diff --git a/config.ru b/config.ru
index 3476455ef..d7295e476 100644
--- a/config.ru
+++ b/config.ru
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 # This file is used by Rack-based servers to start the application.
 
-require ::File.expand_path('../config/environment', __FILE__)
+require ::File.expand_path('config/environment', __dir__)
 run Rails.application
diff --git a/spec/rails_helper.rb b/spec/rails_helper.rb
index 02827a388..c197bc007 100644
--- a/spec/rails_helper.rb
+++ b/spec/rails_helper.rb
@@ -1,5 +1,5 @@
 ENV['RAILS_ENV'] ||= 'test'
-require File.expand_path('../../config/environment', __FILE__)
+require File.expand_path('../config/environment', __dir__)
 
 abort("The Rails environment is running in production mode!") if Rails.env.production?