---
title: "Discussion on \"Testing Backwards-Compatible Additive Changes\" | Hashnode"
description: "Discussion on \"Testing Backwards-Compatible Additive Changes\". A field that looks optional can still break a client that parses its responses strictly."
url: "https://hashnode.com/posts/testing-backwards-compatible-additive-changes/6af711064d5fc3575e6b5c42"
---

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# [Testing Backwards-Compatible Additive Changes](https://blogs.powerduck.com/testing-backwards-compatible-additive-changes?utm_source=hashnode&utm_medium=feed)

A field that looks optional can still break a client that parses its responses strictly.

7h ago · 5 min read · blogs.powerduck.com  
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