Not super crucial since there's only the one test, but "order-500", "0987654321", "123.45" are all expectations in later tests, so you might want to keep them as instance variables in your `setup` and use them instead
```ruby
def setup
  @orderRef = 'order-500'
   ...

def test_basic_helper_fields
  assert_field 'orderRef', @orderRef
```