You have to update dependencies that depend on bytecode, like ASM, bytebuddy or aspectj. Those deps upgrades in 99% cases don't break the library that uses them

You have to update dependencies that depend on bytecode, like ASM, bytebuddy or aspectj. Those deps upgrades in 99% cases don't break the library that uses them. I upgraded to JDK 21 on the day of release and haven't had issues with mockito (or spring, hibernate, junit, etc.)