Worked on the matplotlib/matplotlib repository to enhance test reliability and cross-architecture stability, focusing on Python-based testing infrastructure. Addressed a persistent issue with test flakiness on ARM64 platforms by updating platform checks in the test_zoom_inset_connector_styles function, ensuring that arm64 and aarch64 architectures were treated equivalently. This change involved modifying test tolerance logic in lib/matplotlib/tests/test_inset.py to align with actual platform.machine() results, which stabilized the test suite on ARM64 continuous integration environments. The work demonstrated proficiency in Python and debugging across architectures, contributing to more reliable CI feedback and a smoother release cadence for the project.