Rails unit test fixtures using environment variables throw MySQL error-Collection of common programming errors

Take for example the following test fixture:

  name: MyString

Throws the following error when executing the tests:

Mysql2::Error: Unknown column 'adapter' in 'field list':

However, I can load fixtures into the DB manually with no problems.

Using Rails 3.2.11 and Ruby 1.9.2.

Rails bug or am I doing something wrong?


  1. Try running rake db:test:prepare before executing the tests – it seems you have added that field later to the development db, but not yet to the test db.

Originally posted 2013-11-09 19:44:13.