diff --git a/.github/workflows/apple.yml b/.github/workflows/apple.yml
index 8ca2f4e..69b4683 100644
--- a/.github/workflows/apple.yml
+++ b/.github/workflows/apple.yml
@@ -21,6 +21,7 @@ jobs:
         python-version: ["3.10", "3.11", "3.12", "3.13"]
 
     env:
+      MPLBACKEND: Agg  # https://github.com/orgs/community/discussions/26434
       PYTHONPATH: /Users/runner/work/physicelldataloader/physicelldataloader
 
     steps:
@@ -33,7 +34,7 @@ jobs:
       run: |
         brew install ffmpeg imagemagick
         python -m pip install --upgrade pip
-        python -m pip install flake8 pytest anndata bioio matplotlib numpy pandas requests scipy vtk
+        python -m pip install flake8 pytest anndata bioio bioio-ome-tiff matplotlib neuroglancer numpy pandas requests scikit-image scipy vtk
         python -m pip install /Users/runner/work/physicelldataloader/physicelldataloader -v
         #if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
     - name: lint with flake8
diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index 1a01ad7..4884b40 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -21,6 +21,7 @@ jobs:
         python-version: ["3.10", "3.11", "3.12", "3.13"]
 
     env:
+      MPLBACKEND: Agg  # https://github.com/orgs/community/discussions/26434
       PYTHONPATH: /home/runner/work/physicelldataloader/physicelldataloader
 
     steps:
@@ -33,7 +34,7 @@ jobs:
       run: |
         sudo apt install ffmpeg imagemagick
         python -m pip install --upgrade pip
-        python -m pip install flake8 pytest anndata bioio matplotlib numpy pandas requests scipy vtk
+        python -m pip install flake8 pytest anndata bioio bioio-ome-tiff matplotlib neuroglancer numpy pandas requests scikit-image scipy vtk
         python -m pip install /home/runner/work/physicelldataloader/physicelldataloader -v
         #if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
     - name: lint with flake8
diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index 235e012..d114976 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -21,6 +21,7 @@ jobs:
         python-version: ["3.10", "3.11", "3.12", "3.13"]
 
     env:
+      MPLBACKEND: Agg  # https://github.com/orgs/community/discussions/26434
       PYTHONPATH: D:\a\physicelldataloader\physicelldataloader
 
     steps:
@@ -33,7 +34,7 @@ jobs:
       run: |
         choco install ffmpeg imagemagick
         python -m pip install --upgrade pip
-        python -m pip install flake8 pytest anndata bioio matplotlib numpy pandas requests scipy vtk
+        python -m pip install flake8 pytest anndata bioio bioio-ome-tiff matplotlib neuroglancer numpy pandas requests scikit-image scipy vtk
         python -m pip install D:\a\physicelldataloader\physicelldataloader -v
         #echo 'set PYTHONPATH=D:\a\physicelldataloader\physicelldataloader' >> $GITHUB_ENV
         #if [ -f requirements.txt ]; then pip install -r requirements.txt; fi