diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 608b36f..656d021 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -49,6 +49,11 @@ jobs:
           -rA -vv --color=yes \
           --cov=iam_units --cov-report=xml
 
+    - name: Test update code
+      run: |
+        # Analogous to "python -m iam_units.update …"
+        coverage run -m iam_units.update emissions || exit 0
+
     - name: Upload test coverage to Codecov.io
       uses: codecov/codecov-action@v4
       with: