wip: run the formatter twice in tests

[SuperFola]

Description

Closes #459

Checklist

• [ ] I have read the Contributor guide
• [ ] My code follows the style guidelines of this project
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have updated the documentation if needed
• [ ] I have added tests that prove my fix/feature is working
• [ ] New and existing tests pass locally with my changes