diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7f0ecc4..9a334f4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,43 +10,58 @@ on:
 
 jobs:
   pytest:
+    strategy:
+      matrix:
+        python-version: [3.8, 3.9, 3.10, 3.11]
+        
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - name: Set up Python 3.9
+      - name: Check out code
+        uses: actions/checkout@v3
+        
+      - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v4
         with:
-          python-version: 3.9
+          python-version: ${{ matrix.python-version }}
+          
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
           pip install -r requirements.txt
           pip install pytest
+          
       - name: Test with pytest
         run: pytest -vv
+        
   test-deploy:
-    runs-on: ubuntu-latest  
     environment:
       name: test_release
       url: https://test.pypi.org/p/pysand
     permissions:
       contents: read
       id-token: write
+    
+    runs-on: ubuntu-latest  
     steps:
-      - uses: actions/checkout@v3
-      - name: Set up Python
+      - name: "Check out code"
+        uses: actions/checkout@v3
+      
+      - name: "Set up Python"
         uses: actions/setup-python@v4
         with:          
           python-version: 3.9
+      
       - name: "Installs dependencies"            
         run: |
           python -m pip install --upgrade pip              
           python -m pip install setuptools wheel twine
+      
       - name: "Build distribution"
         run: |
           python setup.py sdist bdist_wheel
           twine check dist/*
-      - name: Publish package distributions to PyPI Test
+          
+      - name: "Publish package distributions to PyPI Test"
         uses: pypa/gh-action-pypi-publish@release/v1
         with:
           repository-url: https://test.pypi.org/legacy/