Alan Bos developed robust testing support for Observation events in the micrometer-metrics/micrometer repository, focusing on enhancing the reliability of event-driven metrics testing. He implemented a feature that enables assertions on Observation events within the testing framework, allowing validation by event name or by a combination of name and contextual name. Using Java and leveraging his skills in observability and testing, Alan’s work addressed the challenge of reducing false positives and negatives in tests. This addition expanded the testing surface for Observations, laying the groundwork for more comprehensive observability validation in client metrics integrations and improving overall test accuracy.