Virtual Wayland Display Server Possible?

Are there any equivalents to X11's Xvfb for Wayland? So wayland applications can run with OpenGL etc without having to connect to a physical graphics card? --- Asking since I would like to run tests for graphical applications that can run on a headless server for example. Note: while it's technically possible to run wayland within a virtual X11 session, I'd rather not depend on this for my testing framework if possible.