diff --git a/actionpack/test/dispatch/ssl_test.rb b/actionpack/test/dispatch/ssl_test.rb
index 0278ec12b4..2989039c2d 100644
--- a/actionpack/test/dispatch/ssl_test.rb
+++ b/actionpack/test/dispatch/ssl_test.rb
@@ -222,7 +222,7 @@ class SecureCookiesTest < SSLTest
   end
 
   def test_keeps_original_headers_behavior
-    get headers: { "Connection" => %w[close] }
+    get headers: { "Connection" => "close" }
     assert_equal "close", response.headers["Connection"]
   end
 end