diff --git a/.github/workflows/python_build.yml b/.github/workflows/python_build.yml
index 1da748b3a3..eb5c562da2 100644
--- a/.github/workflows/python_build.yml
+++ b/.github/workflows/python_build.yml
@@ -102,7 +102,10 @@ jobs:
           pip install virtualenv
           virtualenv venv
           source venv/bin/activate
-          make develop
+          make develop      
+              
+      - name: Download Data Acceptance Tests (DAT) files
+        run: make setup-dat
 
       - name: Run tests
         run: |