Recommendations for bisecting a test failure?

[Dave Johansen]

I'm working on packaging hgsubversion (
https://bugzilla.redhat.com/show_bug.cgi?id=1221459 ) and I've run into
some test failures on F23/Rawhide that seem to be caused by the update to
subversion 1.9.0. Upstream has recommended that I try and bisect the source
of the failure (
https://groups.google.com/d/msg/hgsubversion/q47xvqDDmS0/2nW2Q6PoAwAJ ).
Any recommendations on setting up an automated way to do that in Fedora?
Thanks,
Dave
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