TST: Ramp diagnostic

[braingram]

Resolves JP-nnnn
Resolves RCAL-nnnn

Closes #

This PR addresses ...

Checklist

• added entry in CHANGES.rst (either in Bug Fixes or Changes to API)
• updated relevant tests
• updated relevant documentation
• updated relevant milestone(s)
• added relevant label(s)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 10.67%. Comparing base (af5aefb) to head (23e2896).
Report is 5 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #257       +/-   ##
===========================================
- Coverage   85.18%   10.67%   -74.51%     
===========================================
  Files          35       32        -3     
  Lines        6797     6847       +50     
===========================================
- Hits         5790      731     -5059     
- Misses       1007     6116     +5109     

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