Small refactor to filtering tests

[sfmig]

Description

What does this PR do? Removed an unnecessary long fixture and made names of variables a bit more explicit.

The reason is I got confused while reviewing it, but it may be me so happy to hear thoughts.

Checklist:

• [x] The code has been tested locally
• [ n/a ] Tests have been added to cover all new functionality
• [ n/a ] The documentation has been updated to reflect any changes
• [x] The code has been formatted with pre-commit

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 99.77%. Comparing base (3df12a9) to head (89f6edb). Report is 2 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #287 +/- ## ======================================= Coverage 99.77% 99.77% ======================================= Files 14 14 Lines 883 883 ======================================= Hits 881 881 Misses 2 2 ```

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[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud