diff --git a/.github/workflows/os-tests.yml b/.github/workflows/os-tests.yml
index 1509740a..d03c2ffa 100644
--- a/.github/workflows/os-tests.yml
+++ b/.github/workflows/os-tests.yml
@@ -22,7 +22,7 @@ jobs:
       - name: Set up Python 3.10
         uses: actions/setup-python@v1
         with:
-          python-version: 3.10
+          python-version: '3.10'
           architecture: x64
 
       - name: install pyEpiabm