diff --git a/src/corelib/io/qdatastream.cpp b/src/corelib/io/qdatastream.cpp
index 5dad9bd9f9f..614910a9d68 100644
--- a/src/corelib/io/qdatastream.cpp
+++ b/src/corelib/io/qdatastream.cpp
@@ -250,7 +250,7 @@ QT_BEGIN_NAMESPACE
         return retVal;
 
 enum {
-    DefaultStreamVersion = QDataStream::Qt_4_6
+    DefaultStreamVersion = QDataStream::Qt_5_0
 };
 
 // ### 5.0: when streaming invalid QVariants, just the type should
diff --git a/src/corelib/io/qdatastream.h b/src/corelib/io/qdatastream.h
index ca10304b301..818e3044d1d 100644
--- a/src/corelib/io/qdatastream.h
+++ b/src/corelib/io/qdatastream.h
@@ -87,7 +87,7 @@ public:
         Qt_4_7 = Qt_4_6,
         Qt_4_8 = Qt_4_7,
         Qt_4_9 = Qt_4_8,
-        Qt_5_0 = Qt_4_8
+        Qt_5_0 = 13
 #if QT_VERSION >= 0x050100
 #error Add the datastream version for this Qt version
 #endif
diff --git a/src/corelib/kernel/qmetatype.cpp b/src/corelib/kernel/qmetatype.cpp
index 1c106f4f368..e5fd8a5d247 100644
--- a/src/corelib/kernel/qmetatype.cpp
+++ b/src/corelib/kernel/qmetatype.cpp
@@ -228,14 +228,13 @@ template<> struct TypeDefiniton<QRegExp> { static const bool IsAvailable = false
 
     \value User  Base value for user types
 
-    \omitvalue FirstCoreExtType
     \omitvalue FirstGuiType
     \omitvalue FirstWidgetsType
-    \omitvalue LastCoreExtType
     \omitvalue LastCoreType
     \omitvalue LastGuiType
     \omitvalue LastWidgetsType
     \omitvalue QReal
+    \omitvalue HighestInternalId
 
     Additional types can be registered using Q_DECLARE_METATYPE().
 
@@ -362,10 +361,10 @@ const char *QMetaType::typeName(int type)
     // In theory it can be filled during compilation time, but for some reason template code
     // that is able to do it causes GCC 4.6 to generate additional 3K of executable code. Probably
     // it is not worth of it.
-    static const char *namesCache[QMetaType::LastCoreExtType + 1];
+    static const char *namesCache[QMetaType::HighestInternalId + 1];
 
     const char *result;
-    if (type <= QMetaType::LastCoreExtType && ((result = namesCache[type])))
+    if (type <= QMetaType::HighestInternalId && ((result = namesCache[type])))
         return result;
 
 #define QT_METATYPE_TYPEID_TYPENAME_CONVERTER(MetaTypeName, TypeId, RealName) \
@@ -388,7 +387,7 @@ const char *QMetaType::typeName(int type)
     }
 #undef QT_METATYPE_TYPEID_TYPENAME_CONVERTER
 
-    Q_ASSERT(type <= QMetaType::LastCoreExtType);
+    Q_ASSERT(type <= QMetaType::HighestInternalId);
     namesCache[type] = result;
     return result;
 }
diff --git a/src/corelib/kernel/qmetatype.h b/src/corelib/kernel/qmetatype.h
index 5a55ca9bd7b..bbe482428f5 100644
--- a/src/corelib/kernel/qmetatype.h
+++ b/src/corelib/kernel/qmetatype.h
@@ -65,16 +65,16 @@ QT_BEGIN_NAMESPACE
     F(LongLong, 4, qlonglong) \
     F(ULongLong, 5, qulonglong) \
     F(Double, 6, double) \
-    F(Long, 129, long) \
-    F(Short, 130, short) \
-    F(Char, 131, char) \
-    F(ULong, 132, ulong) \
-    F(UShort, 133, ushort) \
-    F(UChar, 134, uchar) \
-    F(Float, 135, float) \
+    F(Long, 32, long) \
+    F(Short, 33, short) \
+    F(Char, 34, char) \
+    F(ULong, 35, ulong) \
+    F(UShort, 36, ushort) \
+    F(UChar, 37, uchar) \
+    F(Float, 38, float) \
 
 #define QT_FOR_EACH_STATIC_PRIMITIVE_POINTER(F)\
-    F(VoidStar, 128, void*) \
+    F(VoidStar, 31, void*) \
 
 #define QT_FOR_EACH_STATIC_CORE_CLASS(F)\
     F(QChar, 7, QChar) \
@@ -98,12 +98,12 @@ QT_BEGIN_NAMESPACE
     F(QRegExp, 27, QRegExp) \
     F(QEasingCurve, 29, QEasingCurve) \
     F(QUuid, 30, QUuid) \
-    F(QModelIndex, 31, QModelIndex) \
-    F(QVariant, 138, QVariant) \
+    F(QVariant, 41, QVariant) \
+    F(QModelIndex, 42, QModelIndex) \
 
 #define QT_FOR_EACH_STATIC_CORE_POINTER(F)\
-    F(QObjectStar, 136, QObject*) \
-    F(QWidgetStar, 137, QWidget*) \
+    F(QObjectStar, 39, QObject*) \
+    F(QWidgetStar, 40, QWidget*) \
 
 #define QT_FOR_EACH_STATIC_CORE_TEMPLATE(F)\
     F(QVariantMap, 8, QVariantMap) \
@@ -188,8 +188,7 @@ public:
         LastGuiType = QPolygonF,
         FirstWidgetsType = QIcon,
         LastWidgetsType = QSizePolicy,
-        FirstCoreExtType = VoidStar,
-        LastCoreExtType = QVariant,
+        HighestInternalId = LastWidgetsType,
 
 // This logic must match the one in qglobal.h
 #if defined(QT_COORD_TYPE)
diff --git a/src/corelib/kernel/qmetatype_p.h b/src/corelib/kernel/qmetatype_p.h
index e7a7ed80198..45768bb3b96 100644
--- a/src/corelib/kernel/qmetatype_p.h
+++ b/src/corelib/kernel/qmetatype_p.h
@@ -68,8 +68,6 @@ static inline int moduleForType(const int typeId)
         return Gui;
     if (typeId <= QMetaType::LastWidgetsType)
         return Widgets;
-    if (typeId <= QMetaType::LastCoreExtType)
-        return Core;
     return Unknown;
 }
 }
diff --git a/src/corelib/kernel/qvariant.cpp b/src/corelib/kernel/qvariant.cpp
index e0d1114622d..c14e6ffd17a 100644
--- a/src/corelib/kernel/qvariant.cpp
+++ b/src/corelib/kernel/qvariant.cpp
@@ -1625,7 +1625,7 @@ QVariant::Type QVariant::nameToType(const char *name)
 
 #ifndef QT_NO_DATASTREAM
 enum { MapFromThreeCount = 36 };
-static const ushort map_from_three[MapFromThreeCount] =
+static const ushort mapIdFromQt3ToCurrent[MapFromThreeCount] =
 {
     QVariant::Invalid,
     QVariant::Map,
@@ -1675,26 +1675,45 @@ void QVariant::load(QDataStream &s)
 {
     clear();
 
-    quint32 u;
-    s >> u;
+    quint32 typeId;
+    s >> typeId;
     if (s.version() < QDataStream::Qt_4_0) {
-        if (u >= MapFromThreeCount)
+        if (typeId >= MapFromThreeCount)
             return;
-        u = map_from_three[u];
+        typeId = mapIdFromQt3ToCurrent[typeId];
+    } else if (s.version() < QDataStream::Qt_5_0) {
+        if (typeId >= 128 && typeId != QVariant::UserType) {
+            // In Qt4 id == 128 was FirstExtCoreType. In Qt5 ExtCoreTypes set was merged to CoreTypes
+            // by moving all ids down by 97.
+            typeId -= 97;
+        } else if (typeId == 69 /* QIcon */) {
+            // In Qt5 after modularization project this types where moved to a separate module (and ids were downgraded)
+            typeId = QMetaType::QIcon;
+        } else if (typeId == 75 /* QSizePolicy */) {
+            typeId = QMetaType::QSizePolicy;
+        } else if (typeId >= 70) {
+            // and as a result this types recieved lower ids too
+            if (typeId <= 74) { // QImage QPolygon QRegion QBitmap QCursor
+                typeId -=1;
+            } else if (typeId <= 86) { // QKeySequence QPen QTextLength QTextFormat QMatrix QTransform QMatrix4x4 QVector2D QVector3D QVector4D QQuaternion
+                typeId -=2;
+            }
+        }
     }
+
     qint8 is_null = false;
     if (s.version() >= QDataStream::Qt_4_2)
         s >> is_null;
-    if (u == QVariant::UserType) {
+    if (typeId == QVariant::UserType) {
         QByteArray name;
         s >> name;
-        u = QMetaType::type(name);
-        if (!u) {
+        typeId = QMetaType::type(name);
+        if (!typeId) {
             s.setStatus(QDataStream::ReadCorruptData);
             return;
         }
     }
-    create(static_cast<int>(u), 0);
+    create(static_cast<int>(typeId), 0);
     d.is_null = is_null;
 
     if (!isValid()) {
@@ -1720,12 +1739,12 @@ void QVariant::load(QDataStream &s)
 */
 void QVariant::save(QDataStream &s) const
 {
-    quint32 tp = type();
+    quint32 typeId = type();
     if (s.version() < QDataStream::Qt_4_0) {
         int i;
         for (i = MapFromThreeCount - 1; i >= 0; i--) {
-            if (map_from_three[i] == tp) {
-                tp = i;
+            if (mapIdFromQt3ToCurrent[i] == typeId) {
+                typeId = i;
                 break;
             }
         }
@@ -1733,11 +1752,29 @@ void QVariant::save(QDataStream &s) const
             s << QVariant();
             return;
         }
+    } else if (s.version() < QDataStream::Qt_5_0) {
+        if (typeId >= 128 - 97 && typeId <= LastCoreType) {
+            // In Qt4 id == 128 was FirstExtCoreType. In Qt5 ExtCoreTypes set was merged to CoreTypes
+            // by moving all ids down by 97.
+            typeId += 97;
+        } else if (typeId == QMetaType::QIcon) {
+            // In Qt5 after modularization project this types where moved to a separate module (and ids were downgraded)
+            typeId = 69;
+        } else if (typeId == QMetaType::QSizePolicy) {
+            typeId = 75;
+        } else if (typeId >= QMetaType::QImage) {
+            // and as a result this types recieved lower ids too
+            if (typeId <= QMetaType::QCursor) {
+                typeId +=1;
+            } else if (typeId <= QMetaType::QQuaternion) {
+                typeId +=2;
+            }
+        }
     }
-    s << tp;
+    s << typeId;
     if (s.version() >= QDataStream::Qt_4_2)
         s << qint8(d.is_null);
-    if (tp == QVariant::UserType) {
+    if (typeId == QVariant::UserType) {
         s << QMetaType::typeName(userType());
     }
 
@@ -2411,17 +2448,15 @@ static const quint32 qCanConvertMatrix[QVariant::LastCoreType + 1] =
 */
 bool QVariant::canConvert(Type t) const
 {
-    //we can treat floats as double
-    //the reason for not doing it the "proper" way is that QMetaType::Float's value is 135,
-    //which can't be handled by qCanConvertMatrix
-    //In addition QVariant::Type doesn't have a Float value, so we're using QMetaType::Float
+    // TODO Reimplement this function, currently it works but it is a historical mess.
     const uint currentType = ((d.type == QMetaType::Float) ? QVariant::Double : d.type);
     if (uint(t) == uint(QMetaType::Float)) t = QVariant::Double;
 
     if (currentType == uint(t))
         return true;
 
-    if (currentType > QVariant::LastCoreType || t > QVariant::LastCoreType) {
+    // FIXME It should be LastCoreType intead of Uuid
+    if (currentType > QVariant::Uuid || t > QVariant::Uuid) {
         switch (uint(t)) {
         case QVariant::Int:
             return currentType == QVariant::KeySequence
diff --git a/tests/auto/corelib/io/qdatastream/tst_qdatastream.cpp b/tests/auto/corelib/io/qdatastream/tst_qdatastream.cpp
index 4f39af93ed0..6aff1435587 100644
--- a/tests/auto/corelib/io/qdatastream/tst_qdatastream.cpp
+++ b/tests/auto/corelib/io/qdatastream/tst_qdatastream.cpp
@@ -255,7 +255,8 @@ static int NColorRoles[] = {
     QPalette::ToolTipText + 1,     // Qt_4_4
     QPalette::ToolTipText + 1,     // Qt_4_5
     QPalette::ToolTipText + 1,     // Qt_4_6
-    0                              // add the correct value for Qt_4_7 here later
+    QPalette::ToolTipText + 1,     // Qt_5_0
+    0                              // add the correct value for Qt_5_1 here later
 };
 
 // Testing get/set functions
diff --git a/tests/auto/corelib/kernel/qvariant/qvariant.pro b/tests/auto/corelib/kernel/qvariant/qvariant.pro
index 93877a1059f..48229ee140b 100644
--- a/tests/auto/corelib/kernel/qvariant/qvariant.pro
+++ b/tests/auto/corelib/kernel/qvariant/qvariant.pro
@@ -2,5 +2,6 @@ CONFIG += testcase
 TARGET = tst_qvariant
 QT += widgets network testlib
 SOURCES = tst_qvariant.cpp
+RESOURCES += qvariant.qrc
 
 mac: CONFIG += insignificant_test # QTBUG-QTBUG-22747
diff --git a/tests/auto/corelib/kernel/qvariant/qvariant.qrc b/tests/auto/corelib/kernel/qvariant/qvariant.qrc
new file mode 100644
index 00000000000..e6f7bdac809
--- /dev/null
+++ b/tests/auto/corelib/kernel/qvariant/qvariant.qrc
@@ -0,0 +1,6 @@
+<!DOCTYPE RCC><RCC version="1.0">
+<qresource>
+    <file>stream/qt4.9/</file>
+    <file>stream/qt5.0/</file>
+</qresource>
+</RCC>
diff --git a/tests/auto/corelib/kernel/qvariant/stream/qt4.9/bool.bin b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/bool.bin
new file mode 100644
index 00000000000..7929cb41298
Binary files /dev/null and b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/bool.bin differ
diff --git a/tests/auto/corelib/kernel/qvariant/stream/qt4.9/char.bin b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/char.bin
new file mode 100644
index 00000000000..3c15cb78507
Binary files /dev/null and b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/char.bin differ
diff --git a/tests/auto/corelib/kernel/qvariant/stream/qt4.9/double.bin b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/double.bin
new file mode 100644
index 00000000000..ac9ed179f2a
Binary files /dev/null and b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/double.bin differ
diff --git a/tests/auto/corelib/kernel/qvariant/stream/qt4.9/float.bin b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/float.bin
new file mode 100644
index 00000000000..540c010dc97
Binary files /dev/null and b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/float.bin differ
diff --git a/tests/auto/corelib/kernel/qvariant/stream/qt4.9/int.bin b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/int.bin
new file mode 100644
index 00000000000..6b47a9aeb4e
Binary files /dev/null and b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/int.bin differ
diff --git a/tests/auto/corelib/kernel/qvariant/stream/qt4.9/long.bin b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/long.bin
new file mode 100644
index 00000000000..66891d5ed8b
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diff --git a/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qbitarray.bin b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qbitarray.bin
new file mode 100644
index 00000000000..e5341746515
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diff --git a/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qbitmap.bin b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qbitmap.bin
new file mode 100644
index 00000000000..13f4dc374dd
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diff --git a/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qbrush.bin b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qbrush.bin
new file mode 100644
index 00000000000..60ea8a2b089
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diff --git a/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qbytearray.bin b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qbytearray.bin
new file mode 100644
index 00000000000..19897811d01
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diff --git a/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qchar.bin b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qchar.bin
new file mode 100644
index 00000000000..f4ef9df7946
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diff --git a/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qcolor.bin b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qcolor.bin
new file mode 100644
index 00000000000..ba1c332e149
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diff --git a/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qcursor.bin b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qcursor.bin
new file mode 100644
index 00000000000..545fa96a1f3
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diff --git a/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qdate.bin b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qdate.bin
new file mode 100644
index 00000000000..d3281b13363
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diff --git a/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qdatetime.bin b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qdatetime.bin
new file mode 100644
index 00000000000..664eb736a73
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diff --git a/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qeasingcurve.bin b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qeasingcurve.bin
new file mode 100644
index 00000000000..b9b9ea633bd
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diff --git a/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qfont.bin b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qfont.bin
new file mode 100644
index 00000000000..76bc5d932fc
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diff --git a/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qicon.bin b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qicon.bin
new file mode 100644
index 00000000000..2f8713244c1
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diff --git a/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qimage.bin b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qimage.bin
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index 00000000000..0ab1cbf6fa3
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diff --git a/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qkeysequence.bin b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qkeysequence.bin
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index 00000000000..03db168e93b
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diff --git a/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qline.bin b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qline.bin
new file mode 100644
index 00000000000..f1f5cde63ce
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diff --git a/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qlinef.bin b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qlinef.bin
new file mode 100644
index 00000000000..4b1c2f05fbe
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diff --git a/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qlocale.bin b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qlocale.bin
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index 00000000000..44d9d1c993f
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diff --git a/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qlonglong.bin b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qlonglong.bin
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index 00000000000..f1c297a91de
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diff --git a/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qmatrix.bin b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qmatrix.bin
new file mode 100644
index 00000000000..fc88e2564a2
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diff --git a/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qmatrix4x4.bin b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qmatrix4x4.bin
new file mode 100644
index 00000000000..3a8b664a693
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diff --git a/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qpalette.bin b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qpalette.bin
new file mode 100644
index 00000000000..1ad94631bd5
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diff --git a/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qpen.bin b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qpen.bin
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index 00000000000..1eff5c83adb
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diff --git a/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qpixmap.bin b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qpixmap.bin
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index 00000000000..ce9cb8c4346
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diff --git a/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qpoint.bin b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qpoint.bin
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index 00000000000..ca66b1ec4c7
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diff --git a/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qpointf.bin b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qpointf.bin
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index 00000000000..7aebb462997
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diff --git a/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qpolygon.bin b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qpolygon.bin
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index 00000000000..fbdab8fffc1
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diff --git a/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qquaternion.bin b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qquaternion.bin
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index 00000000000..01ee6dcdbc2
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diff --git a/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qrect.bin b/tests/auto/corelib/kernel/qvariant/stream/qt4.9/qrect.bin
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diff --git a/tests/auto/corelib/kernel/qvariant/stream/qt5.0/ushort.bin b/tests/auto/corelib/kernel/qvariant/stream/qt5.0/ushort.bin
new file mode 100644
index 00000000000..25cb14e173f
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diff --git a/tests/auto/corelib/kernel/qvariant/stream/qt5.0/void.bin b/tests/auto/corelib/kernel/qvariant/stream/qt5.0/void.bin
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diff --git a/tests/auto/corelib/kernel/qvariant/tst_qvariant.cpp b/tests/auto/corelib/kernel/qvariant/tst_qvariant.cpp
index f40b1eae0b7..f88e7951675 100644
--- a/tests/auto/corelib/kernel/qvariant/tst_qvariant.cpp
+++ b/tests/auto/corelib/kernel/qvariant/tst_qvariant.cpp
@@ -262,6 +262,19 @@ private slots:
     void forwardDeclare();
     void debugStream_data();
     void debugStream();
+
+    void loadQt4Stream_data();
+    void loadQt4Stream();
+    void saveQt4Stream_data();
+    void saveQt4Stream();
+    void loadQt5Stream_data();
+    void loadQt5Stream();
+    void saveQt5Stream_data();
+    void saveQt5Stream();
+private:
+    void dataStream_data(QDataStream::Version version);
+    void loadQVariantFromDataStream(QDataStream::Version version);
+    void saveQVariantFromDataStream(QDataStream::Version version);
 };
 
 Q_DECLARE_METATYPE(QDate)
@@ -2002,13 +2015,6 @@ Q_DECLARE_METATYPE(MyType*)
 
 void tst_QVariant::userType()
 {
-    {
-        QVariant userVariant(QVariant::UserType);
-
-        QVERIFY(userVariant.isValid());
-        QVERIFY(userVariant.isNull());
-    }
-
     {
         MyType data(1, "eins");
         MyType data2(2, "zwei");
@@ -3338,6 +3344,123 @@ void tst_QVariant::forwardDeclare()
     QCOMPARE(qvariant_cast<Forward*>(v), f);
 }
 
+void tst_QVariant::loadQt5Stream_data()
+{
+    dataStream_data(QDataStream::Qt_5_0);
+}
+
+void tst_QVariant::loadQt5Stream()
+{
+    loadQVariantFromDataStream(QDataStream::Qt_5_0);
+}
+
+void tst_QVariant::saveQt5Stream_data()
+{
+    dataStream_data(QDataStream::Qt_5_0);
+}
+
+void tst_QVariant::saveQt5Stream()
+{
+    saveQVariantFromDataStream(QDataStream::Qt_5_0);
+}
+
+void tst_QVariant::loadQt4Stream_data()
+{
+    dataStream_data(QDataStream::Qt_4_9);
+}
+
+void tst_QVariant::loadQt4Stream()
+{
+    loadQVariantFromDataStream(QDataStream::Qt_4_9);
+}
+
+void tst_QVariant::saveQt4Stream_data()
+{
+    dataStream_data(QDataStream::Qt_4_9);
+}
+
+void tst_QVariant::saveQt4Stream()
+{
+    saveQVariantFromDataStream(QDataStream::Qt_4_9);
+}
+
+void tst_QVariant::dataStream_data(QDataStream::Version version)
+{
+    QTest::addColumn<QString>("fileName");
+
+    QString path;
+    switch (version) {
+    case QDataStream::Qt_4_9:
+        path = QString::fromLatin1("qt4.9");
+        break;
+    case QDataStream::Qt_5_0:
+        path = QString::fromLatin1("qt5.0");
+        break;
+    default:
+        Q_UNIMPLEMENTED();
+    }
+
+    path = path.prepend(":/stream/").append("/");
+    QDir dir(path);
+    uint i = 0;
+    foreach (const QFileInfo &fileInfo, dir.entryInfoList(QStringList() << "*.bin")) {
+        QTest::newRow((path + fileInfo.fileName()).toLatin1()) << fileInfo.filePath();
+        i += 1;
+    }
+    QVERIFY(i > 10);
+}
+
+void tst_QVariant::loadQVariantFromDataStream(QDataStream::Version version)
+{
+    QFETCH(QString, fileName);
+
+    QFile file(fileName);
+    QVERIFY(file.open(QIODevice::ReadOnly));
+
+    QDataStream stream(&file);
+    stream.setVersion(version);
+
+    QString typeName;
+    QVariant loadedVariant;
+    stream >> typeName >> loadedVariant;
+
+    const int id = QMetaType::type(typeName.toLatin1());
+    QVariant constructedVariant(static_cast<QVariant::Type>(id));
+    QCOMPARE(constructedVariant.userType(), id);
+    QCOMPARE(QMetaType::typeName(loadedVariant.userType()), typeName.toLatin1().constData());
+    QCOMPARE(loadedVariant.userType(), constructedVariant.userType());
+}
+
+void tst_QVariant::saveQVariantFromDataStream(QDataStream::Version version)
+{
+    QFETCH(QString, fileName);
+
+    QFile file(fileName);
+    QVERIFY(file.open(QIODevice::ReadOnly));
+    QDataStream dataFileStream(&file);
+
+    QString typeName;
+    dataFileStream >> typeName;
+    QByteArray data = file.readAll();
+    const int id = QMetaType::type(typeName.toLatin1());
+
+    QBuffer buffer;
+    buffer.open(QIODevice::ReadWrite);
+    QDataStream stream(&buffer);
+    stream.setVersion(version);
+
+    QVariant constructedVariant(static_cast<QVariant::Type>(id));
+    QCOMPARE(constructedVariant.userType(), id);
+    stream << constructedVariant;
+
+    // We are testing QVariant there is no point in testing full array.
+    QCOMPARE(buffer.data().left(5), data.left(5));
+
+    buffer.seek(0);
+    QVariant recunstructedVariant;
+    stream >> recunstructedVariant;
+    QCOMPARE(recunstructedVariant.userType(), constructedVariant.userType());
+}
 
 class MessageHandler {
 public:
@@ -3397,6 +3520,5 @@ void tst_QVariant::debugStream()
     QVERIFY(msgHandler.testPassed());
 }
 
-
 QTEST_MAIN(tst_QVariant)
 #include "tst_qvariant.moc"
diff --git a/tests/benchmarks/corelib/kernel/qmetatype/tst_qmetatype.cpp b/tests/benchmarks/corelib/kernel/qmetatype/tst_qmetatype.cpp
index 2faacc2372f..558604ea613 100644
--- a/tests/benchmarks/corelib/kernel/qmetatype/tst_qmetatype.cpp
+++ b/tests/benchmarks/corelib/kernel/qmetatype/tst_qmetatype.cpp
@@ -242,8 +242,6 @@ void tst_QMetaType::constructCoreType_data()
     QTest::addColumn<int>("typeId");
     for (int i = 0; i <= QMetaType::LastCoreType; ++i)
         QTest::newRow(QMetaType::typeName(i)) << i;
-    for (int i = QMetaType::FirstCoreExtType; i <= QMetaType::LastCoreExtType; ++i)
-        QTest::newRow(QMetaType::typeName(i)) << i;
     // GUI types are tested in tst_QGuiMetaType.
 }
 
diff --git a/tests/benchmarks/corelib/kernel/qvariant/tst_qvariant.cpp b/tests/benchmarks/corelib/kernel/qvariant/tst_qvariant.cpp
index 8f0a331c807..52999c170c1 100644
--- a/tests/benchmarks/corelib/kernel/qvariant/tst_qvariant.cpp
+++ b/tests/benchmarks/corelib/kernel/qvariant/tst_qvariant.cpp
@@ -307,8 +307,6 @@ void tst_qvariant::createCoreType_data()
     QTest::addColumn<int>("typeId");
     for (int i = 0; i <= QMetaType::LastCoreType; ++i)
         QTest::newRow(QMetaType::typeName(i)) << i;
-    for (int i = QMetaType::FirstCoreExtType; i <= QMetaType::LastCoreExtType; ++i)
-        QTest::newRow(QMetaType::typeName(i)) << i;
 }
 
 // Tests how fast a Qt core type can be default-constructed by a