How to run Test::Unit tests in parallel on GitHub Actions to fix slow tests and get faster CI builds

Run Test::Unit tests in parallel on GitHub Actions in the optimal way and avoid bottleneck parallel jobs.

Without Knapsack Pro

you have to wait 20 minutes for slow Test::Unit tests running too long on the red GitHub Actions node

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Run fast parallel GitHub Actions build with Knapsack Pro

GitHub Actions build completes work in only 10 minutes because Knapsack Pro ensures all parallel nodes finish work at a similar time

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You can even run 20 parallel nodes to complete your GitHub Actions build in 2 minutes

How it works

Knapsack Pro in Queue Mode splits tests in a dynamic way across parallel GitHub Actions nodes to ensure each GitHub Actions node finishes work at a similar time. Thanks to that, your CI build time is as fast as possible. It works with many supported CI servers.

Diagram that shows files distributed to 3 parallel CI nodes

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GitHub Actions parallelism integration for Test::Unit

Start using Knapsack Pro with Test::Unit on GitHub Actions

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Speed up Test::Unit tests run your 1 hour Ruby test suite in 2 minutes with the optimal parallelisation on GitHub Actions