Rails fixtures - defining a table name?

You can set the class of a given fixture manually like so:

class SomeTest < ActiveSupport::TestCase

  set_fixture_class widgets: 'Module::ClassInAModule'
  fixtures :widgets # or fixtures :all if you’ve defined all the mappings required

  test 'widgets can be found' do
    assert Module::ClassInAModule.all.any?, 'there should be widgets'
  end

end

Depending on how your tests/test helpers are set up, you may want to move this call to a parent class or something.