---
title: "Discussion on \"Rust: When Cargo Code Coverage Works Locally But Fails in CI\" | Hashnode"
description: "Discussion on \"Rust: When Cargo Code Coverage Works Locally But Fails in CI\". A short post to help if you run into the same issue.\nTLDR: If your code coverage reports show vastly different results between local development and CI, explicitly set --engine llvm in your cargo tarpaulin command.\nI recently ran into a frustration y..."
url: "https://hashnode.com/posts/rust-when-cargo-code-coverage-works-locally-but-fails-in-ci/685cfc2db497f1f632bfb155"
---

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# [Rust: When Cargo Code Coverage Works Locally But Fails in CI](https://hans.lhoest.eu/rust-when-cargo-code-coverage-works-locally-but-fails-in-ci?utm_source=hashnode&utm_medium=feed)

A short post to help if you run into the same issue. TLDR: If your code coverage reports show vastly different results between local development and CI, explicitly set --engine llvm in your cargo tarpaulin command. I recently ran into a frustration y...

Jun 26, 2025 · 2 min read · hans.lhoest.eu  
Updated Jun 27, 2025  
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## Written by

[Hans L'Hoest](https://hashnode.com/@hanlho)

@hanlho · The Hague, The Netherlands

  
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Riding the Architect elevator

I write about: Software architecture and engineering, Better software better. DDD, Scala and Rust

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