TemplateTestCaseA.test_orientation fails

[mcepl]

While packaging this package for openSUSE, I have this one test fail with Python 3.6.15 with DJANGO_SETTINGS_MODULE set to tests.settings.imagemagick:

[   59s] + DJANGO_SETTINGS_MODULE=tests.settings.imagemagick
[   59s] + PYTHONPATH=.:/home/abuild/rpmbuild/BUILDROOT/python-sorl-thumbnail-12.7.0-0.x86_64/usr/lib/python3.6/site-packages
[   59s] + PYTHONDONTWRITEBYTECODE=1
[   59s] + pytest-3.6 --ignore=_build.python36 --ignore=_build.python39 --ignore=_build.python38 -v -rs -k 'not TemplateTestCaseB and not test_image_file_deserialize'
[   60s] ============================= test session starts ==============================
[   60s] platform linux -- Python 3.6.15, pytest-6.2.5, py-1.10.0, pluggy-0.13.1 -- /usr/bin/python3.6
[   60s] cachedir: .pytest_cache
[   60s] django: settings: tests.settings.imagemagick (from env)
[   60s] rootdir: /home/abuild/rpmbuild/BUILD/sorl-thumbnail-12.7.0, configfile: setup.cfg, testpaths: tests
[   60s] plugins: django-4.1.0
[   60s] collecting ... collected 76 items / 4 deselected / 72 selected

[ ... plenty of passing and skipped tests ... ]

[   65s] =================================== FAILURES ===================================
[   65s] ______________________ TemplateTestCaseA.test_orientation ______________________
[   65s]
[   65s] self = <tests.thumbnail_tests.test_templatetags.TemplateTestCaseA testMethod=test_orientation>
[   65s]
[   65s]     def test_orientation(self):
[   65s]         ref = Image.open(os.path.join(DATA_DIR, '1_topleft.jpg'))
[   65s]         top = ref.getpixel((14, 7))
[   65s]         left = ref.getpixel((7, 14))
[   65s]         engine = PILEngine()
[   65s]
[   65s]         def epsilon(x, y):
[   65s]             if isinstance(x, (tuple, list)):
[   65s]                 x = sum(x) / len(x)
[   65s]             if isinstance(y, (tuple, list)):
[   65s]                 y = sum(y) / len(y)
[   65s]             return abs(x - y)
[   65s]
[   65s]         data_images = (
[   65s]             '1_topleft.jpg',
[   65s]             '2_topright.jpg',
[   65s]             '3_bottomright.jpg',
[   65s]             '4_bottomleft.jpg',
[   65s]             '5_lefttop.jpg',
[   65s]             '6_righttop.jpg',
[   65s]             '7_rightbottom.jpg',
[   65s]             '8_leftbottom.jpg'
[   65s]         )
[   65s]
[   65s]         for name in data_images:
[   65s]             th = self.BACKEND.get_thumbnail('data/%s' % name, '30x30')
[   65s]             im = engine.get_image(th)
[   65s]
[   65s]             self.assertLess(epsilon(top, im.getpixel((14, 7))), 10)
[   65s] >           self.assertLess(epsilon(left, im.getpixel((7, 14))), 10)
[   65s] E           AssertionError: 62 not less than 10
[   65s]
[   65s] tests/thumbnail_tests/test_templatetags.py:110: AssertionError
[   65s] ------------------------------ Captured log call -------------------------------
[   65s] DEBUG    slog:storage.py:49 exists: test/cache/c9/9a/c99a5bdaa10e2eb83215159fdd429d67.jpg
[   65s] DEBUG    slog:storage.py:25 open: data/1_topleft.jpg
[   65s] DEBUG    slog:storage.py:29 save: test/cache/c9/9a/c99a5bdaa10e2eb83215159fdd429d67.jpg
[   65s] DEBUG    slog:storage.py:37 get_available_name: test/cache/c9/9a/c99a5bdaa10e2eb83215159fdd429d67.jpg
[   65s] DEBUG    slog:storage.py:49 exists: test/cache/c9/9a/c99a5bdaa10e2eb83215159fdd429d67.jpg
[   65s] DEBUG    slog:storage.py:25 open: test/cache/c9/9a/c99a5bdaa10e2eb83215159fdd429d67.jpg
[   65s] =============================== warnings summary ===============================
[   65s] tests/thumbnail_tests/test_templatetags.py::TemplateTestCaseClient::test_empty_error
[   65s]   /home/abuild/rpmbuild/BUILD/sorl-thumbnail-12.7.0/tests/thumbnail_tests/urls.py:10: RemovedInDjango40Warning: django.conf.urls.url() is deprecated in favor of django.urls.re_path().
[   65s]     {'document_root': settings.MEDIA_ROOT, 'show_indexes': True}),
[   65s]
[   65s] tests/thumbnail_tests/test_templatetags.py::TemplateTestCaseClient::test_empty_error
[   65s]   /home/abuild/rpmbuild/BUILD/sorl-thumbnail-12.7.0/tests/thumbnail_tests/urls.py:11: RemovedInDjango40Warning: django.conf.urls.url() is deprecated in favor of django.urls.re_path().
[   65s]     url(r'^(.*\.html)$', direct_to_template),
[   65s]
[   65s] -- Docs: https://docs.pytest.org/en/stable/warnings.html
[   65s] =========================== short test summary info ============================
[   65s] SKIPPED [1] tests/thumbnail_tests/test_engines.py:240: RGBA is only supported in PIL
[   65s] SKIPPED [1] tests/thumbnail_tests/test_engines.py:373: the other engines fail this test
[   65s] SKIPPED [1] tests/thumbnail_tests/test_engines.py:347: the other engines fail this test
[   65s] SKIPPED [1] tests/thumbnail_tests/test_engines.py:589: See issue #427. This seems to not-fail with wand
[   65s] SKIPPED [1] tests/thumbnail_tests/test_engines.py:576: See issue #427
[   65s] ====== 1 failed, 66 passed, 5 skipped, 4 deselected, 2 warnings in 5.24s =======

Any idea, what's going on, please?

Complete logs with detailed information about all packages used and steps taken.