diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 649dc35e..429ab651 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -28,4 +28,4 @@ jobs:
     uses: ./.github/workflows/run.yml
     needs: [discover]
     with:
-      earthfiles: ${{ fromJson(needs.discover.outputs.result)['^check.*'] }}
+      earthfiles: "${{ fromJson(needs.discover.outputs.result)['^check.*'] }}"