diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 4cf7a98..3845ed1 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [ 3.9, "3.10", "3.11" ]
+        python-version: [ "3.9", "3.10", "3.11" ]
 
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps: