diff --git a/spec/acceptance/throttling_spec.rb b/spec/acceptance/throttling_spec.rb
index e157f50..2ad4605 100644
--- a/spec/acceptance/throttling_spec.rb
+++ b/spec/acceptance/throttling_spec.rb
@@ -16,6 +16,8 @@ describe "#throttle" do
     get "/", {}, "REMOTE_ADDR" => "1.2.3.4"
 
     assert_equal 429, last_response.status
+    assert_equal "60", last_response.headers["Retry-After"]
+    assert_equal "Retry later\n", last_response.body
 
     get "/", {}, "REMOTE_ADDR" => "5.6.7.8"