You need the original discs that shipped with your MBP.
Versions of Apple Hardware Test designed for other Macs, such as your iMac, will not work.
Contact Apple to purchase a set of replacement discs for your MBP. There is no substitute for them.
You may attempt to load an Internet version of Apple Hardware Test by holding option d as you boot your Mac. Not all Macs support this method:
Computers that can be upgraded to use OS X Internet Recovery
Some computers that are upgraded can't use the Internet version of Apple Hardware Test:
If you are experiencing this issue, Apple Hardware Test is available on the media that came with your computer. See Intel-based Macs: Using Apple Hardware Test for more information.