Set of tests system design

I'm thinking of how to design some system and would really appreciate your advice/comments.

I have a set of validation tests. There are some simple tests and some more complex ones -

1. Simple - have a solid answer - OK/WARNING/FAILED and a string of explanation


2. Complex - have a solid answer but might have a very complex and long feedback. It basically consists of really minor tests which combine to the complex one

I would like to create a pipeline of such tests and somehow to make the answer & feedback to be generic and simple. Also - an easy way to calculate the final output of such tests.

Is there any design pattern that is good in this case?

Thanks in advance!