diff --git a/modules/profile/files/pupmod/_github/workflows/pr_tests.yml b/modules/profile/files/pupmod/_github/workflows/pr_tests.yml
index 93d05dc..2ed06e8 100644
--- a/modules/profile/files/pupmod/_github/workflows/pr_tests.yml
+++ b/modules/profile/files/pupmod/_github/workflows/pr_tests.yml
@@ -84,6 +84,18 @@ jobs:
       - run: bundle exec rake check:dot_underscore
       - run: bundle exec rake check:test_file
 
+  reference:
+    name: 'REFERENCE.md freshness'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v5
+      - name: 'Install Ruby 2.7'
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: 2.7
+          bundler-cache: true
+      - run: bundle exec rake validate:strings
+
   releng-checks:
     name: 'RELENG checks'
     runs-on: ubuntu-latest