This test incorrectly assumes that the root user is always available.
However, in the build environment, the root user is not available.
Note that because the original file distributed in the release on PyPi
has lines ending in CRLF, those are retained in the diff below.

--- a/pyfakefs/tests/fake_filesystem_test.py	1969-12-31 16:00:00.000000000 -0800
+++ b/pyfakefs/tests/fake_filesystem_test.py	1969-12-31 16:00:00.000000000 -0800
@@ -1021,15 +1021,6 @@
             self.assertEqual(self.path.expanduser('~'),
                              self.os.environ['HOME'].replace('/', '!'))
 
-    @unittest.skipIf(TestCase.is_windows or TestCase.is_cygwin,
-                     'only tested on unix systems')
-    def test_expand_root(self):
-        if sys.platform == 'darwin':
-            roothome = '!var!root'
-        else:
-            roothome = '!root'
-        self.assertEqual(self.path.expanduser('~root'), roothome)
-
     def test_getsize_path_nonexistent(self):
         file_path = 'foo!bar!baz'
         self.assertRaises(os.error, self.path.getsize, file_path)
=68238b73b346bbf117cafc3bc0b9d00ef4a01e5f'>refs</a><a class='active' href='/guix/log/tests/services/linux.scm'>log</a><a href='/guix/tree/tests/services/linux.scm?id=68238b73b346bbf117cafc3bc0b9d00ef4a01e5f'>tree</a><a href='/guix/commit/tests/services/linux.scm?id=68238b73b346bbf117cafc3bc0b9d00ef4a01e5f'>commit</a><a href='/guix/diff/tests/services/linux.scm?id=68238b73b346bbf117cafc3bc0b9d00ef4a01e5f'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/tests/services/linux.scm'>
<input type='hidden' name='id' value='68238b73b346bbf117cafc3bc0b9d00ef4a01e5f'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=68238b73b346bbf117cafc3bc0b9d00ef4a01e5f'>root</a>/<a href='/guix/log/tests?id=68238b73b346bbf117cafc3bc0b9d00ef4a01e5f'>tests</a>/<a href='/guix/log/tests/services?id=68238b73b346bbf117cafc3bc0b9d00ef4a01e5f'>services</a>/<a href='/guix/log/tests/services/linux.scm?id=68238b73b346bbf117cafc3bc0b9d00ef4a01e5f'>linux.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/tests/services/linux.scm?id=68238b73b346bbf117cafc3bc0b9d00ef4a01e5f&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-08-02 15:54:37 +0300'>2020-08-02</span></td><td><a href='/guix/commit/tests/services/linux.scm?id=587e0d911dfff81647015e89847084b606e68f71'>services: Add zram-device-service.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/linux.scm (&lt;zram-device-configuration&gt;): New record.
(zram-device-service-type): New variable.
* doc/guix.texi (Linux Services): Document it.
* tests/services/linux.scm (zram-swap-device-test): New tests.
</span></span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2020-01-31 23:37:13 -0500'>2020-01-31</span></td><td><a href='/guix/commit/tests/services/linux.scm?id=d3e439e355284f136ff13eb3e6fffb4661552f3b'>gnu: Add earlyoom-service-type.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/linux.scm: New file.
* tests/services/linux.scm: Add test.
* Makefile.am (SCM_TESTS): Register test.
* doc/guix.texi (Linux Services): Add a new section and document the new
service and its configuration.
</span></span></td><td>Maxim Cournoyer</td></tr>