During April 2025, Braulio modernized the test suite for the cedarcode/mi_carrera repository by migrating all model tests from Minitest to RSpec, focusing on models such as Approvable, CreditsPrerequisite, LogicalPrerequisite, SubjectPrerequisite, CookieStudent, UserStudent, and User. This work involved carefully preserving existing test behavior while standardizing syntax and structure, resulting in a more maintainable and reliable test environment. By removing obsolete folders and unifying testing conventions, Braulio improved the foundation for future development. The project leveraged Ruby, Ruby on Rails, and TDD practices, enabling faster onboarding, easier refactoring, and more consistent test coverage across the codebase.