Use require_relative in tooling test

spec/fast_spec_helper.rb

@@ -13,6 +13,5 @@ require 'active_support/all'
 
 ActiveSupport::Dependencies.autoload_paths << 'lib'
 ActiveSupport::Dependencies.autoload_paths << 'ee/lib'
-ActiveSupport::Dependencies.autoload_paths << 'tooling/lib'
 
 ActiveSupport::XmlMini.backend = 'Nokogiri'

spec/tooling/lib/tooling/test_file_finder_spec.rb

 # frozen_string_literal: true
 
-require 'fast_spec_helper'
+require_relative '../../../../tooling/lib/tooling/test_file_finder'
 
-describe Tooling::TestFileFinder do
+RSpec.describe Tooling::TestFileFinder do
   subject { Tooling::TestFileFinder.new(file) }
 
   describe '#test_files' do