Use autoloading instead of an explicit require

qa/qa.rb

@@ -34,6 +34,10 @@ module QA
       module Project
         autoload :Create, 'qa/scenario/gitlab/project/create'
       end
+
+      module Sandbox
+        autoload :Prepare, 'qa/scenario/gitlab/sandbox/prepare'
+      end
     end
   end
 

qa/qa/scenario/gitlab/project/create.rb

 require 'securerandom'
-require_relative '../sandbox/prepare'
 
 module QA
   module Scenario