How to perform strace on shell without changing your current shell?

I use strace to trace the behavior of a bash process. The purpose is to find out the order bash loads its configuration files. I am running the following command under zsh:

strace -e openat bash

After running this command, I end up in a new bash shell, but I don't want that to happen. Is there any way to trace the bash command without actually starting new bash interactive shell? I searched online but couldn't find anything. I was trying this with exec: strace -e openat "$(exec bash)" 2>&1, but still my shell changes to bash from zsh.