Procedure for dealing with test/build failures?

I've been working on updating libmime-tools-perl to its new upstream
version 5.516, but ran into issues due to test failures. Upon
investigation, it seems the test failures are due to the upstream not
including a required test file in the upstream distribution. I've
opened an issue with the upstream bug tracker and mentioned the test
failures under the PROBLEM section of d/changelog. Is there a standard
procedure for handling these kinds of issues that I've been
neglecting, or is this the proper way to go about handling problems
like these? Thank you.