diff --git a/actionpack/test/dispatch/cookies_test.rb b/actionpack/test/dispatch/cookies_test.rb
index f62e194ca9b41d155267ef10b7f6f29e28ba6eeb..7dc6c37522ced73e3fa0f8155178c4846865ed44 100644
--- a/actionpack/test/dispatch/cookies_test.rb
+++ b/actionpack/test/dispatch/cookies_test.rb
@@ -206,7 +206,7 @@ def noop
 
   def setup
     super
-    @request.env["action_dispatch.key_generator"] = ActiveSupport::KeyGenerator.new("b3c631c314c0bbca50c1b2843150fe33")
+    @request.env["action_dispatch.key_generator"] = ActiveSupport::KeyGenerator.new("b3c631c314c0bbca50c1b2843150fe33", iterations: 2)
     @request.env["action_dispatch.signed_cookie_salt"] = "b3c631c314c0bbca50c1b2843150fe33"
     @request.env["action_dispatch.encrypted_cookie_salt"] = "b3c631c314c0bbca50c1b2843150fe33"
     @request.env["action_dispatch.encrypted_signed_cookie_salt"] = "b3c631c314c0bbca50c1b2843150fe33"