diff --git a/spec/integration/rack_attack_cache_spec.rb b/spec/integration/rack_attack_cache_spec.rb
index 98f5568..6f7b55c 100644
--- a/spec/integration/rack_attack_cache_spec.rb
+++ b/spec/integration/rack_attack_cache_spec.rb
@@ -16,23 +16,18 @@ describe Rack::Attack::Cache do
   end
 
   require 'active_support/cache/dalli_store'
-  require 'active_support/cache/mem_cache_store'
   require 'active_support/cache/redis_store'
-  require 'active_support/cache/redis_cache_store' if ActiveSupport.version.to_s.to_f >= 5.2
   require 'connection_pool'
 
   cache_stores = [
     ActiveSupport::Cache::MemoryStore.new,
     ActiveSupport::Cache::DalliStore.new("127.0.0.1"),
     ActiveSupport::Cache::RedisStore.new("127.0.0.1"),
-    ActiveSupport::Cache::MemCacheStore.new("127.0.0.1"),
     Dalli::Client.new,
     ConnectionPool.new { Dalli::Client.new },
     Redis::Store.new
   ]
 
-  cache_stores << ActiveSupport::Cache::RedisCacheStore.new if defined?(ActiveSupport::Cache::RedisCacheStore)
-
   cache_stores.each do |store|
     store = Rack::Attack::StoreProxy.build(store)