Backporting Selftests to Stable Kernels?

Dear Stable Maintainers,

When a bugfix is backported to stable kernels, should we be backporting the associated selftest(s)?

eg.

9e30ecf23b1b ("net: ipv4: fix incorrect MTU in broadcast routes") was backported to stable, but the selftest was not: 5777d1871bf6 ("selftests: net: add test for variable PMTU in broadcast routes")

Does stable policy say whether it should be?

It does not fix a bug, per se, but it does enable those of us running stable kernel tests to more thoroughly test stable RCs.

Should mainline authors be encouraged to mark related tests for backporting?

Cheers,

Brett