1 files changed, 14 insertions, 1 deletions
diff --git a/railties/test/application/url_generation_test.rb b/railties/test/application/url_generation_test.rb
index efbc853d7b..894e18cb39 100644
--- a/railties/test/application/url_generation_test.rb
+++ b/railties/test/application/url_generation_test.rb
@@ -15,7 +15,7 @@ module ApplicationTests
       require "action_view/railtie"
 
       class MyApp < Rails::Application
-        config.secret_key_base = "3b7cd727ee24e8444053437c36cc66c4"
+        secrets.secret_key_base = "3b7cd727ee24e8444053437c36cc66c4"
         config.session_store :cookie_store, key: "_myapp_session"
         config.active_support.deprecation = :log
         config.eager_load = false
@@ -42,5 +42,18 @@ module ApplicationTests
       get "/"
       assert_equal "/", last_response.body
     end
+
+    def test_routes_know_the_relative_root
+      boot_rails
+      require "rails"
+      require "action_controller/railtie"
+      require "action_view/railtie"
+
+      relative_url = '/hello'
+      ENV["RAILS_RELATIVE_URL_ROOT"] = relative_url
+      app = Class.new(Rails::Application)
+      assert_equal relative_url, app.routes.relative_url_root
+      ENV["RAILS_RELATIVE_URL_ROOT"] = nil
+    end
   end
 end