Make sure we return an empty list when no reviews

[gsmet]

I couldn't reproduce the problem described in #1768 but I thought we could add a test anyway as it doesn't cost us much.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.66%. Comparing base (2ee0bcc) to head (9bd83fb).
Report is 5 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1809      +/-   ##
============================================
- Coverage     80.69%   80.66%   -0.03%     
- Complexity     2332     2342      +10     
============================================
  Files           220      220              
  Lines          7050     7082      +32     
  Branches        373      379       +6     
============================================
+ Hits           5689     5713      +24     
- Misses         1128     1132       +4     
- Partials        233      237       +4     

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