You are going on the right track, It's important to test skills of any candidate as a screening mechanism before you start spending time with them. As a Hiring Manager, you have a lot more important things to do rather than spending time with irrelevant candidates.
So it would be good if you ask your recruiters to test job specific technical skills of the candidates. Here you need to keep a few things in mind:
An invalid unreliable pre-hiring test can land an employer in legal trouble, whereas the right skill test created by experts would save you a lot of billable hours of your team.
Why don't you try Interview Mocha! It is a pre-employment skill testing solution, with a robust testing platform and 1000+ ready skill tests (created by experts) for all latest technologies. Moreover, you can ask for any custom test you need for a particular job description, Their support team will provide you with the skill/aptitude test for your specific job profile. You can use a free trial to test up to 10 candidates , before buyin a subscription. Hope it helps!