Clear the expired cache entries only: open "Maintenance: Clear Cache", press "Clear Expired Cache" and wait for Joomla's confirmation.
Examples
When I clear the expired cache
When we clear the expired cache
And I clear the expired cache
When clear the expired cache
And we clear the expired cache
Pattern
When(/^(I |we )*clear the expired cache$/, …)
Part of @webship-js/joomla-steps (github.com/webship/joomla-steps), a step pack for Webship-js 2.0.x.