I need help for a dev test.

So the company that I work at is hiring a couple of new devs and they’ve put me in charge for test in order to see if the applicants are any good.
When I was hired there were no tests so I don’t have that many ideas for a good one.

Have you guys any good recommendations for a test or what it could consist of?

I’m thinking of having multiple small tests so if one misunderstands the task it’s not the whole test they fail. Would that be a good idea or not?

It’s for senior and junior web developer.

Any idea is greatly appreciated 😀