diff --git a/.github/workflows/test_pr.yml b/.github/workflows/test_pr.yml
index 4aa7b11..0c340ae 100644
--- a/.github/workflows/test_pr.yml
+++ b/.github/workflows/test_pr.yml
@@ -21,9 +21,9 @@ jobs:
           - ubuntu-latest
           - macos-latest
         python:
-          - 3.8
-          - 3.9
-          - 3.10
+          - "3.8"
+          - "3.9"
+          - "3.10"
 
     permissions:
       actions: write