diff --git a/src/corelib/text/qlocale.cpp b/src/corelib/text/qlocale.cpp
index de71916ea81..12af8dc3082 100644
--- a/src/corelib/text/qlocale.cpp
+++ b/src/corelib/text/qlocale.cpp
@@ -484,6 +484,16 @@ static qsizetype findLocaleIndexById(QLocaleId localeId) noexcept
     return -1;
 }
 
+static constexpr qsizetype locale_data_size = q20::ssize(locale_data) - 1; // trailing guard
+bool QLocaleData::allLocaleDataRows(bool (*check)(qsizetype, const QLocaleData &))
+{
+    for (qsizetype index = 0; index < locale_data_size; ++index) {
+        if (!(*check)(index, locale_data[index]))
+            return false;
+    }
+    return true;
+}
+
 qsizetype QLocaleData::findLocaleIndex(QLocaleId lid) noexcept
 {
     QLocaleId localeId = lid;
@@ -875,8 +885,6 @@ QDataStream &operator>>(QDataStream &ds, QLocale &l)
 }
 #endif // QT_NO_DATASTREAM
 
-static constexpr qsizetype locale_data_size = q20::ssize(locale_data) - 1; // trailing guard
-
 Q_GLOBAL_STATIC(QSharedDataPointer<QLocalePrivate>, defaultLocalePrivate,
                 new QLocalePrivate(defaultData(), defaultIndex()))
 
diff --git a/src/corelib/text/qlocale_p.h b/src/corelib/text/qlocale_p.h
index ee65076780b..2141c6f277b 100644
--- a/src/corelib/text/qlocale_p.h
+++ b/src/corelib/text/qlocale_p.h
@@ -246,6 +246,8 @@ public:
     // data, e.g. calendar locales, as well as the main CLDR-derived data.
     [[nodiscard]] static qsizetype findLocaleIndex(QLocaleId localeId) noexcept;
     [[nodiscard]] static const QLocaleData *c() noexcept;
+    [[nodiscard]] Q_AUTOTEST_EXPORT
+    static bool allLocaleDataRows(bool (*check)(qsizetype, const QLocaleData &));
 
     enum DoubleForm {
         DFExponent = 0,
diff --git a/tests/auto/corelib/text/qlocale/tst_qlocale.cpp b/tests/auto/corelib/text/qlocale/tst_qlocale.cpp
index 0047ed1ad08..cf46889b39f 100644
--- a/tests/auto/corelib/text/qlocale/tst_qlocale.cpp
+++ b/tests/auto/corelib/text/qlocale/tst_qlocale.cpp
@@ -3064,10 +3064,9 @@ void tst_QLocale::negativeNumbers()
     QT_TEST_EQUALITY_OPS(egypt, farsi, false);
 }
 
+#ifdef QT_BUILD_INTERNAL
 #include <private/qlocale_p.h>
-#include <private/qlocale_data_p.h>
-
-static const int locale_data_count = sizeof(locale_data)/sizeof(locale_data[0]);
+#endif
 
 void tst_QLocale::testNames_data()
 {
@@ -3076,16 +3075,21 @@ void tst_QLocale::testNames_data()
 
     QLocale::setDefault(QLocale(QLocale::C)); // Ensures predictable fall-backs
 
-    for (int i = 0; i < locale_data_count; ++i) {
-        const QLocaleData &item = locale_data[i];
+#ifdef QT_BUILD_INTERNAL
+    bool ok = QLocaleData::allLocaleDataRows([](qsizetype index, const QLocaleData &item) {
         const QByteArray lang =
                 QLocale::languageToString(QLocale::Language(item.m_language_id)).toUtf8();
         const QByteArray land =
                 QLocale::territoryToString(QLocale::Territory(item.m_territory_id)).toUtf8();
 
-        QTest::addRow("data_%d (%s/%s)", i, lang.constData(), land.constData())
+        QTest::addRow("data_%d (%s/%s)", int(index), lang.constData(), land.constData())
                 << QLocale::Language(item.m_language_id) << QLocale::Territory(item.m_territory_id);
-    }
+        return true;
+    });
+    QVERIFY(ok);
+#else
+    QSKIP("Only internal builds can access the data to set up this test");
+#endif // QT_BUILD_INTERNAL
 }
 
 void tst_QLocale::testNames()