diff --git a/tests/auto/corelib/tools/qdatetime/tst_qdatetime.cpp b/tests/auto/corelib/tools/qdatetime/tst_qdatetime.cpp
index d460beafde2..c0b7674f22e 100644
--- a/tests/auto/corelib/tools/qdatetime/tst_qdatetime.cpp
+++ b/tests/auto/corelib/tools/qdatetime/tst_qdatetime.cpp
@@ -2726,15 +2726,15 @@ void tst_QDateTime::timeZoneAbbreviation()
         qDebug("(Skipped some CET-only tests)");
     }
 
+    QString cet(QStringLiteral("CET")), cest(QStringLiteral("CEST"));
 #ifdef Q_OS_ANDROID // Only reports (general) zones as offsets (QTBUG-68837)
-    const QString cet(QStringLiteral("GMT+01:00"));
-    const QString cest(QStringLiteral("GMT+02:00"));
-#elif defined Q_OS_DARWIN
-    const QString cet(QStringLiteral("GMT+1"));
-    const QString cest(QStringLiteral("GMT+2"));
-#else
-    const QString cet(QStringLiteral("CET"));
-    const QString cest(QStringLiteral("CEST"));
+    cet = QStringLiteral("GMT+01:00");
+    cest = QStringLiteral("GMT+02:00");
+#elif defined Q_OS_DARWIN // Lacked real names until 10.13, High Sierra
+    if (QOperatingSystemVersion::current() < QOperatingSystemVersion::MacOSHighSierra) {
+        cet = QStringLiteral("GMT+1");
+        cest = QStringLiteral("GMT+2");
+    }
 #endif
 
     QDateTime dt5(QDate(2013, 1, 1), QTime(0, 0, 0), QTimeZone("Europe/Berlin"));
diff --git a/tests/auto/corelib/tools/qlocale/tst_qlocale.cpp b/tests/auto/corelib/tools/qlocale/tst_qlocale.cpp
index b76851a0ec1..d649e661588 100644
--- a/tests/auto/corelib/tools/qlocale/tst_qlocale.cpp
+++ b/tests/auto/corelib/tools/qlocale/tst_qlocale.cpp
@@ -1585,15 +1585,15 @@ void tst_QLocale::formatTimeZone()
         qDebug("(Skipped some CET-only tests)");
     }
 
+    QString cet(QStringLiteral("CET")), cest(QStringLiteral("CEST"));
 #ifdef Q_OS_ANDROID // Only reports (general) zones as offsets (QTBUG-68837)
-    const QString cet(QStringLiteral("GMT+01:00"));
-    const QString cest(QStringLiteral("GMT+02:00"));
-#elif defined Q_OS_DARWIN
-    const QString cet(QStringLiteral("GMT+1"));
-    const QString cest(QStringLiteral("GMT+2"));
-#else
-    const QString cet(QStringLiteral("CET"));
-    const QString cest(QStringLiteral("CEST"));
+    cet = QStringLiteral("GMT+01:00");
+    cest = QStringLiteral("GMT+02:00");
+#elif defined Q_OS_DARWIN // Lacked real names until 10.13, High Sierra
+    if (QOperatingSystemVersion::current() < QOperatingSystemVersion::MacOSHighSierra) {
+        cet = QStringLiteral("GMT+1");
+        cest = QStringLiteral("GMT+2");
+    }
 #endif
 
     QDateTime dt6(QDate(2013, 1, 1), QTime(0, 0, 0), QTimeZone("Europe/Berlin"));