diff --git a/chrony-test-fix-util-unit-test-for-NTP-era-split.patch b/chrony-test-fix-util-unit-test-for-NTP-era-split.patch
new file mode 100644
index 0000000..c1841ed
--- /dev/null
+++ b/chrony-test-fix-util-unit-test-for-NTP-era-split.patch
@@ -0,0 +1,41 @@
+From 2d9eb5b6fa5225a7300c8eed95712969249900fb Mon Sep 17 00:00:00 2001
+From: Miroslav Lichvar <mlichvar@redhat.com>
+Date: Fri, 3 Jan 2020 11:25:55 +0100
+Subject: [PATCH] test: fix util unit test for NTP era split
+
+The current default NTP era split passed the Unix epoch (~50 years ago),
+which means the epoch converted to an NTP timestamp and back ends up in
+the next NTP era (year 2106).
+
+Fix the test to take into account the era split.
+---
+ test/unit/util.c | 8 ++++++++
+ 1 file changed, 8 insertions(+)
+
+diff --git a/test/unit/util.c b/test/unit/util.c
+index f4d9f33..af9e90c 100644
+--- a/test/unit/util.c
++++ b/test/unit/util.c
+@@ -100,11 +100,19 @@ void test_unit(void) {
+   ntp_ts.hi = htonl(JAN_1970);
+   ntp_ts.lo = 0xffffffff;
+   UTI_Ntp64ToTimespec(&ntp_ts, &ts);
++#if defined(HAVE_LONG_TIME_T) && NTP_ERA_SPLIT > 0
++  TEST_CHECK(ts.tv_sec == 0x100000000LL * (1 + (NTP_ERA_SPLIT - 1) / 0x100000000LL));
++#else
+   TEST_CHECK(ts.tv_sec == 0);
++#endif
+   TEST_CHECK(ts.tv_nsec == 999999999);
+ 
+   UTI_AddDoubleToTimespec(&ts, 1e-9, &ts);
++#if defined(HAVE_LONG_TIME_T) && NTP_ERA_SPLIT > 0
++  TEST_CHECK(ts.tv_sec == 1 + 0x100000000LL * (1 + (NTP_ERA_SPLIT - 1) / 0x100000000LL));
++#else
+   TEST_CHECK(ts.tv_sec == 1);
++#endif
+   TEST_CHECK(ts.tv_nsec == 0);
+ 
+   ntp_fuzz.hi = 0;
+-- 
+2.25.0
+
diff --git a/chrony.changes b/chrony.changes
index 6681878..7eaa3b7 100644
--- a/chrony.changes
+++ b/chrony.changes
@@ -2,6 +2,7 @@
 Wed Feb 12 09:24:24 UTC 2020 - Martin Liška <mliska@suse.cz>
 
 - Update clknetsim to version 79ffe44 (fixes boo#1162964).
+- Backport test-fix-util-unit-test-for-NTP-era-split.patch.
 
 -------------------------------------------------------------------
 Sat Oct 26 10:39:29 UTC 2019 - Arjen de Korte <suse+build@de-korte.org>
diff --git a/chrony.spec b/chrony.spec
index 1615daf..d262ed5 100644
--- a/chrony.spec
+++ b/chrony.spec
@@ -46,6 +46,7 @@ Patch0:         chrony-config.patch
 Patch1:         chrony-service-helper.patch
 Patch2:         chrony-logrotate.patch
 Patch3:         chrony-service-ordering.patch
+Patch4:         chrony-test-fix-util-unit-test-for-NTP-era-split.patch
 BuildRequires:  NetworkManager-devel
 BuildRequires:  bison
 BuildRequires:  gcc-c++
@@ -98,6 +99,7 @@ or a different computer.
 %patch1 -p1
 %patch2 -p1
 %patch3
+%patch4 -p1
 
 # If this is an openSUSE build, use our vendor zone
 # (2.*pool.ntp.org names include IPv6 addresses). If not