diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 45db190..fc3039c 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -20,10 +20,41 @@ jobs:
       uses: actions/setup-python@v2
       with:
         python-version: ${{ matrix.python-version }}
+      #----------------------------------------------
+      #  -----  install & configure poetry  -----
+      #----------------------------------------------
+    - name: Install Poetry
+      uses: snok/install-poetry@v1
+      with:
+        virtualenvs-create: true
+        virtualenvs-in-project: true
+        installer-parallel: true
 
-    - name: Setup poetry
-      uses: abatilo/actions-poetry@v2.0.0
-  
-    - name: Test with pytest
-      run: poetry run pytest . -n 2
+      #----------------------------------------------
+      #       load cached venv if cache exists
+      #----------------------------------------------
+    - name: Load cached venv
+      id: cached-poetry-dependencies
+      uses: actions/cache@v2
+      with:
+        path: .venv
+        key: venv-${{ runner.os }}-${{ hashFiles('**/poetry.lock') }}
+      #----------------------------------------------
+      # install dependencies if cache does not exist
+      #----------------------------------------------
+    - name: Install dependencies
+      if: steps.cached-poetry-dependencies.outputs.cache-hit != 'true'
+      run: poetry install --no-interaction --no-root
+      #----------------------------------------------
+      # install your root project, if required
+      #----------------------------------------------
+    - name: Install library
+      run: poetry install --no-interaction
+      #----------------------------------------------
+      #              run test suite
+      #----------------------------------------------
+    - name: Run tests
+      run: |
+        source .venv/bin/activate
+        pytest tests/