...Interactive tests for validating layer composition must run for all graphics APIs supported by the runtime and action tests must run for all interaction profiles supported by the runtime. For this reason, the suite of tests is run multiple times with different configurations. conformance_cli, a command-line interface application, is provided for running on PCs and other devices and platforms which support this form of application. conformance_cli also demonstrates how to build an application that can interop with the conformance_test shared library. If the device being tested does not support a command-line interface, a host application must be built for the device that the OpenXR runtime will run on.