Either
VK_KHR_portability_subset
.All tests can be tested with --gtest_filter=VkPortability*
The ./tests README explains how to use the VK_LAYER_KHRONOS_profiles
to test the Validation Layers
NOTE that for portability tests to make sure VK_KHR_portability_subset
is exposed from the VVL Test Driver
export VK_KHRONOS_PROFILES_EMULATE_PORTABILITY=false