lest/rails — comment on commit 0afa8b826f7aad2bfab90bc2417bf33ff36331c8
File: railties/test/application/configuration_test.rb line 260
By lest:

It's because of post requests in tests, e.g. https://github.com/rails/rails/blob/master/railties/test/application/configuration_test.rb#L281