Study Finds 77% of Model-Generated Tests Wrongly Reject Correct Code

A Reddit experiment ran a standard test-and-fix coding agent pipeline with four small local GGUF models and fed the generated tests to a known-correct reference implementation, finding that about 77% of them wrongly rejected correct code, exposing a hidden reliability pitfall in agent pipelines.

2026-10-05 ~ 2026-10-05 · 2 related posts

• Model-written tests rejected a known-correct solution 77% of the time in agent pipeline test — deadatreides1 · 2026-10-05
• Small Models Write the Tests Too: 77% of Self-Written Test Suites Rejected Correct Code — deadatreides1 · 2026-10-05