diff --git a/actionpack/lib/action_dispatch/journey/formatter.rb b/actionpack/lib/action_dispatch/journey/formatter.rb
index d8bb10ffabcfd5a557022bb8452ee1aebe3c5399..c19ff0f4dbc09f4df9c04c4e3780bc3e1e83b74a 100644
--- a/actionpack/lib/action_dispatch/journey/formatter.rb
+++ b/actionpack/lib/action_dispatch/journey/formatter.rb
@@ -155,7 +155,7 @@ def possibles(cache, options, depth = 0)
 
         def build_cache
           root = { ___routes: [] }
-          routes.each_with_index do |route, i|
+          routes.routes.each_with_index do |route, i|
             leaf = route.required_defaults.inject(root) do |h, tuple|
               h[tuple] ||= {}
             end
diff --git a/actionpack/lib/action_dispatch/journey/routes.rb b/actionpack/lib/action_dispatch/journey/routes.rb
index dacb0ccf48acb55c3f7415ec4ce05daee4d88340..4770b8b7cc4a98f0ebfd2b661eabfef592bccde1 100644
--- a/actionpack/lib/action_dispatch/journey/routes.rb
+++ b/actionpack/lib/action_dispatch/journey/routes.rb
@@ -5,11 +5,10 @@ module Journey # :nodoc:
     class Routes # :nodoc:
       include Enumerable
 
-      attr_reader :routes, :named_routes, :custom_routes, :anchored_routes
+      attr_reader :routes, :custom_routes, :anchored_routes
 
       def initialize
         @routes             = []
-        @named_routes       = {}
         @ast                = nil
         @anchored_routes    = []
         @custom_routes      = []
@@ -37,7 +36,6 @@ def clear
         routes.clear
         anchored_routes.clear
         custom_routes.clear
-        named_routes.clear
       end
 
       def partition_route(route)
@@ -72,7 +70,6 @@ def add_route(name, mapping)
 
         route.precedence = routes.length
         routes << route
-        named_routes[name] = route if name && !named_routes[name]
         partition_route(route)
         clear_cache!
         route
diff --git a/actionpack/lib/action_dispatch/routing/route_set.rb b/actionpack/lib/action_dispatch/routing/route_set.rb
index 4f698c84ab130d9d13651cd836e3d56e8d90dead..30e308119d505c25f80c763d4a6fb21c8beaba73 100644
--- a/actionpack/lib/action_dispatch/routing/route_set.rb
+++ b/actionpack/lib/action_dispatch/routing/route_set.rb
@@ -143,6 +143,7 @@ def get(name)
         end
 
         def key?(name)
+          return unless name
           routes.key? name.to_sym
         end
 
@@ -356,7 +357,7 @@ def initialize(config = DEFAULT_CONFIG)
 
         @set    = Journey::Routes.new
         @router = Journey::Router.new @set
-        @formatter = Journey::Formatter.new @set
+        @formatter = Journey::Formatter.new self
         @dispatcher_class = Routing::RouteSet::Dispatcher
       end
 
diff --git a/actionpack/test/journey/router_test.rb b/actionpack/test/journey/router_test.rb
index bddfbe7ef0a8867ceccd2d807961086e4a9f5427..8a1414de8eaef92969846382985f9fb56aae73c8 100644
--- a/actionpack/test/journey/router_test.rb
+++ b/actionpack/test/journey/router_test.rb
@@ -8,9 +8,10 @@ class TestRouter < ActiveSupport::TestCase
 
       def setup
         @app       = Routing::RouteSet::Dispatcher.new({})
-        @routes    = Routes.new
-        @router    = Router.new(@routes)
-        @formatter = Formatter.new(@routes)
+        @route_set  = ActionDispatch::Routing::RouteSet.new
+        @routes = @route_set.router.routes
+        @router = @route_set.router
+        @formatter = @route_set.formatter
       end
 
       class FakeRequestFeeler < ActionDispatch::Request
@@ -184,8 +185,8 @@ def test_only_required_parts_are_verified
 
       def test_knows_what_parts_are_missing_from_named_route
         route_name = "gorby_thunderhorse"
-        path = Path::Pattern.build("/foo/:id", { :id => /\d+/ }, ['/', '.', '?'], false)
-        add_route nil, path, {}, [], {}, route_name
+        mapper = ActionDispatch::Routing::Mapper.new @route_set
+        mapper.get "/foo/:id", :as => route_name, :id => /\d+/, :to => "foo#bar"
 
         error = assert_raises(ActionController::UrlGenerationError) do
           @formatter.generate(route_name, { }, { })
diff --git a/actionpack/test/journey/routes_test.rb b/actionpack/test/journey/routes_test.rb
index 01566f01487ecaa2882afd72fb015cecef7bfb31..bbe3228bf2b2e3fbf9238f91b37fbd2e592d38b8 100644
--- a/actionpack/test/journey/routes_test.rb
+++ b/actionpack/test/journey/routes_test.rb
@@ -6,7 +6,9 @@ class TestRoutes < ActiveSupport::TestCase
       attr_reader :routes
 
       def setup
-        @routes = Routes.new
+        @route_set  = ActionDispatch::Routing::RouteSet.new
+        @routes = @route_set.router.routes
+        @router = @route_set.router
         super
       end
 
@@ -64,13 +66,11 @@ def test_partition_route
       end
 
       def test_first_name_wins
-        one   = Path::Pattern.from_string '/hello'
-        two   = Path::Pattern.from_string '/aaron'
-
-        add_route nil, one, {}, [], {}, 'aaron'
-        add_route nil, two, {}, [], {}, 'aaron'
-
-        assert_equal '/hello', routes.named_routes['aaron'].path.spec.to_s
+        mapper = ActionDispatch::Routing::Mapper.new @route_set
+        mapper.get "/hello", to: "foo#bar", as: 'aaron'
+        assert_raise(ArgumentError) do
+          mapper.get "/aaron", to: "foo#bar", as: 'aaron'
+        end
       end
     end
   end