Retain environment setting of "HOME" for tests that need os.path.expanduser()
to return a readable directory in the build chroot.

--- thefuck-3.25/tests/conftest.py
+++ thefuck-3.25/tests/conftest.py
@@ -64,6 +64,7 @@ def set_shell(monkeypatch):
 
 @pytest.fixture(autouse=True)
 def os_environ(monkeypatch):
-    env = {'PATH': os.environ['PATH']}
+    env = {'PATH': os.environ['PATH'],
+           'HOME': os.environ['HOME']}
     monkeypatch.setattr('os.environ', env)
     return env
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<div class='path'>path: <a href='/guix/log/?id=e9a99d768bfc8ca7f00d1d849d928383e44c0ab0'>root</a>/<a href='/guix/log/tests?id=e9a99d768bfc8ca7f00d1d849d928383e44c0ab0'>tests</a>/<a href='/guix/log/tests/build-emacs-utils.scm?id=e9a99d768bfc8ca7f00d1d849d928383e44c0ab0'>build-emacs-utils.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/build-emacs-utils.scm?id=e9a99d768bfc8ca7f00d1d849d928383e44c0ab0&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2022-07-13 10:49:40 -0400'>2022-07-13</span></td><td><a href='/guix/commit/tests/build-emacs-utils.scm?id=dcf133587ac7d73ba306a314e1a496a7efb9960b'>tests: build-emacs-utils: Allow test to pass on Emacs 27 too.</a><span class='msg-avail'>...<span class='msg-tooltip'>* tests/build-emacs-utils.scm
("emacs-batch-script: raise &amp;emacs-batch-error on failure"): More loosely
match expected error string, which differs between Emacs 27 and Emacs 28.
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2022-06-17 23:39:32 +0200'>2022-06-17</span></td><td><a href='/guix/commit/tests/build-emacs-utils.scm?id=c3afbd05bf541b31b122e6093ff10eabf6a47926'>guix: emacs-utils: Add emacs-header-parse.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/build/emacs-utils.scm (emacs-header-parse): New procedure.

* tests/build-emacs-utils.scm ("emacs-header-parse: fetch version",
  "emacs-header-parse: fetch keywords", "emacs-header-parse: fetch
  nonexistent author"): New tests.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Fredrik Salomonsson</td></tr>
<tr><td><span title='2022-06-17 23:39:31 +0200'>2022-06-17</span></td><td><a href='/guix/commit/tests/build-emacs-utils.scm?id=f8275916fc6fcb3dd9bd8ef7dc4ddce2dca98c7d'>guix: emacs-utils: Add emacs-batch-script.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/build/emacs-utils.scm (emacs-batch-script): New procedure.

* tests/build-emacs-utils.scm: New file.

* Makefile.am (TESTS): Add `tests/build-emacs-utils.scm'.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Fredrik Salomonsson</td></tr>