diff --git a/.gitea/workflows/009_matrix.yaml b/.gitea/workflows/009_matrix.yaml
new file mode 100644
index 0000000..7b1bde2
--- /dev/null
+++ b/.gitea/workflows/009_matrix.yaml
@@ -0,0 +1,29 @@
+name: Matrix 
+
+on:
+  workflow_dispatch:
+    
+jobs:
+  run-tests:
+    strategy:
+      fail-fast: true
+      matrix:
+        os: [ubuntu-20.04, ubuntu-22.04]
+        python-version: ['3.8', '3.10']
+    runs-on: ${{ matrix.os }}
+    steps:
+      - name: Checkout source code 
+        uses: actions/checkout@v4
+
+      - name: Install Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: "${{ matrix.python-version }}"
+
+      - name: Install tox
+        run: pip install tox
+        
+      - name: Run unit tests
+        run: |
+          cd backend
+          tox -e unit
\ No newline at end of file