chore: refactor tests

[tripodsan]

refactor tests to make use of the fixture directory and not just the file names.

[codecov[bot]]

Codecov Report

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

Project coverage is 100.00%. Comparing base (379796e) to head (915083f). Report is 11 commits behind head on 5.x.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## 5.x #753 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 50 50 Lines 4480 4480 ========================================= Hits 4480 4480 ```

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[github-actions[bot]]

This PR will trigger a patch release when merged.

[github-actions[bot]]

:tada: This PR is included in version 5.13.10 :tada:

The release is available on:

• npm package (@release-5.x dist-tag)
• GitHub release

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