Prakhar Goyal developed a robustness test for Fortran internal subroutine input variable visibility in the lfortran repository, focusing on improving the reliability of variable handling within nested subroutines. Using Fortran and leveraging skills in software development and testing, Prakhar implemented a new subroutine and accompanying test to ensure input variables are correctly passed and accessible in complex internal routine scenarios. The work addressed a regression related to intent(in) variable assignments, consolidating the fix and expanded test coverage into a single pull request. This contribution enhanced the maintainability and correctness of internal routine logic, reducing the risk of edge-case failures.