```ruby
require 'simplecov'
require 'simplecov-html'

SimpleCov.formatter = SimpleCov::Formatter::MultiFormatter[
  SimpleCov::Formatter::HTMLFormatter
]
SimpleCov.start 'rails'

require 'agnostic_backend'
require 'agnostic_backend/rspec/matchers'

RSpec.configure do |config|
  config.include AgnosticBackend::RSpec::Matchers
end
```

Change simplecov Rails setting to default
user
```ruby
require 'simplecov'
require 'simplecov-html'

SimpleCov.formatter = SimpleCov::Formatter::MultiFormatter[
  SimpleCov::Formatter::HTMLFormatter
]
SimpleCov.start

require 'agnostic_backend'
require 'agnostic_backend/rspec/matchers'

RSpec.configure do |config|
  config.include AgnosticBackend::RSpec::Matchers
end
```
assistant