Take a test case like tst_QRhi::storageBufferRuntimeSizeGraphics that exercise storage buffer objects. This is available with OpenGL 4.3 and OpenGL ES 3.1. But not OpenGL 4.2. Which is what the OpenGL Compatibility Pack for Windows on ARM provides. (guessing from runs in virtual machines - the web site only seems to mention OpenGL 3.3 in fact?)

It would need something like
if (!rhi->isFeatureSupported(QRhi::StorageBuffers))

But there is no way to test for this with isFeatureSupported() at the moment. This means that the test cannot skip, and so it fails in obscure ways due to the qsb package only containing GLSL 430 shader, and while when running with 4.2 context we only look for up to GLSL 420, naturally.

Same goes for image load/store, that is only in OpenGL 4.2 (GLSL 420), not earlier.