diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 15996ee7e..e537569d2 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -95,6 +95,15 @@ jobs:
       - name: Verify sparse checkout
         run: __test__/verify-sparse-checkout.sh
 
+      # Disabled sparse checkout in existing checkout
+      - name: Disabled sparse checkout
+        uses: ./
+        with:
+          path: sparse-checkout
+
+      - name: Verify disabled sparse checkout
+        run: set -x && test -f src/git-command-manager.ts
+
       # Sparse checkout (non-cone mode)
       - name: Sparse checkout (non-cone mode)
         uses: ./