An Expensive Errand: Chasing 100% Mutation Coverage with an Agent Can Make Your Test Suite Worse
10/04/2026
Introduction. In this post, we walk through an experiment with AI-generated code and tests in order to explore the pitfalls of blindly using mutation testing to “improve” AI-generated test suites[1]. The code and tests generated by the coding agent. We used a coding agent[2] to generate the code of a...