Not that easy! A valid technical test needs to be custom made for the position and project (or type of project) you hire for and takes a while to both prepare and “grade”. It also then helps in giving you something very specific to talk about at the interview (I always find something to talk about when reviewing the code they submit for the test).

It still won’t have a 100% success rate, the best you can do is hire people you/someone you trust in the team have worked with before and know is good.