Where can I find the default printing test page?

For Ubuntu 12.04 the testpage is in the following location:

/usr/share/cups/data/default-testpage.pdf

These 2 are on our system:

/usr/share/system-config-printer/testpage-a4.ps
/usr/share/system-config-printer/testpage-letter.ps

Oh and looks like if you delete these the CUPS test page is used.