diff --git a/lang/en/timezones.php b/lang/en/timezones.php
index 417a4fb108b..b79c92f46ed 100644
--- a/lang/en/timezones.php
+++ b/lang/en/timezones.php
@@ -182,6 +182,7 @@ $string['america/noronha'] = 'America/Noronha';
 $string['america/north_dakota/beulah'] = 'America/North_Dakota/Beulah';
 $string['america/north_dakota/center'] = 'America/North_Dakota/Center';
 $string['america/north_dakota/new_salem'] = 'America/North_Dakota/New_Salem';
+$string['america/nuuk'] = 'America/Nuuk';
 $string['america/ojinaga'] = 'America/Ojinaga';
 $string['america/panama'] = 'America/Panama';
 $string['america/pangnirtung'] = 'America/Pangnirtung';
diff --git a/lib/tests/date_test.php b/lib/tests/date_test.php
index 702124e9bc2..3cdaf211621 100644
--- a/lib/tests/date_test.php
+++ b/lib/tests/date_test.php
@@ -170,7 +170,8 @@ class core_date_testcase extends advanced_testcase {
         $phpzones = DateTimeZone::listIdentifiers();
         $manager = get_string_manager();
         foreach ($phpzones as $tz) {
-            $this->assertTrue($manager->string_exists(strtolower($tz), 'core_timezones'));
+            $this->assertTrue($manager->string_exists(strtolower($tz), 'core_timezones'),
+                    'String for timezone ' . strtolower($tz) . ' not found.');
         }
     }