diff --git a/src/test/modules/test_misc/meson.build b/src/test/modules/test_misc/meson.build
index 969e90b396d..e1f5f915084 100644
--- a/src/test/modules/test_misc/meson.build
+++ b/src/test/modules/test_misc/meson.build
@@ -22,6 +22,7 @@ tests += {
       't/011_lock_stats.pl',
       't/012_ddlutils.pl',
       't/013_temp_obj_multisession.pl',
+      't/014_jit_s390x.pl',
     ],
     # The injection points are cluster-wide, so disable installcheck
     'runningcheck': false,
diff --git a/src/test/modules/test_misc/t/014_jit_s390x.pl b/src/test/modules/test_misc/t/014_jit_s390x.pl
new file mode 100644
index 00000000000..e80bc29fdb5
--- /dev/null
+++ b/src/test/modules/test_misc/t/014_jit_s390x.pl
@@ -0,0 +1,63 @@
+# Copyright (c) 2026, PostgreSQL Global Development Group
+
+use strict;
+use warnings FATAL => 'all';
+
+use PostgreSQL::Test::Cluster;
+use Test::More;
+
+my $node = PostgreSQL::Test::Cluster->new('jit_s390x');
+$node->init;
+$node->append_conf(
+	'postgresql.conf', qq{
+restart_after_crash = on
+jit = on
+});
+$node->start;
+
+my $version = $node->safe_psql('postgres', 'SELECT version()');
+plan skip_all => 's390x-specific LLVM JIT test'
+  unless $version =~ /s390x/;
+
+my $jit_available =
+  $node->safe_psql('postgres', 'SELECT pg_catalog.pg_jit_available()');
+plan skip_all => 'LLVM JIT is not available'
+  unless $jit_available eq 't';
+
+$node->safe_psql(
+	'postgres',
+	q{
+CREATE FUNCTION type_text(oid) RETURNS text
+LANGUAGE sql STABLE
+AS $$
+  SELECT typname::text
+  FROM pg_catalog.pg_type
+  WHERE oid = $1
+$$;
+});
+
+my ($ret, $stdout, $stderr) = $node->psql(
+	'postgres',
+	q{
+SET jit = on;
+SET jit_above_cost = 0;
+SET jit_inline_above_cost = -1;
+SET jit_optimize_above_cost = -1;
+SET jit_expressions = on;
+SET jit_tuple_deforming = off;
+
+SELECT count(*)
+FROM (
+	SELECT oid
+	FROM pg_catalog.pg_type
+	ORDER BY oid
+	LIMIT 7
+) AS t
+WHERE type_text(t.oid) = 'int2vector';
+});
+
+is($ret, 0, 'JIT-compiled SQL function expression does not crash the backend');
+is($stdout, "1\n", 'JIT-compiled SQL function expression returns expected row');
+diag($stderr) if $ret != 0 && $stderr ne '';
+
+done_testing();