diff --git a/.github/workflows/release-test.yml b/.github/workflows/release-test.yml
index d1e536d47c..bbb8428e0b 100644
--- a/.github/workflows/release-test.yml
+++ b/.github/workflows/release-test.yml
@@ -97,10 +97,10 @@ jobs:
         path: RIOT
         fetch-depth: 1
         ref: ${{ github.event.inputs.riot_version }}
-    - name: Set up Python
+    - name: Set up Python 3.8
       uses: actions/setup-python@v2
       with:
-        python-version: 3.x
+        python-version: 3.8
     - name: Install Python dependencies
       run: |
         python -m pip install --upgrade pip