1 files changed, 5 insertions, 1 deletions
diff --git a/actionpack/test/abstract_unit.rb b/actionpack/test/abstract_unit.rb
index 0e394d28f1..7c9f15108d 100644
--- a/actionpack/test/abstract_unit.rb
+++ b/actionpack/test/abstract_unit.rb
@@ -100,7 +100,10 @@ end
 
 class ActionDispatch::IntegrationTest < ActiveSupport::TestCase
   def self.build_app(routes = nil)
-    RoutedRackApp.new(routes || ActionDispatch::Routing::RouteSet.new) do |middleware|
+    routes ||= ActionDispatch::Routing::RouteSet.new.tap { |rs|
+      rs.draw { }
+    }
+    RoutedRackApp.new(routes) do |middleware|
       middleware.use ActionDispatch::ShowExceptions, ActionDispatch::PublicExceptions.new("#{FIXTURE_LOAD_PATH}/public")
       middleware.use ActionDispatch::DebugExceptions
       middleware.use ActionDispatch::Callbacks
@@ -232,6 +235,7 @@ module ActionController
       routes = ActionDispatch::Routing::RouteSet.new
       routes.draw(&block)
       include routes.url_helpers
+      routes
     end
   end