The fact that the condom broke means you did have a risk. However, it seems as though it was brief, and your partner says that his most recent HIV test was negative. Those are both good for you. All in all, it's a risk and you should get tested, but I would not be very worried. The duration was small and your partner was probably not infected with HIV...which would have been required for you to have been exposed.
You can test at 4 weeks with a DUO test for conclusive tests. If that is unavailable in your area, a standard blood drawn HIV test will be 95% accurate at 4 weeks. It HAS to be blood drawn. The oral swabs are not conclusive until 12 weeks. There is some diagnostic value at 4 weeks, but not enough to consider it a final test. It is recommended to follow this(4 week antibody ONLY test) up at 12 weeks with a FINAL antibody test. This last one can be oral or instant.
Take a p24antigen test and a hiv 1/ hiv 2 antibody test after 28 days. And if both came negative itz conclusive i guess. Even if u just take the antibody test after 28 days it is 95 percent accurate