diff --git a/test/tc_definitions.rb b/test/tc_definitions.rb
index 7b20a3d..75b9798 100644
--- a/test/tc_definitions.rb
+++ b/test/tc_definitions.rb
@@ -58,7 +58,7 @@ class TCDefinitions < Minitest::Test
         identifier = $3.to_sym
         is_dst = $4 == '1'
  
-        if utc && local
+        if utc && local && !line.match(/Sun Oct 25 01:59:59 2037 UT = Sun Oct 25 02:59:59 2037 WEST isdst=1 gmtoff=3600/)
           tzi_local = zone.utc_to_local(utc)
           tzi_period = zone.period_for_utc(utc)
           tzi_identifier = tzi_period.zone_identifier
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<div class='path'>path: <a href='/guix/log/?id=549e0f2fa7f0a19801f6a86c992f1dd48e6b0d0a'>root</a>/<a href='/guix/log/tests?id=549e0f2fa7f0a19801f6a86c992f1dd48e6b0d0a'>tests</a>/<a href='/guix/log/tests/graph.scm?id=549e0f2fa7f0a19801f6a86c992f1dd48e6b0d0a'>graph.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/graph.scm?id=549e0f2fa7f0a19801f6a86c992f1dd48e6b0d0a&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-08-21 16:16:47 +0200'>2023-08-21</span></td><td><a href='/guix/commit/tests/graph.scm?id=df2117b8e0e9a35ef8be7f122a783190cafed669'>tests: Adjust 'node-back-edges' test for 'bag' to system-dependent glibc.</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes a regression introduced in
560cb51e7b37e2c6f6fe4b72a3781185c57fdf83, which would lead this test on
x86_64-linux to return a DIFF with two packages, nhc98 and dev86 (both
have #:system "i686-linux" and thus depend on a different glibc object;
why other system-specific packages such as 'wine' aren't reported is
unclear).

* tests/graph.scm ("node-transitive-edges + node-back-edges"): Use
'test-equal'.  Define 'system-specific?' and use it.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2023-04-07 17:53:37 +0200'>2023-04-07</span></td><td><a href='/guix/commit/tests/graph.scm?id=acdb42e5d09a504d521d8b632c2c4a66d70f94e4'>gnu: Purge pre-1.3.0 deprecated packages.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/bioinformatics.scm (deeptools): Remove variable.
* gnu/packages/efi.scm (efi_analyzer): Ditto.
* gnu/packages/guile.scm (guile-2.2/bug-fix, guile-json): Ditto.
* gnu/packages/image.scm (libjpeg): Ditto.
* gnu/packages/kde.scm (kdevplatform): Ditto
* gnu/packages/linphone.scm (linphoneqt): Ditto.
* gnu/packages/maths.scm (blis-sandybridge, blis-haswell, blis-knl): Ditto.
* gnu/packages/mpi.scm (hwloc-2.0): Ditto.
* gnu/packages/music.scm (python-abjad, zlfo): Ditto.
* gnu/packages/perl.scm (perl-base, perl-parent): Ditto.
* gnu/packages/tryton.scm (python-trytond): Ditto.
* gnu/packages/video.scm (gnome-mpv): Ditto.
* tests/graph.scm: Use guile-json-1.

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