diff --git a/README.md b/README.md
index 94cc107..7b17260 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@ Python library for generating and parsing [IIIF Image API](http://iiif.io/api/im
 object-oriented, pythonic fashion.
 
 [![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.13308491.svg)](https://doi.org/10.5281/zenodo.13308491)
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+[![unit tests](https://github.com/Princeton-CDH/piffle/actions/workflows/unit-tests.yml/badge.svg)](https://github.com/Princeton-CDH/piffle/actions/workflows/unit-tests.yml)
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