Add a step somehwere
```
Given /^"([^"]*)" is hidden$/ do |selector|
  page.should have_selector(selector, visible: true)
end
```

or

```
Given /^"([^"]*)" is hidden$/ do |selector|
  find(:css, selector).should be_visible
end
```

If ignore_hidden_elements is on, it wont work and then possibly the fact that find(:css, selector) returned nothing would probably be an appropriate test.