Apparently there are a few gems that are not supported by Heroku, like `sqlite3`. If herokuish detects these, it will fail the test and abort. Since we aren't deploying to Heroku, this behavior is undesirable. ``` ! Failed to install gems via Bundler. ! Detected sqlite3 gem which is not supported on Heroku: ! https://devcenter.heroku.com/articles/sqlite3 ``` Note that this gem does require the `sqlite3` package to be installed locally, and it's not present on the herokuish image.