When running all specs together (e.g. rake spec), with FLE enabled, two specs in the database_rake_spec.rb file fail with a cryptic error about the "encrypted" client not being defined.

This can be narrowed down to the following minimal case:

shell> FLE=helper rspec spec/integration/encryption_spec.rb spec/mongoid/clients/options_spec.rb spec/mongoid/tasks/database_rake_spec.rb

The error apparently happens because the encryption_spec.rb sets up an "encrypted" client, and then options_spec.rb clears all clients, but must be leaving something behind so that when database_rake_spec.rb runs, it gets confused and fails.

For now, this is worked around by using rake ci (which isolates the specs a bit better) instead of rake spec, but it would be better to clean up the specs eventually so that we don't leak side-effects like this.