Add a comment to the order ("Notes for this Order" on the Information tab) and wait for it to show in the list.
Examples
When I add the order comment "Checked by the test suite"
And I add the order comment "Customer called"
When we add the order comment "Waiting for stock"
When I add the order comment "Packed"
When add the order comment "Second note"
Pattern
When(/^(I |we )*add the order comment "([^"]*)"$/, …)
Part of @webship-js/magento-steps (github.com/webship/magento-steps), a step pack for Webship-js 2.0.x.