How do I pass hex characters to printf in a script command?

How do I get printf to output hex characters when run from a script? Suppose I am at the prompt and type **printf "\x41\x42"** the output I get AB% However if I have a script containing that line i.e. cat test.sh produces printf "\x41\x42" But executing the script **./test.sh** produces \x41\x42% How do I get the script to produce the same results as from the shell prompt?