diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
index 95e4c530e..67d6f1b29 100644
--- a/.github/workflows/run-tests.yml
+++ b/.github/workflows/run-tests.yml
@@ -8,7 +8,7 @@ jobs:
     strategy:
       matrix:
         os: [macos-latest, ubuntu-latest, windows-latest]
-        python-version: [3.5, 3.6, 3.7, 3.8]
+        python-version: [3.5, 3.6, 3.7, 3.8, 3.9]
     env:
       CODACY_PROJECT_TOKEN: ${{ secrets.CODACY_PROJECT_TOKEN }}