1 files changed, 9 insertions, 0 deletions
diff --git a/actionpack/test/dispatch/request_test.rb b/actionpack/test/dispatch/request_test.rb
index 26386d2aa1..0edad72fd9 100644
--- a/actionpack/test/dispatch/request_test.rb
+++ b/actionpack/test/dispatch/request_test.rb
@@ -909,6 +909,15 @@ class RequestFormat < BaseRequestTest
       assert_equal [Mime[:html]], request.formats
     end
   end
+
+  test "formats from accept headers have higher precedence than path extension" do
+    request = stub_request 'HTTP_ACCEPT' => 'application/json',
+                           'PATH_INFO' => '/foo.xml'
+
+    assert_called(request, :parameters, times: 1, returns: {}) do
+      assert_equal [Mime[:json]], request.formats
+    end
+  end
 end
 
 class RequestMimeType < BaseRequestTest