Gem::LoadError: Specified 'sqlite3' for database adapter, but the gem is not loaded

Question

I\'m trying to push my app to heroku but am getting this message.

Gem::LoadError: Specified \'sqlite3\' for database adaptor, but the gem is not loaded.
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Answer 1

In test environment you not have specific DB gem. Move 'pg' gem from production and development to common.