Failing test case w/ environment other than 'test'

company_test.rb

require 'test_helper'

class CompanyTest < ActiveSupport::TestCase
  def test_save_logo
    fixtures_folder = Rails.root + 'test/fixtures/'
    test_image_path = File.expand_path 'test-image.png', fixtures_folder
    @test_image = File.open test_image_path, 'rb'

    company = Company.new(name: 'Logo test')
    company.logo = @test_image
    #company.save

    retrieved = Company.where(name: 'Logo test').first
    assert_not_nil retrieved.logo
    assert_equal 'test-image.png', retrieved.logo.original_filename
  end
end