=================================== FAILURES ===================================
______________________ ArchiverTestCase.test_sparse_file _______________________
self = <borg.testsuite.archiver.ArchiverTestCase testMethod=test_sparse_file>
    def test_sparse_file(self):
        # no sparse file support on Mac OS X
        sparse_support = sys.platform != 'darwin'
        filename = os.path.join(self.input_path, 'sparse')
        content = b'foobar'
        hole_size = 5 * (1 << CHUNK_MAX_EXP)  # 5 full chunker buffers
        with open(filename, 'wb') as fd:
            # create a file that has a hole at the beginning and end (if the
            # OS and filesystem supports sparse files)
            fd.seek(hole_size, 1)
            fd.write(content)
            fd.seek(hole_size, 1)
            pos = fd.tell()
            fd.truncate(pos)
        total_len = hole_size + len(content) + hole_size
        st = os.stat(filename)
        self.assert_equal(st.st_size, total_len)
        if sparse_support and hasattr(st, 'st_blocks'):
            self.assert_true(st.st_blocks * 512 < total_len / 9)  # is input sparse?
        self.cmd('init', self.repository_location)
        self.cmd('create', self.repository_location + '::test', 'input')
        with changedir('output'):
            self.cmd('extract', '--sparse', self.repository_location + '::test')
        self.assert_dirs_equal('input', 'output/input')
        filename = os.path.join(self.output_path, 'input', 'sparse')
        with open(filename, 'rb') as fd:
            # check if file contents are as expected
            self.assert_equal(fd.read(hole_size), b'\0' * hole_size)
            self.assert_equal(fd.read(len(content)), content)
            self.assert_equal(fd.read(hole_size), b'\0' * hole_size)
        st = os.stat(filename)
        self.assert_equal(st.st_size, total_len)
        if sparse_support and hasattr(st, 'st_blocks'):
>           self.assert_true(st.st_blocks * 512 < total_len / 9)  # is output sparse?
E           AssertionError: False is not true
borg/testsuite/archiver.py:416: AssertionError
----------------------------- Captured stderr call -----------------------------
Warning: File system encoding is "ascii", extracting non-ascii filenames will not be supported.
Hint: You likely need to fix your locale setup. E.g. install locales and use: LANG=en_US.UTF-8
___________________ RemoteArchiverTestCase.test_sparse_file ____________________
self = <borg.testsuite.archiver.RemoteArchiverTestCase testMethod=test_sparse_file>
    def test_sparse_file(self):
        # no sparse file support on Mac OS X
        sparse_support = sys.platform != 'darwin'
        filename = os.path.join(self.input_path, 'sparse')
        content = b'foobar'
        hole_size = 5 * (1 << CHUNK_MAX_EXP)  # 5 full chunker buffers
        with open(filename, 'wb') as fd:
            # create a file that has a hole at the beginning and end (if the
            # OS and filesystem supports sparse files)
            fd.seek(hole_size, 1)
            fd.write(content)
            fd.seek(hole_size, 1)
            pos = fd.tell()
            fd.truncate(pos)
        total_len = hole_size + len(content) + hole_size
        st = os.stat(filename)
        self.assert_equal(st.st_size, total_len)
        if sparse_support and hasattr(st, 'st_blocks'):
            self.assert_true(st.st_blocks * 512 < total_len / 9)  # is input sparse?
        self.cmd('init', self.repository_location)
        self.cmd('create', self.repository_location + '::test', 'input')
        with changedir('output'):
            self.cmd('extract', '--sparse', self.repository_location + '::test')
        self.assert_dirs_equal('input', 'output/input')
        filename = os.path.join(self.output_path, 'input', 'sparse')
        with open(filename, 'rb') as fd:
            # check if file contents are as expected
            self.assert_equal(fd.read(hole_size), b'\0' * hole_size)
            self.assert_equal(fd.read(len(content)), content)
            self.assert_equal(fd.read(hole_size), b'\0' * hole_size)
        st = os.stat(filename)
        self.assert_equal(st.st_size, total_len)
        if sparse_support and hasattr(st, 'st_blocks'):
>           self.assert_true(st.st_blocks * 512 < total_len / 9)  # is output sparse?
E           AssertionError: False is not true
borg/testsuite/archiver.py:416: AssertionError
----------------------------- Captured stderr call -----------------------------
Warning: File system encoding is "ascii", extracting non-ascii filenames will not be supported.
Hint: You likely need to fix your locale setup. E.g. install locales and use: LANG=en_US.UTF-8
 56 tests deselected by '-knot test_non_ascii_acl and not test_fuse_mount and not benchmark' 
= 2 failed, 414 passed, 48 skipped, 56 deselected, 2 xfailed in 210.22 seconds =

for full logs please see eg. http://s390.koji.fedoraproject.org/koji/taskinfo?taskID=2192700


Version-Release number of selected component (if applicable):
borgbackup-1.0.2-1.fc24


Additional info:
The s390(x) builder are using XFS for its / filesystem, while other builders in Fedora are ext4 based.