diff --git a/spec/support/cookie_jar.rb b/spec/support/cookie_jar.rb
index e36ec66cc..64d684878 100644
--- a/spec/support/cookie_jar.rb
+++ b/spec/support/cookie_jar.rb
@@ -1,15 +1,10 @@
 # frozen_string_literal: true
 
 require 'uri'
-
-module Rack
-  class MockResponse
-    def cookie_jar
-      @cookie_jar ||= Array(headers[Rack::SET_COOKIE]).flat_map { |h| h.split("\n") }.map { |c| Cookie.new(c).to_h }
-    end
-
+module Spec
+  module Support
     # https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Set-Cookie
-    class Cookie
+    class CookieJar
       attr_reader :attributes
 
       def initialize(raw)
@@ -52,3 +47,11 @@ def parse_value(attribute, value)
     end
   end
 end
+
+module Rack
+  class MockResponse
+    def cookie_jar
+      @cookie_jar ||= Array(headers[Rack::SET_COOKIE]).flat_map { |h| h.split("\n") }.map { |c| Spec::Support::CookieJar.new(c).to_h }
+    end
+  end
+end