Failing tests/comparators/test_debian.py::test_dot_changes_no_differences_exclude_buildinfo test

Job #1382054 failed for 9a3553b8:

__________________________________________________ test_dot_changes_no_differences_exclude_buildinfo ___________________________________________________

dot_changes1 = <<class 'abc.DotChangesFile'> /tmp/pytest-of-lamby/pytest-4/test_dot_changes_no_difference1/a/test_1.changes>
dot_changes3 = <<class 'abc.DotChangesFile'> /tmp/pytest-of-lamby/pytest-4/test_dot_changes_no_difference1/c/test_3.changes>

    @skip_unless_module_exists("debian.deb822")
    def test_dot_changes_no_differences_exclude_buildinfo(
        dot_changes1, dot_changes3
    ):
        difference = dot_changes1.compare(dot_changes3)
>       assert difference is None
E       assert <Difference /tmp/pytest-of-lamby/pytest-4/test_dot_changes_no_difference1/a/test_1.changes -- /tmp/pytest-of-lamby/pyt...- Files []>, <Difference test_1.buildinfo -- test_2.buildinfo [<Difference Checksums-Sha256 -- Checksums-Sha256 []>]>]> is None

tests/comparators/test_debian.py:160: AssertionError
------------------------------------------------------------------- Captured log call -------------------------------------------------------------------
WARNING  diffoscope.comparators.directory:directory.py:178 Unable to stat file "test_1_all.deb" or "test_1_all.deb" ([Errno 2] No such file or directory: 'test_1_all.deb')
WARNING  diffoscope.comparators.directory:directory.py:178 Unable to stat file "test_1.buildinfo" or "test_2.buildinfo" ([Errno 2] No such file or directory: 'test_1.buildinfo')

Caused by 8c50cb83. Will address ASAP.