diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 629e9ef..4acc7f6 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -177,8 +177,13 @@ jobs:
 
     steps:
     - uses: actions/checkout@v1
+    - name: Set up Python
+      uses: actions/setup-python@v1
+      with:
+        python-version: '3.x'
     - name: Install PlatformIO
       run: |
+        python -m pip install --upgrade pip
         pip install -U platformio
     - name: Build Arduino
       continue-on-error: true    # TODO