diff --git a/.github/workflows/runE2ETest.yml b/.github/workflows/runE2ETest.yml
index ad86f681..e126c8b2 100644
--- a/.github/workflows/runE2ETest.yml
+++ b/.github/workflows/runE2ETest.yml
@@ -23,7 +23,7 @@ on:
       os:
         description: "Operating System(s) to run the E2E tests on"
         required: false
-        default: "[macos-latest, ubuntu-latest, windows-latest]"
+        default: '["macos-latest", "ubuntu-latest", "windows-latest"]'
         type: string
 
 jobs: