85.71% <75%> (-14.29%)	⬇️

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[github-actions]

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