diff --git a/.github/workflows/run-acceptance-tests.yml b/.github/workflows/run-acceptance-tests.yml
index e32a8cc..d603e32 100644
--- a/.github/workflows/run-acceptance-tests.yml
+++ b/.github/workflows/run-acceptance-tests.yml
@@ -75,8 +75,8 @@ jobs:
       id: setup
       shell: bash
       run: |
-        echo 'JSON={"FOO": "BAR", "FOO": "BAZ"}' >> "GITHUB_OUTPUT"
-    
+        echo 'JSON={"FOO": "BAR", "FOO": "BAZ"}' >> "$GITHUB_OUTPUT"
+
     - name: Testing duplicate JSON key behavior
       shell: bash
       run: |