diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index f2ecdfe79a3..6db1177c855 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -150,6 +150,7 @@ jobs:
       id: cpu-cores
     - name: Clean dotnet folder for space
       run: rm -Rf /usr/share/dotnet
+    - run: python -m pip install pillow tifffile
     - name: Planemo test
       uses: galaxyproject/planemo-ci-action@v1
       id: test
diff --git a/.github/workflows/pr.yaml b/.github/workflows/pr.yaml
index eccab2f5c9b..f2e13b5fcca 100644
--- a/.github/workflows/pr.yaml
+++ b/.github/workflows/pr.yaml
@@ -290,6 +290,7 @@ jobs:
       id: cpu-cores
     - name: Clean dotnet folder for space
       run: rm -Rf /usr/share/dotnet
+    - run: python -m pip install pillow tifffile
     - name: Planemo test
       uses: galaxyproject/planemo-ci-action@v1
       id: test