diff --git a/src/corelib/plugin/qfactoryloader.cpp b/src/corelib/plugin/qfactoryloader.cpp
index c2221d362f..7e4a9f06fd 100644
--- a/src/corelib/plugin/qfactoryloader.cpp
+++ b/src/corelib/plugin/qfactoryloader.cpp
@@ -126,8 +126,6 @@ static QJsonDocument jsonFromCborMetaData(const char *raw, qsizetype size, QStri
     return QJsonDocument(o);
 }
 
-QT_WARNING_PUSH
-QT_WARNING_DISABLE_DEPRECATED
 QJsonDocument qJsonFromRawLibraryMetaData(const char *raw, qsizetype sectionSize, QString *errMsg)
 {
     raw += metaDataSignatureLength();
@@ -135,7 +133,6 @@ QJsonDocument qJsonFromRawLibraryMetaData(const char *raw, qsizetype sectionSize
 
     return jsonFromCborMetaData(raw, sectionSize, errMsg);
 }
-QT_WARNING_POP
 
 class QFactoryLoaderPrivate : public QObjectPrivate
 {
diff --git a/tests/auto/corelib/plugin/qplugin/tst_qplugin.cpp b/tests/auto/corelib/plugin/qplugin/tst_qplugin.cpp
index 97ec9664ec..8b221dfc7a 100644
--- a/tests/auto/corelib/plugin/qplugin/tst_qplugin.cpp
+++ b/tests/auto/corelib/plugin/qplugin/tst_qplugin.cpp
@@ -137,43 +137,6 @@ void tst_QPlugin::scanInvalidPlugin_data()
     QTest::addColumn<bool>("loads");
     QTest::addColumn<QString>("errMsg");
 
-#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
-    // Binary JSON metadata
-    QByteArray prefix = "QTMETADATA  ";
-
-    {
-        QJsonObject obj;
-        obj.insert("IID", "org.qt-project.tst_qplugin");
-        obj.insert("className", "tst");
-        obj.insert("version", int(QT_VERSION));
-#ifdef QT_NO_DEBUG
-        obj.insert("debug", false);
-#else
-        obj.insert("debug", true);
-#endif
-        obj.insert("MetaData", QJsonObject());
-        QTest::newRow("json-control") << (prefix + QJsonDocument(obj).toBinaryData()) << true << "";
-    }
-
-    QTest::newRow("json-zeroes") << prefix << false << " ";
-
-    prefix += "qbjs";
-    QTest::newRow("bad-json-version0") << prefix << false << " ";
-    QTest::newRow("bad-json-version2") << (prefix + QByteArray("\2\0\0\0", 4)) << false << " ";
-
-    // valid qbjs version 1
-    prefix += QByteArray("\1\0\0\0");
-
-    // too large for the file (100 MB)
-    QTest::newRow("bad-json-size-large1") << (prefix + QByteArray("\0\0\x40\x06")) << false << " ";
-
-    // too large for binary JSON (512 MB)
-    QTest::newRow("bad-json-size-large2") << (prefix + QByteArray("\0\0\0\x20")) << false << " ";
-
-    // could overflow
-    QTest::newRow("bad-json-size-large3") << (prefix + "\xff\xff\xff\x7f") << false << " ";
-#endif
-
     // CBOR metadata
     QByteArray cprefix = "QTMETADATA !1234";
     cprefix[12] = 0; // current version