diff --git a/.github/workflows/_sandbox.yaml b/.github/workflows/_sandbox.yaml
index 3b663627b..ca593aa89 100644
--- a/.github/workflows/_sandbox.yaml
+++ b/.github/workflows/_sandbox.yaml
@@ -7,5 +7,8 @@ on:
 jobs:
   ngc-release:
     uses: ./.github/workflows/ngc-release-testing.yaml
+    with:
+      JAX_IMAGE: nvcr.io/nvidian/trigger-jax-toolbox-actions:14090586-jax-py3
+      PAX_IMAGE: nvcr.io/nvidian/trigger-jax-toolbox-actions:14090586-pax-py3
     secrets: inherit
 
diff --git a/.github/workflows/ngc-release-testing.yaml b/.github/workflows/ngc-release-testing.yaml
index 016209f31..3a678bc5e 100644
--- a/.github/workflows/ngc-release-testing.yaml
+++ b/.github/workflows/ngc-release-testing.yaml
@@ -9,12 +9,12 @@ on:
         type: string
         description: "JAX image to run tests on"
         required: false
-        default: ''
+        default: 'nvcr.io/nvidian/trigger-jax-toolbox-actions:14090586-jax-py3'
       PAX_IMAGE:
         type: string
         description: "Rosetta Pax image to run tests on"
         required: false
-        default: ''
+        default: 'nvcr.io/nvidian/trigger-jax-toolbox-actions:14090586-pax-py3'
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}