diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index d65f49e7..92728a16 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -23,36 +23,30 @@ jobs:
           path: .
           fetch-depth: 0  # avoid shallow clone with no tags
 
-      - name: initialize miniconda
-        # this uses a marketplace action that sets up miniconda in a way that makes
-        # it easier to use.  I tried setting it up without this and it was a pain
-        uses: conda-incubator/setup-miniconda@v2
-        with:
-          activate-environment: test
-          # environment.yml file is needed by this action.  Because I don't want
-          # maintain this but rather maintain the requirements files it just has
-          # basic things in it like conda and pip
-          environment-file: ./environment.yml
-          python-version: 3
-          auto-activate-base: false
+      - name: Install Mamba
+        run: |
+          wget "https://github.com/conda-forge/miniforge/releases/latest/download/Mambaforge-Linux-x86_64.sh" -O mambaforge.sh
+          bash mambaforge.sh -b -p $HOME/mambaforge
+          echo "$HOME/mambaforge/bin" >> $GITHUB_PATH
+          source $HOME/mambaforge/etc/profile.d/conda.sh
+          conda init bash
+
+      - name: Create conda environment
+        run: |
+          source $HOME/mambaforge/etc/profile.d/conda.sh
+          conda create -n test_env python=3.12 xonsh regolith -c conda-forge -y
+          conda activate test_env
+          pip install case_insensitive_dict
 
-      - name: install diffpy.pdfgui requirements
-        shell: bash -l {0}
+      - name: Install dependencies
         run: |
-          conda config --set always_yes yes --set changeps1 no
-          conda config --add channels conda-forge
-          conda activate test
-          conda install --file requirements/run.txt
-          conda install --file requirements/test.txt
-          pip install .
+          source $HOME/mambaforge/etc/profile.d/conda.sh
+          conda activate test_env
+          mamba install --file requirements/run.txt
+          mamba install --file requirements/test.txt
 
       - name: Use Xvfb Action
         uses: GabrielBB/xvfb-action@v1
         with:
-          shell: bash -l {0}
           run: |
-            conda init
-            conda activate test
-            coverage run -m pytest -vv -s
-            coverage report -m
-            codecov
+            bash -c "source $HOME/mambaforge/etc/profile.d/conda.sh && conda activate test_env && pytest --maxfail=5 --disable-warnings -v"