database_cleaner is wiping my development database

I'd recommend changing

ENV["RAILS_ENV"] ||= 'test'

to

ENV["RAILS_ENV"] = 'test'

and remove

Rails.env = 'test'

as the RAILS_ENV environment variable should be sufficient for configuration

If anyone is looking for another potential source of this issue, I randomly had $DATABASE_URL defined in my .bashrc file to point directly to my development database. Took me a few hours to find that.