Any one having idea that how can we cover the rootstock community object trigger classes

I have a work order (rstk__wocst__c) which is a rootstock community object and as per the best practice I have covered the WorkOrderTriggerHander class  83%  

but it has not covered my trigger. which is shown "Your code coverage is 0%. You need at least 75% coverage to complete this deployment."

does anyone knows how to cover this rootstock object trigger.?  

Thank you