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[](https://ci.systemreboot.net/jobs/run64) [](https://ci.systemreboot.net/jobs/run64-website)
run64 is a [SRFI-64](https://srfi.schemers.org/srfi-64/srfi-64.html) runner. It generates pretty, readable, colorful output featuring clear diffs between expected and actual values. run64 is meant to work with a SRFI-64 implementation, and is not a SRFI-64 implementation in itself.
# Motivation
*TLDR:* pytest envy
When hacking on Guile projects, I found myself re-inventing auxiliary scripts to present test results. Meanwhile, in Python land, they have beautiful tooling like pytest. Schemers deserve good tooling too! So, here we are.
# Download
Download release tarballs.
- 2025-11-17 [run64-0.1.0.tar.lz](releases/run64-0.1.0.tar.lz) [GPG Signature](releases/run64-0.1.0.tar.lz.asc)
Download [public signing key](https://systemreboot.net/about/arunisaac.pub).
Browse the development version on [cgit](https://git.systemreboot.net/run64) or on [klaus](https://klaus.systemreboot.net/run64/).
# Usage
To use run64, invoke it on the command-line passing files containing SRFI-64 tests as arguments. For example,
``` shell
$ run64 test-file1.scm test-file2.scm
```
You might want to invoke the *run64* executable specific to your scheme implementation. For example, if you are using GNU Guile,
``` shell
$ guile-run64 test-file1.scm test-file2.scm
```
# Portability
run64 is written in portable R6RS Scheme. It should work in any R6RS Scheme that supports [SRFI-1](https://srfi.schemers.org/srfi-1/srfi-1.html), [SRFI-64](https://srfi.schemers.org/srfi-64/srfi-64.html) and pattern matching, but has been tested well only with [GNU Guile](https://www.gnu.org/software/guile/). If you use run64 with other Scheme implementations, we would love to hear of your experience.
# Contributing
Feedback, suggestions, feature requests, bug reports and patches are all welcome. Please write to <run64@systemreboot.net>.
# License
run64 is free software released under the terms of the [GNU General Public License](https://www.gnu.org/licenses/gpl.html), either version 3 of the License, or (at your option) any later version.
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