Version 3.5.11 added a test to check that the default trust store is readable.
It does not exist in the build environment, so pretend everything is fine.

diff a/tests/trust-store.c b/tests/trust-store.c
--- a/tests/trust-store.c
+++ b/tests/trust-store.c
@@ -61,7 +61,7 @@
 	} else if (ret < 0) {
 		fail("error loading system trust store: %s\n", gnutls_strerror(ret));
 	} else if (ret == 0) {
-		fail("no certificates were found in system trust store!\n");
+		success("no trust store in the Guix build environment!\n");
 	}
 
 	gnutls_certificate_free_credentials(x509_cred);
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<div class='path'>path: <a href='/guix/log/?id=9478a252509a93f3e7f486cbc549631185ba071d'>root</a>/<a href='/guix/log/tests?id=9478a252509a93f3e7f486cbc549631185ba071d'>tests</a>/<a href='/guix/log/tests/file-systems.scm?id=9478a252509a93f3e7f486cbc549631185ba071d'>file-systems.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/file-systems.scm?id=9478a252509a93f3e7f486cbc549631185ba071d&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2021-07-18 02:10:49 -0400'>2021-07-18</span></td><td><a href='/guix/commit/tests/file-systems.scm?id=11f0698243da27be93b16cec574fbf262279779a'>pack: Streamline how files are included in tarballs.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2021-06-29 14:53:21 -0400'>2021-06-29</span></td><td><a href='/guix/commit/tests/file-systems.scm?id=4f3bdc8f21657dbda857027b3ec8754dd4c7c67b'>pack: Prevent duplicate files in tar archives.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2020-05-20 08:30:35 -0400'>2020-05-20</span></td><td><a href='/guix/commit/tests/file-systems.scm?id=b460ba7992a0b4af2ddb5927dcf062784539ef7b'>bootloader: grub: Allow booting from a Btrfs subvolume.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2020-05-20 08:30:34 -0400'>2020-05-20</span></td><td><a href='/guix/commit/tests/file-systems.scm?id=fa35fb58c84d1c1741e4e63c0b37074e35ed2a61'>file-systems: Add helpers for parsing the options string into an alist.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>