diff --git a/.github/workflows/nifty_maria_ci.yml b/.github/workflows/nifty_maria_ci.yml
new file mode 100644
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+++ b/.github/workflows/nifty_maria_ci.yml
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+name: Test Nifty Maria
+
+on: 
+  push:
+  pull_request:
+
+jobs:
+  test-nifty-maria:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout maria
+        uses: actions/checkout@v4
+
+      - name: Checkout nifty_maria (inside CMB_denoising)
+        uses: actions/checkout@v4
+        with:
+          repository: jwuerzinger/CMB_denoising
+          path: CMB_denoising
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+
+      - name: Install pixi
+        run: |
+          cd CMB_denoising
+          curl -fsSL https://pixi.sh/install.sh | bash
+          echo "$HOME/.pixi/bin" >> $GITHUB_PATH
+
+      - name: Set up pixi test cpu no maria environment
+        run: |
+          cd CMB_denoising
+          pixi install -e test
+          pixi run -e test pip install torch --index-url https://download.pytorch.org/whl/cpu
+
+      - name: Install maria in pixi environment
+        run: |
+          cd CMB_denoising
+          pixi run -e test pip install -e ../
+
+      - name: Run tests with pixi
+        run: |
+          cd CMB_denoising/nifty_maria
+          pixi run -e test pytest -q
+
+      #- name: Run atmos mustang test
+      #  run: |
+      #    cd CMB_denoising/nifty_maria/steering
+      #    pixi run -e test python test_steering.py --config test --fit_atmos True --fit_map False
+
+      - name: Run map mustang test
+        run: |
+          cd CMB_denoising/nifty_maria/steering
+          pixi run -e test python test_steering.py --config test --fit_atmos False --fit_map True
+      
+      - name: Run both mustang atmos and map test
+        run: |
+          cd CMB_denoising/nifty_maria/steering
+          pixi run -e test python test_steering.py --config test --fit_atmos True --fit_map True
+      
+      #- name: Run atmos atlast test
+      #  run: |
+      #    cd CMB_denoising/nifty_maria/steering
+      #    pixi run -e test python test_steering.py --config test_atlast --fit_atmos True --fit_map False
+
+      #- name: Run map atlast test
+      #  run: |
+      #    cd CMB_denoising/nifty_maria/steering
+      #    pixi run -e test python test_steering.py --config test_atlast --fit_atmos False --fit_map True
+      
+      #- name: Run both atlast atmos and map test
+      #  run: |
+      #    cd CMB_denoising/nifty_maria/steering
+      #    pixi run -e test python test_steering.py --config test_atlast --fit_atmos True --fit_map True