diff --git a/.github/workflows/run_tests.yml b/.github/workflows/run_tests.yml
index aba3c1b5..b47bb643 100644
--- a/.github/workflows/run_tests.yml
+++ b/.github/workflows/run_tests.yml
@@ -21,6 +21,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-13]
         version: ["3.9", "3.12"]
+    defaults:
       run:
         shell: bash -l {0}