diff --git a/.github/workflows/ci-additional.yaml b/.github/workflows/ci-additional.yaml
index 323875aecc5..0b4e0f185c7 100644
--- a/.github/workflows/ci-additional.yaml
+++ b/.github/workflows/ci-additional.yaml
@@ -121,6 +121,7 @@ jobs:
   doctest:
     name: Doctests
     runs-on: "ubuntu-latest"
+    needs: detect-ci-trigger
     if: needs.detect-ci-trigger.outputs.triggered == 'false'
     defaults:
       run:
@@ -157,6 +158,7 @@ jobs:
   mypy:
     name: Mypy
     runs-on: "ubuntu-latest"
+    needs: detect-ci-trigger
     if: needs.detect-ci-trigger.outputs.triggered == 'false'
     defaults:
       run:
@@ -186,8 +188,13 @@ jobs:
           conda info -a
           conda list
           python xarray/util/print_versions.py
+      - name: Install mypy
+        run: |
+          python -m pip install mypy
+          python -m mypy --install-types --non-interactive
+
       - name: Run mypy
-        run: mypy
+        run: python -m mypy
 
   min-version-policy:
     name: Minimum Version Policy