---
title: "Discussion on \"cfn-lint E1020: catch CloudFormation reference errors early\" | Hashnode"
description: "Discussion on \"cfn-lint E1020: catch CloudFormation reference errors early\". Reproduce a broken Ref from two public commits, read the E1020 output, fix it, then add a review step on every pull request."
url: "https://hashnode.com/posts/cfn-lint-cloudformation-reference-errors/6af3329ad3c014bef0295e6b"
---

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# [cfn-lint E1020: catch CloudFormation reference errors early](https://cloudeval.hashnode.dev/cfn-lint-cloudformation-reference-errors?utm_source=hashnode&utm_medium=feed)

Reproduce a broken Ref from two public commits, read the E1020 output, fix it, then add a review step on every pull request.

2d ago · 8 min read · cloudeval.hashnode.dev  
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-   [#aws](https://hashnode.com/tag/aws)
-   [#cloudformation](https://hashnode.com/tag/cloudformation)
-   [#devops](https://hashnode.com/tag/devops)
-   [#ci-cd](https://hashnode.com/tag/ci-cd)
-   [#infrastructure-as-code](https://hashnode.com/tag/infrastructure-as-code)

## Written by

[Prateek Singh](https://hashnode.com/@prateekkumarsingh)

@prateekkumarsingh

  
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