CHORE: improve maxwell tests code cov

[gmalinve]

Description

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Issue linked

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Checklist

• I have tested my changes locally.
• I have added necessary documentation or updated existing documentation.
• I have followed the coding style guidelines of this project.
• I have added appropriate tests (unit, integration, system).
• I have reviewed my changes before submitting this pull request.
• I have linked the issue or issues that are solved by the PR if any.
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[codecov]

Codecov Report

Attention: Patch coverage is 84.61538% with 6 lines in your changes missing coverage. Please review.

Project coverage is 84.76%. Comparing base (01b93eb) to head (d859f2b).
Report is 1 commits behind head on main.

❌ Your patch status has failed because the patch coverage (84.61%) is below the target coverage (85.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5746      +/-   ##
==========================================
- Coverage   84.76%   84.76%   -0.01%     
==========================================
  Files         157      157              
  Lines       61614    61634      +20     
==========================================
+ Hits        52230    52241      +11     
- Misses       9384     9393       +9