diff --git a/spec/dummy/app/controllers/pages_controller.rb b/spec/dummy/app/controllers/pages_controller.rb
index 704f561..3d15192 100644
--- a/spec/dummy/app/controllers/pages_controller.rb
+++ b/spec/dummy/app/controllers/pages_controller.rb
@@ -4,12 +4,16 @@ class PagesController < ApplicationController
   helper Katalyst::Content::FrontendHelper
 
   def show
-    render locals: { page: }
+    render locals: { page:, version: page.published_version }
+  end
+
+  def preview
+    render :show, locals: { page:, version: page.draft_version }
   end
 
   private
 
   def page
-    @page ||= Page.find_by!(slug: params[:slug])
+    @page ||= Page.find_by!(slug: params[:slug] || params[:page_slug])
   end
 end
diff --git a/spec/dummy/app/views/pages/show.html.erb b/spec/dummy/app/views/pages/show.html.erb
index a01cf29..5a13b25 100644
--- a/spec/dummy/app/views/pages/show.html.erb
+++ b/spec/dummy/app/views/pages/show.html.erb
@@ -2,4 +2,4 @@
 
 <h1><%= page.title %></h1>
 
-<%= render_content page.published_version %>
+<%= render_content version %>
diff --git a/spec/dummy/config/routes.rb b/spec/dummy/config/routes.rb
index 526a249..d876276 100644
--- a/spec/dummy/config/routes.rb
+++ b/spec/dummy/config/routes.rb
@@ -7,7 +7,9 @@
     resources :pages
   end
 
-  resources :pages, param: :slug, only: :show, path: ""
+  resources :pages, param: :slug, only: :show, path: "" do
+    get "preview"
+  end
 
   resolve("Page") { |page| page_path(page.slug) }