diff --git a/spec/acceptance/stores/active_support_redis_store_spec.rb b/spec/acceptance/stores/active_support_redis_store_spec.rb
index 75e4d68d..a5322118 100644
--- a/spec/acceptance/stores/active_support_redis_store_spec.rb
+++ b/spec/acceptance/stores/active_support_redis_store_spec.rb
@@ -5,6 +5,9 @@
 if defined?(::ActiveSupport::Cache::RedisStore)
   require_relative "../../support/cache_store_helper"
   require "timecop"
+  # redis-activesupport has some undeclared dependencies on ActiveSupport:
+  require "active_support/core_ext/object/blank"
+  require "active_support/core_ext/hash/keys"
 
   describe "ActiveSupport::Cache::RedisStore as a cache backend" do
     before do