diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 6cbce40..07a68b4 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -33,3 +33,6 @@ jobs:
     - name: Test
       run: |
         TEST_FETCH_DATA=1 make test
+    - name: Test make library
+      run: |
+        cb_fetch_data library/DATA_SOURCES.yml