If you use transactional_fixtures or the database_cleaner gem Show archive.org snapshot with strategy :transaction, after_commit callbacks will not be fired in your tests.

Rails 5+

Rails 5 has a fix Show archive.org snapshot for this issue and no further action is needed.

Rails 3, Rails 4

Add the gem test_after_commit Show archive.org snapshot to your test group in the Gemfile and you are done. You don't need to change the database strategy to deletion (which might lead to longer test runs).

Note:

Most often a after_commit is the only right choice. Sending emails, performing async sidekiq workers and many things more are kind of broken with an after_save callback.

If you replace an after_save callback with an after_commit callback this list might help you to fix your code afterwards:

• attribute_changed? will return true in the after_save callback and false in the after_commit callback. Use something like previous_changes.key?(:attribute) instead.