Meta Reports 4x Higher Bug Detection with Just-in-Time Testing



Posted on Fri Apr 17 2026 | 8:19 pm


Meta introduces Just-in-Time (JiT) testing, a dynamic approach that generates tests during code review instead of relying on static test suites. The system improves bug detection by ~4x in AI-assisted development using LLMs, mutation testing, and intent-aware workflows like Dodgy Diff. It reflects a shift toward change-aware, AI-driven software testing in agentic development environments




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