diff --git a/lib/faraday/adapter.rb b/lib/faraday/adapter.rb
index f654e0358..39bb5fae1 100644
--- a/lib/faraday/adapter.rb
+++ b/lib/faraday/adapter.rb
@@ -98,3 +98,5 @@ def request_timeout(type, options)
     }.freeze
   end
 end
+
+require 'faraday/adapter/test'