diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
index 5805d143..02c709bd 100644
--- a/.github/workflows/run-tests.yml
+++ b/.github/workflows/run-tests.yml
@@ -31,7 +31,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.9", "3.10", "3.11", "3.12"]
         os: [ubuntu-latest, windows-latest, macos-latest, macos-13] # macos-13 is the latest version of macOS with Intel chip
     steps:
       - uses: actions/checkout@v4