test fails with file 5.40

I see some test fails with file 5.40 as opposed to 5.39. I had a closer look at test_guess_file_type which uses tests/data/binary1

> file tests/data/binary1
tests/data/binary1: OpenPGP Public Key
> file --version
file-5.40

Using the older version:

> file --version
file-5.39
> file diffoscope-173/tests/data/binary1
diffoscope-173/tests/data/binary1: data

These are all the errors that I see which I assume are related to this (all looking "similar"):

[   33s] _______________________________ test_difference ________________________________
[   33s] 
[   33s] differences = [<Difference filetype from file(1) -- filetype from file(1) []>, <Difference filetype from diffoscope -- filetype from...ent -- r/r.zip []>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]>]
[   33s] 
[   33s]     @skip_unless_file_version_is_at_least("5.37")
[   33s]     def test_difference(differences):
[   33s]         expected_diff = get_data("quine_expected_diff")
[   33s] >       assert differences[0].unified_diff == expected_diff
[   33s] E       AssertionError: assert '@@ -1 +1 @@\...hod=deflate\n' == '@@ -1 +1 @@\... to extract\n'
[   33s] E         Skipping 124 identical leading characters in diff, use -v to show
[   33s] E         - to extract
[   33s] E         + to extract, compression method=deflate
[   33s] 
[   33s] tests/test_quines.py:57: AssertionError
[   33s] _____________________________ test_guess_file_type _____________________________
[   33s] 
[   33s]     def test_guess_file_type():
[   33s] >       assert File.guess_file_type(TEST_FILE1_PATH) == "data"
[   33s] E       AssertionError: assert 'OpenPGP Public Key' == 'data'
[   33s] E         - data
[   33s] E         + OpenPGP Public Key
[   33s] 
[   33s] tests/comparators/test_binary.py:59: AssertionError
[   33s] __________________________________ test_equal __________________________________
[   33s] 
[   33s] set1 = {'bzip2': <<class 'abc.Bzip2File'> /home/abuild/rpmbuild/BUILD/diffoscope-173/tests/data/containers/a.tar.bz2>, 'gzip'...ners/a.tar.gz>, 'xz': <<class 'abc.XzFile'> /home/abuild/rpmbuild/BUILD/diffoscope-173/tests/data/containers/a.tar.xz>}
[   33s] 
[   33s]     @skip_unless_tools_exist("xz")
[   33s]     @skip_unless_file_version_is_at_least("5.37")
[   33s]     def test_equal(set1):
[   33s]         for x, y in itertools.product(TYPES, TYPES):
[   33s]             diff = set1[x].compare(set1[y])
[   33s]             if x == y:
[   33s]                 assert diff is None
[   33s]             else:
[   33s]                 differences = diff.details
[   33s] >               assert differences[0].unified_diff == expected_magic_diff(
[   33s]                     x, y
[   33s]                 ), "{} {}".format(x, y)
[   33s] E               AssertionError: gzip xz
[   33s] E               assert '@@ -1 +1 @@\...cksum CRC64\n' == '@@ -1 +1 @@\...ressed data\n'
[   33s] E                 Skipping 95 identical leading characters in diff, use -v to show
[   33s] E                 - essed data
[   33s] E                 + essed data, checksum CRC64
[   33s] 
[   33s] tests/comparators/test_containers.py:77: AssertionError
[   33s] ________________________________ test_different ________________________________
[   33s] 
[   33s] set1 = {'bzip2': <<class 'abc.Bzip2File'> /home/abuild/rpmbuild/BUILD/diffoscope-173/tests/data/containers/a.tar.bz2>, 'gzip'...ners/a.tar.gz>, 'xz': <<class 'abc.XzFile'> /home/abuild/rpmbuild/BUILD/diffoscope-173/tests/data/containers/a.tar.xz>}
[   33s] set2 = {'bzip2': <<class 'abc.Bzip2File'> /home/abuild/rpmbuild/BUILD/diffoscope-173/tests/data/containers/b.tar.bz2>, 'gzip'...ners/b.tar.gz>, 'xz': <<class 'abc.XzFile'> /home/abuild/rpmbuild/BUILD/diffoscope-173/tests/data/containers/b.tar.xz>}
[   33s] 
[   33s]     @skip_unless_tools_exist("xz")
[   33s]     @skip_unless_file_version_is_at_least("5.37")
[   33s]     def test_different(set1, set2):
[   33s]         for x, y in itertools.product(TYPES, TYPES):
[   33s]             expected_diff = get_data("containers/different_files_expected_diff")
[   33s]             differences = set1[x].compare(set2[y]).details
[   33s]             if x == y:
[   33s]                 assert differences[0].details[1].unified_diff == expected_diff
[   33s]             else:
[   33s] >               assert differences[0].unified_diff == expected_magic_diff(
[   33s]                     x, y
[   33s]                 ), "{} {}".format(x, y)
[   33s] E               AssertionError: gzip xz
[   33s] E               assert '@@ -1 +1 @@\...cksum CRC64\n' == '@@ -1 +1 @@\...ressed data\n'
[   33s] E                 Skipping 95 identical leading characters in diff, use -v to show
[   33s] E                 - essed data
[   33s] E                 + essed data, checksum CRC64
[   33s] 
[   33s] tests/comparators/test_containers.py:95: AssertionError

Do you see something similar? (I'm using openSUSE Tumbleweed here, not Debian, so issues could lie elsewhere as well)