Vttest is an application that is used to demonstrate features of VT100 and related terminals, or emulations thereof, such as xterm. The program was originally written in 1986 by Per Lindberg. It has been maintained and extended since 1996 by Thomas Dickey, to test and demonstrate features of xterm.
Perhaps prompted by the "scoresheet" presented by the developers of Kermit, some other developers of terminal emulators have asserted that their product achieves a given rating on the "VTTEST Score Card". However, no independent verification of any of those claims exists.