diff --git a/tests/auto/corelib/kernel/qtranslator/tst_qtranslator.cpp b/tests/auto/corelib/kernel/qtranslator/tst_qtranslator.cpp
index fae3b4118e1..eedf59a7c99 100644
--- a/tests/auto/corelib/kernel/qtranslator/tst_qtranslator.cpp
+++ b/tests/auto/corelib/kernel/qtranslator/tst_qtranslator.cpp
@@ -174,6 +174,7 @@ void tst_QTranslator::loadLocale_data()
     QTest::addRow("Australia")
                             << QLocale("en-AU")
                             << QStringList{"en-Latn-AU", "en-AU", "en"};
+    QTest::addRow("Taiwan") << QLocale("zh-TW") << QStringList{"zh-TW", "zh"};
 
     // This produces a QLocale::uiLanguages list of
     // {"en-NO", "en-Latn-NO", "nb-NO", "nb-Latn-NO", "nb",
@@ -181,6 +182,10 @@ void tst_QTranslator::loadLocale_data()
     QTest::addRow("System, mixed languages")
                             << QLocale::system()
                             << QStringList{"en-NO", "nb-NO", "de-DE", "zh-Hant-NO"};
+    QTest::addRow("System, mixed dialects")
+                            << QLocale::system()
+                            << QStringList{"en-AU", "en-NZ", "de-DE", "en-GB"};
+    QTest::addRow("System, Taiwan") << QLocale::system() << QStringList{"zh-TW", "zh"};
 }
 
 void tst_QTranslator::loadLocale()
diff --git a/tests/auto/corelib/text/qlocale/tst_qlocale.cpp b/tests/auto/corelib/text/qlocale/tst_qlocale.cpp
index 6b001d6ec3c..dae96188591 100644
--- a/tests/auto/corelib/text/qlocale/tst_qlocale.cpp
+++ b/tests/auto/corelib/text/qlocale/tst_qlocale.cpp
@@ -3711,6 +3711,9 @@ void tst_QLocale::uiLanguages_data()
     QTest::newRow("zh_Hant")
         << QLocale("zh_Hant")
         << QStringList{QString("zh-Hant-TW"), QString("zh-TW")};
+    QTest::newRow("zh_TW")
+        << QLocale("zh_TW")
+        << QStringList{u"zh-Hant-TW"_s, u"zh-TW"_s};
 
     QTest::newRow("zh_Hans_CN")
         << QLocale(QLocale::Chinese, QLocale::SimplifiedHanScript, QLocale::China)
@@ -4143,6 +4146,9 @@ void tst_QLocale::mySystemLocale_data()
     QTest::addRow("chinese-full")
         << QString("zh-Hans-CN") << QLocale::Chinese
         << QStringList{QStringLiteral("zh-Hans-CN"), QStringLiteral("zh-CN"), QStringLiteral("zh")};
+    QTest::addRow("chinese-taiwan")
+        << u"zh-TW"_s << QLocale::Chinese
+        << QStringList{u"zh-TW"_s, u"zh-Hant-TW"_s};
 
     // For C, it should preserve what the system gave us but only add "C", never anything more:
     QTest::addRow("C") << QString("C") << QLocale::C << QStringList{QStringLiteral("C")};