diff --git a/.github/workflows/gem_acceptance.yml b/.github/workflows/gem_acceptance.yml
index ab915fb..5a7ac54 100644
--- a/.github/workflows/gem_acceptance.yml
+++ b/.github/workflows/gem_acceptance.yml
@@ -25,6 +25,9 @@ on:
         default: "ubuntu-latest"
         type: "string"
 
+# ENABLE PUPPETCORE.  The calling workflow must:
+# - Set a valid PUPPET_FORGE_TOKEN secret on its repository.
+# - Set ruby_version >= 3.1 to override this workflow's default 2.7; otherwise bundle install will fail.
 jobs:
   acceptance:
     name: "acceptance"
@@ -32,6 +35,8 @@ jobs:
 
     env:
       PUPPET_GEM_VERSION: ${{ inputs.puppet_version }}
+      PUPPET_FORGE_TOKEN: ${{ secrets.PUPPET_FORGE_TOKEN || secrets.PUPPET_FORGE_TOKEN_PUBLIC }}
+      BUNDLE_RUBYGEMS___PUPPETCORE__PUPPET__COM: "forge-key:${{ secrets.PUPPET_FORGE_TOKEN || secrets.PUPPET_FORGE_TOKEN_PUBLIC }}"
 
     steps: