How do I tell my boyfriend I want to get tested together?

Ive been thinking about it all week and I’m actually concerned only because we’ve been off and on for nearly 3 years and we did branch off and meet new people sexually and I know I don’t trust the women in the area of the city he lives in and its just this big thing on my mind and I don’t know how to ask him without him feeling insulted or suspicious of my sexual health etc. I dont know, I also dont want to feel like the situation is toxic because i’m scared to ask in the first place

If you’re open to share your body with him then you should be willing to share this simple and responsible question. Health is wealth.