diff --git a/.github/workflows/mac.yml b/.github/workflows/mac.yml
index 27162254d..aaea4d160 100644
--- a/.github/workflows/mac.yml
+++ b/.github/workflows/mac.yml
@@ -11,6 +11,7 @@ jobs:
     - name: Brew install
       run: |
         brew install root boost cmake ninja
+        pip install pytest
     - name: Compile
       run: |
         mkdir build