diff --git a/.github/workflows/pytest.yaml b/.github/workflows/pytest.yaml
index cced8e16b..dcd37190e 100644
--- a/.github/workflows/pytest.yaml
+++ b/.github/workflows/pytest.yaml
@@ -119,6 +119,10 @@ jobs:
 
         pip install .[docs,tests] ${{ matrix.upstream.extra-deps }}
 
+        # TEMPORARY With Python 3.13 pyam-iamc resolves to 1.3.1, which in turn
+        # limits pint < 0.17. Override.
+        pip install --upgrade pint
+
     - name: Configure local data path
       run: |
         mkdir -p message-local-data/cache