---
title: "Discussion on \"The AI test that passes because it copied the code's assumption\" | Hashnode"
description: "Discussion on \"The AI test that passes because it copied the code's assumption\". An agent writes the implementation and test in one pass, and the test repeats the assumption the code made. Wrong the same way, so green proves nothing. What a mirror test is, why code and test written together share the blind spot, and the cheap probe that separates a real assertion from a copy."
url: "https://hashnode.com/posts/ai-test-mirrors-code-instead-of-asserting/6adbc5830747f19137846606"
---

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# [The AI test that passes because it copied the code's assumption](https://blogs.powerduck.com/ai-test-mirrors-code-instead-of-asserting?utm_source=hashnode&utm_medium=feed)

An agent writes the implementation and test in one pass, and the test repeats the assumption the code made. Wrong the same way, so green proves nothing. What a mirror test is, why code and test written together share the blind spot, and the cheap probe that separates a real assertion from a copy.

Oct 23 · 4 min read · blogs.powerduck.com  
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