```ruby
require 'factory_girl'
require 'coveralls'
require 'simplecov'

Coveralls.wear!('rails')
SimpleCov.formatters = [
  SimpleCov::Formatter::HTMLFormatter,
  Coveralls::SimpleCov::Formatter
]
SimpleCov.start 'rails'

RSpec.configure do |config|
  config.expect_with :rspec do |expectations|
    expectations.include_chain_clauses_in_custom_matcher_descriptions = true
  end

  config.mock_with :rspec do |mocks|
    mocks.verify_partial_doubles = true
  end
end

```

Migrate from `factory_girl` to `factory_bot`
user
```ruby
require 'factory_bot'
require 'coveralls'
require 'simplecov'

Coveralls.wear!('rails')
SimpleCov.formatters = [
  SimpleCov::Formatter::HTMLFormatter,
  Coveralls::SimpleCov::Formatter
]
SimpleCov.start 'rails'

RSpec.configure do |config|
  config.expect_with :rspec do |expectations|
    expectations.include_chain_clauses_in_custom_matcher_descriptions = true
  end

  config.mock_with :rspec do |mocks|
    mocks.verify_partial_doubles = true
  end
end

```
assistant