diff --git a/.github/workflows/test_and_deploy.yml b/.github/workflows/test_and_deploy.yml
index c8bc1c0..050e1d5 100644
--- a/.github/workflows/test_and_deploy.yml
+++ b/.github/workflows/test_and_deploy.yml
@@ -75,6 +75,7 @@ jobs:
 
       - name: Install dependencies including tox-conda
         if: matrix.tool == 'conda'
+        shell: bash -el {0}
         run: |
           python -m pip install --upgrade pip
           python -m pip install setuptools 'tox<4' tox-gh-actions tox-conda
@@ -82,6 +83,7 @@ jobs:
       - name: Test with tox
         uses: aganders3/headless-gui@v2
         with:
+          shell: bash -el {0}
           run: python -m tox -vv
         env:
           PYVISTA_OFF_SCREEN: True  # required for opengl on windows