Fix test warning about deprecated cache format in Rails 7.1

test/rails_app/config/application.rb

@@ -53,5 +53,9 @@ module RailsApp
     if Devise::Test.rails70?
       config.active_record.legacy_connection_handling = false
     end
+
+    if Devise::Test.rails70_and_up?
+      config.active_support.cache_format_version = 7.0
+    end
   end
 end

test/rails_app/config/boot.rb

@@ -12,6 +12,10 @@ module Devise
       !rails70? && Rails::VERSION::MAJOR >= 7
     end
 
+    def self.rails70_and_up?
+      Rails::VERSION::MAJOR >= 7
+    end
+
     def self.rails70?
       Rails.version.start_with? '7.0'
     end