Jair Henrique modernized the test suite for the newrelic/newrelic-python-agent repository by removing the external mock dependency and migrating all tests to use Python’s built-in unittest.mock module. This work focused on dependency management and testing, streamlining the project’s setup and aligning it with standard Python practices. By updating the test code to use unittest.mock.patch where appropriate, Jair reduced maintenance overhead and improved the reliability of continuous integration workflows. The changes also simplified onboarding for new contributors by ensuring a consistent and reproducible test environment. This feature demonstrated thoughtful application of Python and testing best practices within a focused project scope.