diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
index 206b36c..5fea4c0 100644
--- a/.github/workflows/run-tests.yml
+++ b/.github/workflows/run-tests.yml
@@ -21,6 +21,7 @@ jobs:
 
       - uses: actions/setup-python@v2
         with:
+          python-version: "${{ matrix.python-version }}"
           cache: pip
           cache-dependency-path: |
             requirements.txt