init variables where they are declared when possible (clang-tidy)

clang-tidy -p compile_commands.json $file -checks='-*,modernize-use-default-member-init,readability-redundant-member-init'
 -config='{CheckOptions: [{key: modernize-use-default-member-init.UseAssignment, value: "1"}]}' -header-filter='qtdeclarative' -fix

Change-Id: I705f3235ff129ba68b0d8dad54a083e29fcead5f
Reviewed-by: Johan Helsing <johan.helsing@qt.io>

23 files changed, 94 insertions, 140 deletions

diff --git a/tests/auto/qml/animation/qabstractanimationjob/tst_qabstractanimationjob.cpp b/tests/auto/qml/animation/qabstractanimationjob/tst_qabstractanimationjob.cpp
index c81fd37f07..7e19e925b6 100644
--- a/tests/auto/qml/animation/qabstractanimationjob/tst_qabstractanimationjob.cpp
+++ b/tests/auto/qml/animation/qabstractanimationjob/tst_qabstractanimationjob.cpp
@@ -53,7 +53,7 @@ private slots:
 class TestableQAbstractAnimation : public QAbstractAnimationJob
 {
 public:
-    TestableQAbstractAnimation() : m_duration(10) {}
+    TestableQAbstractAnimation() {}
     virtual ~TestableQAbstractAnimation() {};
 
     int duration() const { return m_duration; }
@@ -61,7 +61,7 @@ public:
 
     void setDuration(int duration) { m_duration = duration; }
 private:
-    int m_duration;
+    int m_duration = 10;
 };
 
 class DummyQAnimationGroup : public QAnimationGroupJob
diff --git a/tests/auto/qml/animation/qanimationgroupjob/tst_qanimationgroupjob.cpp b/tests/auto/qml/animation/qanimationgroupjob/tst_qanimationgroupjob.cpp
index b7f8280c5b..974357dc8e 100644
--- a/tests/auto/qml/animation/qanimationgroupjob/tst_qanimationgroupjob.cpp
+++ b/tests/auto/qml/animation/qanimationgroupjob/tst_qanimationgroupjob.cpp
@@ -71,10 +71,7 @@ class UncontrolledAnimation : public QObject, public QAbstractAnimationJob
 {
     Q_OBJECT
 public:
-    UncontrolledAnimation()
-        : id(0)
-    {
-    }
+    UncontrolledAnimation() { }
 
     int duration() const { return -1; /* not time driven */ }
 
@@ -96,7 +93,7 @@ protected:
     }
 
 private:
-    int id;
+    int id = 0;
 };
 
 class StateChangeListener: public QAnimationJobChangeListener
diff --git a/tests/auto/qml/animation/qparallelanimationgroupjob/tst_qparallelanimationgroupjob.cpp b/tests/auto/qml/animation/qparallelanimationgroupjob/tst_qparallelanimationgroupjob.cpp
index bb7e50dbbd..a8bcadbc84 100644
--- a/tests/auto/qml/animation/qparallelanimationgroupjob/tst_qparallelanimationgroupjob.cpp
+++ b/tests/auto/qml/animation/qparallelanimationgroupjob/tst_qparallelanimationgroupjob.cpp
@@ -89,7 +89,6 @@ class UncontrolledAnimation : public QObject, public QAbstractAnimationJob
     Q_OBJECT
 public:
     UncontrolledAnimation()
-        : id(0)
     {
     }
 
@@ -113,7 +112,7 @@ protected:
     }
 
 private:
-    int id;
+    int id = 0;
 };
 
 class StateChangeListener: public QAnimationJobChangeListener
@@ -133,14 +132,14 @@ public:
 class FinishedListener: public QAnimationJobChangeListener
 {
 public:
-    FinishedListener() : m_count(0) {}
+    FinishedListener() {}
 
     virtual void animationFinished(QAbstractAnimationJob *) { ++m_count; }
     void clear() { m_count = 0; }
     int count() { return m_count; }
 
 private:
-    int m_count;
+    int m_count = 0;
 };
 
 void tst_QParallelAnimationGroupJob::setCurrentTime()
@@ -685,10 +684,10 @@ void tst_QParallelAnimationGroupJob::stopUncontrolledAnimations()
 }
 
 struct AnimState {
-    AnimState(int time = -1) : time(time), state(-1) {}
+    AnimState(int time = -1) : time(time) {}
     AnimState(int time, int state) : time(time), state(state) {}
     int time;
-    int state;
+    int state = -1;
 };
 
 #define Running QAbstractAnimationJob::Running
diff --git a/tests/auto/qml/animation/qpauseanimationjob/tst_qpauseanimationjob.cpp b/tests/auto/qml/animation/qpauseanimationjob/tst_qpauseanimationjob.cpp
index ff295c5409..8f6b6a2ab7 100644
--- a/tests/auto/qml/animation/qpauseanimationjob/tst_qpauseanimationjob.cpp
+++ b/tests/auto/qml/animation/qpauseanimationjob/tst_qpauseanimationjob.cpp
@@ -39,17 +39,14 @@ static const char winTimerError[] = "On windows, consistent timing is not workin
 class TestablePauseAnimation : public QPauseAnimationJob
 {
 public:
-    TestablePauseAnimation()
-        : m_updateCurrentTimeCount(0)
-    {
-    }
+    TestablePauseAnimation() { }
 
     TestablePauseAnimation(int duration)
         : QPauseAnimationJob(duration), m_updateCurrentTimeCount(0)
     {
     }
 
-    int m_updateCurrentTimeCount;
+    int m_updateCurrentTimeCount = 0;
 protected:
     void updateCurrentTime(int currentTime)
     {
diff --git a/tests/auto/qml/animation/qsequentialanimationgroupjob/tst_qsequentialanimationgroupjob.cpp b/tests/auto/qml/animation/qsequentialanimationgroupjob/tst_qsequentialanimationgroupjob.cpp
index ee5db3e75a..57b0905a8a 100644
--- a/tests/auto/qml/animation/qsequentialanimationgroupjob/tst_qsequentialanimationgroupjob.cpp
+++ b/tests/auto/qml/animation/qsequentialanimationgroupjob/tst_qsequentialanimationgroupjob.cpp
@@ -95,7 +95,7 @@ class TestValueAnimation : public TestAnimation
 {
 public:
     TestValueAnimation(int duration = 250)
-        : TestAnimation(duration), start(0), end(0), value(0) {}
+        : TestAnimation(duration) {}
 
     void updateCurrentTime(int msecs)
     {
@@ -105,8 +105,8 @@ public:
             value = start + (end - start) * (qreal(msecs) / duration());
     }
 
-    qreal start, end;
-    qreal value;
+    qreal start = 0, end = 0;
+    qreal value = 0;
 };
 
 class UncontrolledAnimation : public QObject, public QAbstractAnimationJob
@@ -140,14 +140,14 @@ public:
 class FinishedListener: public QAnimationJobChangeListener
 {
 public:
-    FinishedListener() : m_count(0) {}
+    FinishedListener() {}
 
     virtual void animationFinished(QAbstractAnimationJob *) { ++m_count; }
     void clear() { m_count = 0; }
     int count() { return m_count; }
 
 private:
-    int m_count;
+    int m_count = 0;
 };
 
 void tst_QSequentialAnimationGroupJob::setCurrentTime()
diff --git a/tests/auto/qml/qjsengine/tst_qjsengine.cpp b/tests/auto/qml/qjsengine/tst_qjsengine.cpp
index b34aaea61c..8f3011001b 100644
--- a/tests/auto/qml/qjsengine/tst_qjsengine.cpp
+++ b/tests/auto/qml/qjsengine/tst_qjsengine.cpp
@@ -735,23 +735,18 @@ public:
     };
     Q_ENUMS(Enum1 Enum2)
 
-    Q_INVOKABLE TestQMetaObject()
-        : m_called(1) {
-    }
+    Q_INVOKABLE TestQMetaObject() {}
     Q_INVOKABLE TestQMetaObject(int)
-        : m_called(2) {
-    }
+        : m_called(2) {}
     Q_INVOKABLE TestQMetaObject(QString)
-        : m_called(3) {
-    }
+        : m_called(3) {}
     Q_INVOKABLE TestQMetaObject(QString, int)
-        : m_called(4) {
-    }
+        : m_called(4) {}
     int called() const {
         return m_called;
     }
 private:
-    int m_called;
+    int m_called = 1;
 };
 
 void tst_QJSEngine::newQObjectPropertyCache()
@@ -1300,8 +1295,8 @@ void tst_QJSEngine::errorMessage_QT679()
 
 struct Foo {
 public:
-    int x, y;
-    Foo() : x(-1), y(-1) { }
+    int x = -1, y = -1;
+    Foo() {}
 };
 
 Q_DECLARE_METATYPE(Foo)
@@ -3156,10 +3151,9 @@ class ThreadedTestEngine : public QThread {
     Q_OBJECT;
 
 public:
-    int result;
+    int result = 0;
 
-    ThreadedTestEngine()
-        : result(0) {}
+    ThreadedTestEngine() {}
 
     void run() {
         QJSEngine firstEngine;
@@ -4058,9 +4052,9 @@ class TestObject : public QObject
 {
     Q_OBJECT
 public:
-    TestObject() : called(false) {}
+    TestObject() {}
 
-    bool called;
+    bool called = false;
 
     Q_INVOKABLE void callMe(QQmlV4Function *) {
         called = true;
diff --git a/tests/auto/qml/qqmllistcompositor/tst_qqmllistcompositor.cpp b/tests/auto/qml/qqmllistcompositor/tst_qqmllistcompositor.cpp
index e6e47bda28..b49832499e 100644
--- a/tests/auto/qml/qqmllistcompositor/tst_qqmllistcompositor.cpp
+++ b/tests/auto/qml/qqmllistcompositor/tst_qqmllistcompositor.cpp
@@ -45,13 +45,13 @@ struct Range
 
 template <typename T>  struct Array
 {
-    Array() : array(nullptr), count(0) {}
+    Array() : array(nullptr) {}
     template<int N> Array(const T (&array)[N]) : array(array), count(N) {}
 
     T operator [](int index) const { return array[index]; }
 
     const T *array;
-    int count;
+    int count = 0;
 };
 
 typedef Array<int> IndexArray;
diff --git a/tests/auto/qml/qqmllocale/tst_qqmllocale.cpp b/tests/auto/qml/qqmllocale/tst_qqmllocale.cpp
index c2c2413c98..eb6eb62648 100644
--- a/tests/auto/qml/qqmllocale/tst_qqmllocale.cpp
+++ b/tests/auto/qml/qqmllocale/tst_qqmllocale.cpp
@@ -1232,7 +1232,7 @@ class DateFormatter : public QObject
 {
     Q_OBJECT
 public:
-    DateFormatter() : QObject() {}
+    DateFormatter() {}
 
     Q_INVOKABLE QString getLocalizedForm(const QString &isoTimestamp);
 };
diff --git a/tests/auto/qml/qqmlnotifier/tst_qqmlnotifier.cpp b/tests/auto/qml/qqmlnotifier/tst_qqmlnotifier.cpp
index 381ae98195..8811f779bb 100644
--- a/tests/auto/qml/qqmlnotifier/tst_qqmlnotifier.cpp
+++ b/tests/auto/qml/qqmlnotifier/tst_qqmlnotifier.cpp
@@ -46,21 +46,17 @@ class ExportedClass : public QObject
     Q_PROPERTY(int v4BindingProp2 READ v4BindingProp2 NOTIFY v4BindingProp2Changed)
     Q_PROPERTY(int scriptBindingProp READ scriptBindingProp NOTIFY scriptBindingPropChanged)
 public:
-    int qmlObjectPropConnections;
-    int cppObjectPropConnections;
-    int unboundPropConnections;
-    int v8BindingPropConnections;
-    int v4BindingPropConnections;
-    int v4BindingProp2Connections;
-    int scriptBindingPropConnections;
-    int boundSignalConnections;
-    int unusedSignalConnections;
-
-    ExportedClass()
-        : qmlObjectPropConnections(0), cppObjectPropConnections(0), unboundPropConnections(0),
-          v8BindingPropConnections(0), v4BindingPropConnections(0), v4BindingProp2Connections(0),
-          scriptBindingPropConnections(0), boundSignalConnections(0), unusedSignalConnections(0)
-    {}
+    int qmlObjectPropConnections = 0;
+    int cppObjectPropConnections = 0;
+    int unboundPropConnections = 0;
+    int v8BindingPropConnections = 0;
+    int v4BindingPropConnections = 0;
+    int v4BindingProp2Connections = 0;
+    int scriptBindingPropConnections = 0;
+    int boundSignalConnections = 0;
+    int unusedSignalConnections = 0;
+
+    ExportedClass() {}
 
     ~ExportedClass()
     {
@@ -141,9 +137,7 @@ class tst_qqmlnotifier : public QQmlDataTest
 {
     Q_OBJECT
 public:
-    tst_qqmlnotifier()
-        : root(nullptr), exportedClass(nullptr), exportedObject(nullptr)
-    {}
+    tst_qqmlnotifier() {}
 
 private slots:
     void initTestCase() override;
@@ -166,9 +160,9 @@ private:
     void createObjects();
 
     QQmlEngine engine;
-    QObject *root;
-    ExportedClass *exportedClass;
-    ExportedClass *exportedObject;
+    QObject *root = nullptr;
+    ExportedClass *exportedClass = nullptr;
+    ExportedClass *exportedObject = nullptr;
 };
 
 void tst_qqmlnotifier::initTestCase()
diff --git a/tests/auto/qml/qqmlpropertymap/tst_qqmlpropertymap.cpp b/tests/auto/qml/qqmlpropertymap/tst_qqmlpropertymap.cpp
index 62a8cd117d..86229b95f3 100644
--- a/tests/auto/qml/qqmlpropertymap/tst_qqmlpropertymap.cpp
+++ b/tests/auto/qml/qqmlpropertymap/tst_qqmlpropertymap.cpp
@@ -72,7 +72,6 @@ class LazyPropertyMap : public QQmlPropertyMap, public QQmlParserStatus
 public:
     LazyPropertyMap()
         : QQmlPropertyMap(this, /*parent*/nullptr)
-        , value(0)
     {}
 
     virtual void classBegin() {}
@@ -87,7 +86,7 @@ signals:
     void someFixedPropertyChanged();
 
 private:
-    int value;
+    int value = 0;
 };
 
 void tst_QQmlPropertyMap::initTestCase()
@@ -313,7 +312,7 @@ class MyEnhancedPropertyMap : public QQmlPropertyMap
 {
     Q_OBJECT
 public:
-    MyEnhancedPropertyMap() : QQmlPropertyMap(this, nullptr), m_testSlotCalled(false) {}
+    MyEnhancedPropertyMap() : QQmlPropertyMap(this, nullptr) {}
     bool testSlotCalled() const { return m_testSlotCalled; }
 
 signals:
@@ -323,7 +322,7 @@ public slots:
     void testSlot() { m_testSlotCalled = true; }
 
 private:
-    bool m_testSlotCalled;
+    bool m_testSlotCalled = false;
 };
 
 void tst_QQmlPropertyMap::metaObjectAccessibility()
diff --git a/tests/auto/qml/qqmlsettings/tst_qqmlsettings.cpp b/tests/auto/qml/qqmlsettings/tst_qqmlsettings.cpp
index 12c3032eda..b353d23539 100644
--- a/tests/auto/qml/qqmlsettings/tst_qqmlsettings.cpp
+++ b/tests/auto/qml/qqmlsettings/tst_qqmlsettings.cpp
@@ -88,10 +88,7 @@ class CppObject : public QObject
 
 public:
     CppObject(QObject *parent = nullptr) : QObject(parent),
-        m_intProperty(123),
-        m_boolProperty(true),
-        m_realProperty(1.23),
-        m_doubleProperty(3.45),
+
         m_stringProperty("foo"),
         m_urlProperty("http://www.qt-project.org"),
         m_objectProperty(keyValueMap("foo", "bar")),
@@ -127,10 +124,10 @@ signals:
     void fontPropertyChanged(const QFont &arg);
 
 private:
-    int m_intProperty;
-    bool m_boolProperty;
-    qreal m_realProperty;
-    double m_doubleProperty;
+    int m_intProperty = 123;
+    bool m_boolProperty = true;
+    qreal m_realProperty = 1.23;
+    double m_doubleProperty = 3.45;
     QString m_stringProperty;
     QUrl m_urlProperty;
     QVariant m_varProperty;
diff --git a/tests/auto/qml/qqmlstatemachine/tst_qqmlstatemachine.cpp b/tests/auto/qml/qqmlstatemachine/tst_qqmlstatemachine.cpp
index 52e27af647..68ed22c01c 100644
--- a/tests/auto/qml/qqmlstatemachine/tst_qqmlstatemachine.cpp
+++ b/tests/auto/qml/qqmlstatemachine/tst_qqmlstatemachine.cpp
@@ -55,10 +55,7 @@ public:
     };
 
 public:
-    CppObject()
-        : QObject()
-        , m_objectState(State0)
-    {}
+    CppObject() {}
 
     ObjectState objectState() const { return m_objectState; }
     void setObjectState(ObjectState objectState) { m_objectState = objectState; emit objectStateChanged();}
@@ -68,7 +65,7 @@ signals:
     void mySignal(int signalState);
 
 private:
-    ObjectState m_objectState;
+    ObjectState m_objectState = State0;
 };
 
 tst_qqmlstatemachine::tst_qqmlstatemachine()
diff --git a/tests/auto/qml/qqmltimer/tst_qqmltimer.cpp b/tests/auto/qml/qqmltimer/tst_qqmltimer.cpp
index 64f804c200..4e42d02514 100644
--- a/tests/auto/qml/qqmltimer/tst_qqmltimer.cpp
+++ b/tests/auto/qml/qqmltimer/tst_qqmltimer.cpp
@@ -89,11 +89,9 @@ class TimerHelper : public QObject
 {
     Q_OBJECT
 public:
-    TimerHelper() : QObject(), count(0)
-    {
-    }
+    TimerHelper() { }
 
-    int count;
+    int count = 0;
 
 public slots:
     void timeout() {
@@ -101,9 +99,7 @@ public slots:
     }
 };
 
-tst_qqmltimer::tst_qqmltimer()
-{
-}
+tst_qqmltimer::tst_qqmltimer() { }
 
 void tst_qqmltimer::initTestCase()
 {
diff --git a/tests/auto/qml/qquickfolderlistmodel/tst_qquickfolderlistmodel.cpp b/tests/auto/qml/qquickfolderlistmodel/tst_qquickfolderlistmodel.cpp
index 1f1be122f1..77fda3b555 100644
--- a/tests/auto/qml/qquickfolderlistmodel/tst_qquickfolderlistmodel.cpp
+++ b/tests/auto/qml/qquickfolderlistmodel/tst_qquickfolderlistmodel.cpp
@@ -48,7 +48,7 @@ class tst_qquickfolderlistmodel : public QQmlDataTest
 {
     Q_OBJECT
 public:
-    tst_qquickfolderlistmodel() : removeStart(0), removeEnd(0) {}
+    tst_qquickfolderlistmodel() {}
 
 public slots:
     void removed(const QModelIndex &, int start, int end) {
@@ -78,8 +78,8 @@ private:
     void checkNoErrors(const QQmlComponent& component);
     QQmlEngine engine;
 
-    int removeStart;
-    int removeEnd;
+    int removeStart = 0;
+    int removeEnd = 0;
 };
 
 void tst_qquickfolderlistmodel::checkNoErrors(const QQmlComponent& component)
diff --git a/tests/auto/quick/nodes/tst_nodestest.cpp b/tests/auto/quick/nodes/tst_nodestest.cpp
index c9af5a5c34..79a9e5f757 100644
--- a/tests/auto/quick/nodes/tst_nodestest.cpp
+++ b/tests/auto/quick/nodes/tst_nodestest.cpp
@@ -76,9 +76,9 @@ private Q_SLOTS:
     void textureNodeRect();
 
 private:
-    QOffscreenSurface *surface;
-    QOpenGLContext *context;
-    QSGDefaultRenderContext *renderContext;
+    QOffscreenSurface *surface = nullptr;
+    QOpenGLContext *context = nullptr;
+    QSGDefaultRenderContext *renderContext = nullptr;
 };
 
 void NodesTest::initTestCase()
@@ -147,9 +147,6 @@ public:
 int DummyRenderer::globalRendereringOrder;
 
 NodesTest::NodesTest()
-    : surface(nullptr)
-    , context(nullptr)
-    , renderContext(nullptr)
 {
 }
 
diff --git a/tests/auto/quick/qquickdrag/tst_qquickdrag.cpp b/tests/auto/quick/qquickdrag/tst_qquickdrag.cpp
index 42af7d4443..9d832066af 100644
--- a/tests/auto/quick/qquickdrag/tst_qquickdrag.cpp
+++ b/tests/auto/quick/qquickdrag/tst_qquickdrag.cpp
@@ -59,14 +59,6 @@ class TestDropTarget : public QQuickItem
 public:
     TestDropTarget(QQuickItem *parent = nullptr)
         : QQuickItem(parent)
-        , enterEvents(0)
-        , moveEvents(0)
-        , leaveEvents(0)
-        , dropEvents(0)
-        , acceptAction(Qt::MoveAction)
-        , defaultAction(Qt::IgnoreAction)
-        , proposedAction(Qt::IgnoreAction)
-        , accept(true)
     {
         setFlags(ItemAcceptsDrops);
     }
@@ -119,16 +111,16 @@ public:
         event->setAccepted(accept);
     }
 
-    int enterEvents;
-    int moveEvents;
-    int leaveEvents;
-    int dropEvents;
-    Qt::DropAction acceptAction;
-    Qt::DropAction defaultAction;
-    Qt::DropAction proposedAction;
+    int enterEvents = 0;
+    int moveEvents = 0;
+    int leaveEvents = 0;
+    int dropEvents = 0;
+    Qt::DropAction acceptAction = Qt::MoveAction;
+    Qt::DropAction defaultAction = Qt::IgnoreAction;
+    Qt::DropAction proposedAction = Qt::IgnoreAction;
     Qt::DropActions supportedActions;
     QPointF position;
-    bool accept;
+    bool accept = true;
 };
 
 class tst_QQuickDrag: public QObject
diff --git a/tests/auto/quick/qquickimageprovider/tst_qquickimageprovider.cpp b/tests/auto/quick/qquickimageprovider/tst_qquickimageprovider.cpp
index 4298bc198b..d8464ebc74 100644
--- a/tests/auto/quick/qquickimageprovider/tst_qquickimageprovider.cpp
+++ b/tests/auto/quick/qquickimageprovider/tst_qquickimageprovider.cpp
@@ -393,7 +393,7 @@ void tst_qquickimageprovider::imageProviderId()
 class TestThreadProvider : public QQuickImageProvider
 {
     public:
-        TestThreadProvider() : QQuickImageProvider(Image), ok(false) {}
+        TestThreadProvider() : QQuickImageProvider(Image) {}
 
         ~TestThreadProvider() {}
 
@@ -417,7 +417,7 @@ class TestThreadProvider : public QQuickImageProvider
 
         QWaitCondition cond;
         QMutex mutex;
-        bool ok;
+        bool ok = false;
 };
 
 
@@ -495,7 +495,7 @@ class TestImageResponse : public QQuickImageResponse, public QRunnable
 class TestAsyncProvider : public QQuickAsyncImageProvider
 {
     public:
-        TestAsyncProvider() : ok(false)
+        TestAsyncProvider()
         {
             pool.setMaxThreadCount(4);
         }
@@ -512,7 +512,7 @@ class TestAsyncProvider : public QQuickAsyncImageProvider
         QThreadPool pool;
         QMutex lock;
         QWaitCondition condition;
-        bool ok;
+        bool ok = false;
 };
 
 
diff --git a/tests/auto/quick/qquickitemlayer/tst_qquickitemlayer.cpp b/tests/auto/quick/qquickitemlayer/tst_qquickitemlayer.cpp
index 599e8d92b4..1a289a2087 100644
--- a/tests/auto/quick/qquickitemlayer/tst_qquickitemlayer.cpp
+++ b/tests/auto/quick/qquickitemlayer/tst_qquickitemlayer.cpp
@@ -89,17 +89,12 @@ private slots:
 private:
     void mirroringCheck(int mirroring, int x, bool shouldMirror, const QImage &fb);
 
-    bool m_isMesaSoftwareRasterizer;
-    int m_mesaVersion;
-    bool m_isOpenGLRenderer;
+    bool m_isMesaSoftwareRasterizer = false;
+    int m_mesaVersion = 0;
+    bool m_isOpenGLRenderer = true;
 };
 
-tst_QQuickItemLayer::tst_QQuickItemLayer()
-    : m_isMesaSoftwareRasterizer(false)
-    , m_mesaVersion(0)
-    , m_isOpenGLRenderer(true)
-{
-}
+tst_QQuickItemLayer::tst_QQuickItemLayer() { }
 
 void tst_QQuickItemLayer::initTestCase()
 {
diff --git a/tests/auto/quick/qquickloader/tst_qquickloader.cpp b/tests/auto/quick/qquickloader/tst_qquickloader.cpp
index 5c11628e97..30fc52f95a 100644
--- a/tests/auto/quick/qquickloader/tst_qquickloader.cpp
+++ b/tests/auto/quick/qquickloader/tst_qquickloader.cpp
@@ -54,11 +54,11 @@ class PeriodicIncubationController : public QObject,
     public QQmlIncubationController
 {
 public:
-    PeriodicIncubationController() : incubated(false) {}
+    PeriodicIncubationController() {}
 
     void start() { startTimer(20); }
 
-    bool incubated;
+    bool incubated = false;
 
 protected:
     virtual void timerEvent(QTimerEvent *) {
diff --git a/tests/auto/quick/qquickmultipointtoucharea/tst_qquickmultipointtoucharea.cpp b/tests/auto/quick/qquickmultipointtoucharea/tst_qquickmultipointtoucharea.cpp
index 056b1fc020..73f3cab318 100644
--- a/tests/auto/quick/qquickmultipointtoucharea/tst_qquickmultipointtoucharea.cpp
+++ b/tests/auto/quick/qquickmultipointtoucharea/tst_qquickmultipointtoucharea.cpp
@@ -41,7 +41,7 @@ class tst_QQuickMultiPointTouchArea : public QQmlDataTest
 {
     Q_OBJECT
 public:
-    tst_QQuickMultiPointTouchArea() : device(nullptr) { }
+    tst_QQuickMultiPointTouchArea() { }
 
 private slots:
     void initTestCase() {
@@ -73,7 +73,7 @@ private slots:
 
 private:
     QQuickView *createAndShowView(const QString &file);
-    QTouchDevice *device;
+    QTouchDevice *device = nullptr;
 };
 
 void tst_QQuickMultiPointTouchArea::properties()
diff --git a/tests/auto/quick/qquickpincharea/tst_qquickpincharea.cpp b/tests/auto/quick/qquickpincharea/tst_qquickpincharea.cpp
index fd81c0a67c..2571e4f288 100644
--- a/tests/auto/quick/qquickpincharea/tst_qquickpincharea.cpp
+++ b/tests/auto/quick/qquickpincharea/tst_qquickpincharea.cpp
@@ -41,7 +41,7 @@ class tst_QQuickPinchArea: public QQmlDataTest
 {
     Q_OBJECT
 public:
-    tst_QQuickPinchArea() : device(nullptr) { }
+    tst_QQuickPinchArea() { }
 private slots:
     void initTestCase();
     void cleanupTestCase();
@@ -55,7 +55,7 @@ private slots:
 
 private:
     QQuickView *createView();
-    QTouchDevice *device;
+    QTouchDevice *device = nullptr;
 };
 void tst_QQuickPinchArea::initTestCase()
 {
diff --git a/tests/auto/quick/rendernode/tst_rendernode.cpp b/tests/auto/quick/rendernode/tst_rendernode.cpp
index d6e1982b1e..0e06ee6f50 100644
--- a/tests/auto/quick/rendernode/tst_rendernode.cpp
+++ b/tests/auto/quick/rendernode/tst_rendernode.cpp
@@ -120,7 +120,7 @@ private:
 class MessUpNode : public QSGRenderNode, protected QOpenGLFunctions
 {
 public:
-    MessUpNode() : initialized(false) { }
+    MessUpNode() {}
 
     StateFlags changedStates() const override
     {
@@ -157,7 +157,7 @@ public:
         glBindFramebuffer(GL_FRAMEBUFFER, fbo);
     }
 
-    bool initialized;
+    bool initialized = false;
 };
 
 class MessUpItem : public QQuickItem
diff --git a/tests/auto/quick/touchmouse/tst_touchmouse.cpp b/tests/auto/quick/touchmouse/tst_touchmouse.cpp
index 67a7c56099..a79ff4e78f 100644
--- a/tests/auto/quick/touchmouse/tst_touchmouse.cpp
+++ b/tests/auto/quick/touchmouse/tst_touchmouse.cpp
@@ -87,7 +87,7 @@ Q_SIGNALS:
 
 public:
     EventItem(QQuickItem *parent = nullptr)
-        : QQuickItem(parent), touchUngrabCount(0), acceptMouse(false), acceptTouch(false), filterTouch(false), point0(-1)
+        : QQuickItem(parent)
     {
         setAcceptedMouseButtons(Qt::LeftButton);
 #if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
@@ -140,10 +140,10 @@ public:
     }
 
     QList<Event> eventList;
-    int touchUngrabCount;
-    bool acceptMouse;
-    bool acceptTouch;
-    bool filterTouch; // when used as event filter
+    int touchUngrabCount = 0;
+    bool acceptMouse = false;
+    bool acceptTouch = false;
+    bool filterTouch = false; // when used as event filter
 
     bool eventFilter(QObject *, QEvent *event)
     {
@@ -162,7 +162,7 @@ public:
         }
         return false;
     }
-    int point0;
+    int point0 = -1;
 };
 
 class tst_TouchMouse : public QQmlDataTest