1 files changed, 17 insertions, 2 deletions
diff --git a/actionpack/lib/action_dispatch/system_test_case.rb b/actionpack/lib/action_dispatch/system_test_case.rb
index 29864c0f8e..4fda2cf44f 100644
--- a/actionpack/lib/action_dispatch/system_test_case.rb
+++ b/actionpack/lib/action_dispatch/system_test_case.rb
@@ -119,6 +119,17 @@ module ActionDispatch
     def initialize(*) # :nodoc:
       super
       self.class.driver.use
+      @proxy_route = if ActionDispatch.test_app
+        Class.new do
+          include ActionDispatch.test_app.routes.url_helpers
+
+          def url_options
+            default_url_options.merge(host: Capybara.app_host)
+          end
+        end.new
+      else
+        nil
+      end
     end
 
     def self.start_application # :nodoc:
@@ -159,8 +170,12 @@ module ActionDispatch
 
     driven_by :selenium
 
-    def url_options # :nodoc:
-      default_url_options.merge(host: Capybara.app_host)
+    def method_missing(method, *args, &block)
+      if @proxy_route.respond_to?(method)
+        @proxy_route.send(method, *args, &block)
+      else
+        super
+      end
     end
 
     ActiveSupport.run_load_hooks(:action_dispatch_system_test_case, self)