diff --git a/lib/cops/unscoped.rb b/lib/cops/unscoped.rb
index 2cbfe5f98..f3933a4e0 100644
--- a/lib/cops/unscoped.rb
+++ b/lib/cops/unscoped.rb
@@ -1,4 +1,4 @@
-if ENV["RAILS_ENV"] == "development"
+if defined?(RuboCop)
   module RuboCop
     module Cop
       module DS