Heroku rejecting push in mature application (pre-receive hook declined)

Question

I\'m getting

   FAILED: http://devcenter.heroku.com/articles/bundler

! Heroku push rejected, failed to install gems via Bundler To git@hero

Answer 1

I was getting the same error, and running the following code in the command line solved it:

$ heroku config:set BUNDLE_WITHOUT="development:test"

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I think the gemfile.lock issues described above are red herrings.