Rakefile in usable-1.2.0 vs Rakefile in usable-1.2.1

@@ -1,6 +1,10 @@
 require "bundler/gem_tasks"
 require 'rspec/core/rake_task'
-require 'rspec/scaffold'
+begin
+  require 'rspec/scaffold'
+rescue LoadError
+  nil
+end
 
 RSpec::Core::RakeTask.new(:spec)
 task default: :spec