spec/cli/cli_spec.rb in sixword-0.3.5 vs spec/cli/cli_spec.rb in sixword-0.4.0

@@ -1,4 +1,6 @@
+require 'set'
+
 RSpec.describe Sixword::CLI do
 
   TestWarnings = Set.new
   def warn_once(label, message)
     unless TestWarnings.include?(label)