test: ensure assertions are reachable in test/es-module

[aduh95]

Another followup of #60125

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.58%. Comparing base (bdf03bf) to head (fd970e9).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #60501      +/-   ##
==========================================
+ Coverage   88.05%   88.58%   +0.52%     
==========================================
  Files         704      704              
  Lines      207857   207857              
  Branches    39964    40053      +89     
==========================================
+ Hits       183030   184126    +1096     
+ Misses      16806    15766    -1040     
+ Partials     8021     7965      -56     

see 102 files with indirect coverage changes

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