tests/auto/widgets: Remove some placeholder formatting.

Use QByteArray/QString addition instead in loops and for
test row names.

Change-Id: Ia067cd966bf13506e6ca19925eae3158da027b83
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@theqtcompany.com>

45 files changed, 385 insertions, 317 deletions

diff --git a/tests/auto/widgets/dialogs/qfiledialog/tst_qfiledialog.cpp b/tests/auto/widgets/dialogs/qfiledialog/tst_qfiledialog.cpp
index 16ff118a3f..ed4cc64410 100644
--- a/tests/auto/widgets/dialogs/qfiledialog/tst_qfiledialog.cpp
+++ b/tests/auto/widgets/dialogs/qfiledialog/tst_qfiledialog.cpp
@@ -942,7 +942,7 @@ void tst_QFiledialog::selectFiles()
 
     QString filesPath = fd.directory().absolutePath();
     for (int i=0; i < 5; ++i) {
-        QFile file(filesPath + QString::fromLatin1("/qfiledialog_auto_test_not_pres_%1").arg(i));
+        QFile file(filesPath + QLatin1String("/qfiledialog_auto_test_not_pres_") + QString::number(i));
         file.open(QIODevice::WriteOnly);
         file.resize(1024);
         file.flush();
diff --git a/tests/auto/widgets/dialogs/qfiledialog2/tst_qfiledialog2.cpp b/tests/auto/widgets/dialogs/qfiledialog2/tst_qfiledialog2.cpp
index cca150eb54..5e5affed28 100644
--- a/tests/auto/widgets/dialogs/qfiledialog2/tst_qfiledialog2.cpp
+++ b/tests/auto/widgets/dialogs/qfiledialog2/tst_qfiledialog2.cpp
@@ -1149,7 +1149,7 @@ void tst_QFileDialog2::task257579_sideBarWithNonCleanUrls()
     QLatin1String dirname("autotest_task257579");
     dir.rmdir(dirname); //makes sure it doesn't exist any more
     QVERIFY(dir.mkdir(dirname));
-    QString url = QString::fromLatin1("%1/%2/..").arg(dir.absolutePath()).arg(dirname);
+    QString url = dir.absolutePath() + QLatin1Char('/') + dirname + QLatin1String("/..");
     QNonNativeFileDialog fd;
     fd.setSidebarUrls(QList<QUrl>() << QUrl::fromLocalFile(url));
     QSidebar *sidebar = fd.findChild<QSidebar*>("sidebar");
diff --git a/tests/auto/widgets/dialogs/qfilesystemmodel/tst_qfilesystemmodel.cpp b/tests/auto/widgets/dialogs/qfilesystemmodel/tst_qfilesystemmodel.cpp
index a70be695ef..acf45f8fb7 100644
--- a/tests/auto/widgets/dialogs/qfilesystemmodel/tst_qfilesystemmodel.cpp
+++ b/tests/auto/widgets/dialogs/qfilesystemmodel/tst_qfilesystemmodel.cpp
@@ -251,15 +251,17 @@ void tst_QFileSystemModel::naturalCompare_data()
     QTest::addColumn<int>("result");
     QTest::addColumn<int>("swap");
 
-#define ROWNAME(name) (qPrintable(QString("prefix=%1, postfix=%2, num=%3, i=%4, test=%5").arg(prefix).arg(postfix).arg(num).arg(i).arg(name)))
+#define ROWNAME(name) (("prefix=" + prefix.toLatin1() + ", postfix=" + postfix.toLatin1() \
+                        + ", num=" + num.toLatin1() + ", i=" + QByteArray::number(i) \
+                        + ", test=" + name).constData())
 
     for (int j = 0; j < 4; ++j) { // <- set a prefix and a postfix string (not numbers)
         QString prefix = (j == 0 || j == 1) ? "b" : "";
         QString postfix = (j == 1 || j == 2) ? "y" : "";
 
         for (int k = 0; k < 3; ++k) { // <- make 0 not a special case
-            QString num = QString("%1").arg(k);
-            QString nump = QString("%1").arg(k + 1);
+            const QString num = QString::number(k);
+            const QString nump = QString::number(k + 1);
             for (int i = 10; i < 12; ++i) { // <- swap s1 and s2 and reverse the result
                 QTest::newRow(ROWNAME("basic"))          << prefix + "0" + postfix << prefix + "0" + postfix << int(Qt::CaseInsensitive) << 0;
 
@@ -470,8 +472,9 @@ void tst_QFileSystemModel::rowsInserted_data()
     QTest::addColumn<int>("count");
     QTest::addColumn<int>("ascending");
     for (int i = 0; i < 4; ++i) {
-        QTest::newRow(QString("Qt::AscendingOrder %1").arg(i).toLocal8Bit().constData())  << i << (int)Qt::AscendingOrder;
-        QTest::newRow(QString("Qt::DescendingOrder %1").arg(i).toLocal8Bit().constData()) << i << (int)Qt::DescendingOrder;
+        const QByteArray iB = QByteArray::number(i);
+        QTest::newRow(("Qt::AscendingOrder " + iB).constData()) << i << (int)Qt::AscendingOrder;
+        QTest::newRow(("Qt::DescendingOrder " + iB).constData()) << i << (int)Qt::DescendingOrder;
     }
 }
 
@@ -499,7 +502,7 @@ void tst_QFileSystemModel::rowsInserted()
     int oldCount = model->rowCount(root);
     QStringList files;
     for (int i = 0; i < count; ++i)
-        files.append(QString("c%1").arg(i));
+        files.append(QLatin1Char('c') + QString::number(i));
     QVERIFY(createFiles(tmp, files, 5));
     TRY_WAIT(model->rowCount(root) == oldCount + count);
     QTRY_COMPARE(model->rowCount(root), oldCount + count);
@@ -1019,8 +1022,8 @@ void tst_QFileSystemModel::dirsBeforeFiles()
 
     for (int i = 0; i < 3; ++i) {
         QLatin1Char c('a' + i);
-        dir.mkdir(QString("%1-dir").arg(c));
-        QFile file(flatDirTestPath + QString("/%1-file").arg(c));
+        dir.mkdir(c + QLatin1String("-dir"));
+        QFile file(flatDirTestPath + QLatin1Char('/') + c + QLatin1String("-file"));
         file.open(QIODevice::ReadWrite);
         file.close();
     }
diff --git a/tests/auto/widgets/dialogs/qinputdialog/tst_qinputdialog.cpp b/tests/auto/widgets/dialogs/qinputdialog/tst_qinputdialog.cpp
index c3b80304a2..2590f31608 100644
--- a/tests/auto/widgets/dialogs/qinputdialog/tst_qinputdialog.cpp
+++ b/tests/auto/widgets/dialogs/qinputdialog/tst_qinputdialog.cpp
@@ -168,10 +168,10 @@ void testGetNumeric(QInputDialog *dialog, SpinBoxType * = 0, ValueType * = 0)
     const ValueType origValue = sbox->value();
 
     testInvalidateAndRestore<SpinBoxType, ValueType>(sbox, okButton, ledit);
-    testTypingValue<SpinBoxType>(sbox, okButton, QString("%1").arg(sbox->minimum()));
-    testTypingValue<SpinBoxType>(sbox, okButton, QString("%1").arg(sbox->maximum()));
-    testTypingValue<SpinBoxType>(sbox, okButton, QString("%1").arg(sbox->minimum() - 1));
-    testTypingValue<SpinBoxType>(sbox, okButton, QString("%1").arg(sbox->maximum() + 1));
+    testTypingValue<SpinBoxType>(sbox, okButton, QString::number(sbox->minimum()));
+    testTypingValue<SpinBoxType>(sbox, okButton, QString::number(sbox->maximum()));
+    testTypingValue<SpinBoxType>(sbox, okButton, QString::number(sbox->minimum() - 1));
+    testTypingValue<SpinBoxType>(sbox, okButton, QString::number(sbox->maximum() + 1));
     testTypingValue<SpinBoxType>(sbox, okButton, "0");
     testTypingValue<SpinBoxType>(sbox, okButton, "0.0");
     testTypingValue<SpinBoxType>(sbox, okButton, "foobar");
diff --git a/tests/auto/widgets/dialogs/qwizard/tst_qwizard.cpp b/tests/auto/widgets/dialogs/qwizard/tst_qwizard.cpp
index 5fddaf21ea..e25f41da3f 100644
--- a/tests/auto/widgets/dialogs/qwizard/tst_qwizard.cpp
+++ b/tests/auto/widgets/dialogs/qwizard/tst_qwizard.cpp
@@ -1625,7 +1625,7 @@ class SetPage : public Operation
         for (int j = 0; j < page; ++j)
             wizard->next();
     }
-    QString describe() const { return QString("set page %1").arg(page); }
+    QString describe() const { return QLatin1String("set page ") + QString::number(page); }
     const int page;
 public:
     SetPage(int page) : page(page) {}
@@ -1634,7 +1634,7 @@ public:
 class SetStyle : public Operation
 {
     void apply(QWizard *wizard) const { wizard->setWizardStyle(style); }
-    QString describe() const { return QString("set style %1").arg(style); }
+    QString describe() const { return QLatin1String("set style ") + QString::number(style); }
     const QWizard::WizardStyle style;
 public:
     SetStyle(QWizard::WizardStyle style) : style(style) {}
@@ -1697,7 +1697,8 @@ public:
 
 QString SetOption::describe() const
 {
-    return QString("set opt %1 %2").arg(OptionInfo::instance().tag(option)).arg(on);
+    return QLatin1String("set opt ") + OptionInfo::instance().tag(option)
+        + QLatin1Char(on ? '1' : '0');
 }
 
 Q_DECLARE_METATYPE(Operation *)
@@ -1726,7 +1727,7 @@ public:
     void createTestRows()
     {
         for (int i = 0; i < combinations.count(); ++i) {
-            QTest::newRow((name + QString(", row %1").arg(i)).toLatin1().data())
+            QTest::newRow((name.toLatin1() + ", row " + QByteArray::number(i)).constData())
                 << (i == 0) << (type == Equality) << *(combinations.at(i));
             ++nRows_;
         }
@@ -1827,7 +1828,7 @@ public:
         foreach (Operation * op, operations) {
             if (op) {
                 op->apply(this);
-                opsDescr += QString("(%1) ").arg(op->describe());
+                opsDescr += QLatin1Char('(') + op->describe() + QLatin1String(") ");
             }
         }
     }
diff --git a/tests/auto/widgets/graphicsview/qgraphicsanchorlayout1/tst_qgraphicsanchorlayout1.cpp b/tests/auto/widgets/graphicsview/qgraphicsanchorlayout1/tst_qgraphicsanchorlayout1.cpp
index a58f295575..15987a094e 100644
--- a/tests/auto/widgets/graphicsview/qgraphicsanchorlayout1/tst_qgraphicsanchorlayout1.cpp
+++ b/tests/auto/widgets/graphicsview/qgraphicsanchorlayout1/tst_qgraphicsanchorlayout1.cpp
@@ -159,7 +159,7 @@ public:
         {
             setContentsMargins( 0,0,0,0 );
             if (name.isEmpty())
-                setData(0, QString::fromLatin1("w%1").arg(quintptr(this)));
+                setData(0, QLatin1Char('w') + QString::number(quintptr(this)));
             else
                 setData(0, name);
         }
@@ -1702,10 +1702,8 @@ void tst_QGraphicsAnchorLayout1::testBasicLayout()
 
     // Create dummy widgets
     QList<QGraphicsWidget *> widgets;
-    for (int i = 0; i < widgetCount; ++i) {
-        TestWidget *w = new TestWidget(0, QString::fromLatin1("W%1").arg(i));
-        widgets << w;
-    }
+    for (int i = 0; i < widgetCount; ++i)
+        widgets << new TestWidget(0, QLatin1Char('W') + QString::number(i));
 
     // Setup anchor layout
     TheAnchorLayout *layout = new TheAnchorLayout;
diff --git a/tests/auto/widgets/graphicsview/qgraphicsgridlayout/tst_qgraphicsgridlayout.cpp b/tests/auto/widgets/graphicsview/qgraphicsgridlayout/tst_qgraphicsgridlayout.cpp
index 8c27bebf3a..2d1efab4d1 100644
--- a/tests/auto/widgets/graphicsview/qgraphicsgridlayout/tst_qgraphicsgridlayout.cpp
+++ b/tests/auto/widgets/graphicsview/qgraphicsgridlayout/tst_qgraphicsgridlayout.cpp
@@ -451,9 +451,10 @@ void tst_QGraphicsGridLayout::addItem_data()
         int column = b;
         int rowSpan = c;
         int columnSpan = d;
-        QString name = QString::fromLatin1("(%1,%2,%3,%4").arg(a).arg(b).arg(c).arg(d);
+        const QByteArray name = '(' + QByteArray::number(a) + ',' + QByteArray::number(b)
+            + ',' + QByteArray::number(c) + ',' + QByteArray::number(d);
         Qt::Alignment alignment = Qt::AlignLeft;
-        QTest::newRow(name.toLatin1()) << row << column << rowSpan << columnSpan << alignment;
+        QTest::newRow(name.constData()) << row << column << rowSpan << columnSpan << alignment;
     }}}}
 }
 
@@ -1107,7 +1108,8 @@ void tst_QGraphicsGridLayout::itemAt()
         if (i >= 0 && i < layout->count()) {
             QVERIFY(layout->itemAt(i));
         } else {
-            QTest::ignoreMessage(QtWarningMsg, QString::fromLatin1("QGraphicsGridLayout::itemAt: invalid index %1").arg(i).toLatin1().constData());
+            const QByteArray message = "QGraphicsGridLayout::itemAt: invalid index " + QByteArray::number(i);
+            QTest::ignoreMessage(QtWarningMsg, message.constData());
             QCOMPARE(layout->itemAt(i), static_cast<QGraphicsLayoutItem*>(0));
         }
     }
diff --git a/tests/auto/widgets/graphicsview/qgraphicsitem/tst_qgraphicsitem.cpp b/tests/auto/widgets/graphicsview/qgraphicsitem/tst_qgraphicsitem.cpp
index c097a6a969..28ce831889 100644
--- a/tests/auto/widgets/graphicsview/qgraphicsitem/tst_qgraphicsitem.cpp
+++ b/tests/auto/widgets/graphicsview/qgraphicsitem/tst_qgraphicsitem.cpp
@@ -4130,9 +4130,9 @@ public:
         font.setPointSize(4);
         painter->setFont(font);
         for (int x = -100; x < 100; x += 25) {
-            for (int y = -100; y < 100; y += 25) {
-                painter->drawText(QRectF(x, y, 25, 25), Qt::AlignCenter, QString("%1x%2").arg(x).arg(y));
-            }
+            const QString prefix = QString::number(x) + QLatin1Char('x');
+            for (int y = -100; y < 100; y += 25)
+                painter->drawText(QRectF(x, y, 25, 25), Qt::AlignCenter, prefix + QString::number(y));
         }
     }
 };
@@ -7658,7 +7658,9 @@ public:
     void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0)
     {
         QGraphicsRectItem::paint(painter, option, widget);
-        painter->drawText(boundingRect(), Qt::AlignCenter, QString("%1x%2\n%3x%4").arg(p.x()).arg(p.y()).arg(sp.x()).arg(sp.y()));
+        const QString text = QString::number(p.x()) + QLatin1Char('x') + QString::number(p.y())
+            + QLatin1Char('\n') + QString::number(sp.x()) + QLatin1Char('x') + QString::number(sp.y());
+        painter->drawText(boundingRect(), Qt::AlignCenter, text);
     }
 
 protected:
@@ -8246,10 +8248,11 @@ void tst_QGraphicsItem::sorting()
     QGraphicsScene scene;
     QGraphicsItem *grid[100][100];
     for (int x = 0; x < 100; ++x) {
+        const QString prefix = QString::number(x) + QLatin1Char('x');
         for (int y = 0; y < 100; ++y) {
             PainterItem *item = new PainterItem;
             item->setPos(x * 25, y * 25);
-            item->setData(0, QString("%1x%2").arg(x).arg(y));
+            item->setData(0, prefix + QString::number(y));
             grid[x][y] = item;
             scene.addItem(item);
         }
diff --git a/tests/auto/widgets/graphicsview/qgraphicslayoutitem/tst_qgraphicslayoutitem.cpp b/tests/auto/widgets/graphicsview/qgraphicslayoutitem/tst_qgraphicslayoutitem.cpp
index c291f09def..43993f6dbc 100644
--- a/tests/auto/widgets/graphicsview/qgraphicslayoutitem/tst_qgraphicslayoutitem.cpp
+++ b/tests/auto/widgets/graphicsview/qgraphicslayoutitem/tst_qgraphicslayoutitem.cpp
@@ -146,7 +146,7 @@ void tst_QGraphicsLayoutItem::effectiveSizeHint_data()
     QTest::addColumn<Qt::SizeHint>("sizeHint");
     QTest::addColumn<QSizeF>("constraint");
     for (int i = 0; i < 15; ++i) {
-        QTestData &data = QTest::newRow(QString("%1").arg(i).toLatin1());
+        QTestData &data = QTest::newRow(QByteArray::number(i).constData());
         switch(i % 5) {
         case 0: data << Qt::MinimumSize; break;
         case 1: data << Qt::PreferredSize; break;
diff --git a/tests/auto/widgets/graphicsview/qgraphicslinearlayout/tst_qgraphicslinearlayout.cpp b/tests/auto/widgets/graphicsview/qgraphicslinearlayout/tst_qgraphicslinearlayout.cpp
index 8bebd4eddd..d0aacf5dad 100644
--- a/tests/auto/widgets/graphicsview/qgraphicslinearlayout/tst_qgraphicslinearlayout.cpp
+++ b/tests/auto/widgets/graphicsview/qgraphicslinearlayout/tst_qgraphicslinearlayout.cpp
@@ -425,10 +425,11 @@ void tst_QGraphicsLinearLayout::dump_data()
     QTest::addColumn<int>("itemCount");
     QTest::addColumn<int>("layoutCount");
     for (int i = -1; i < 3; ++i) {
-        QTest::newRow(QString("%1, 0, 0").arg(i).toLatin1()) << 0 << 0;
-        QTest::newRow(QString("%1, 0, 5").arg(i).toLatin1()) << 5 << 5;
-        QTest::newRow(QString("%1, 5, 0").arg(i).toLatin1()) << 5 << 5;
-        QTest::newRow(QString("%1, 5, 5").arg(i).toLatin1()) << 5 << 5;
+        const QByteArray iB = QByteArray::number(i);
+        QTest::newRow((iB + ", 0, 0").constData()) << 0 << 0;
+        QTest::newRow((iB + ", 0, 5").constData()) << 5 << 5;
+        QTest::newRow((iB + ", 5, 0").constData()) << 5 << 5;
+        QTest::newRow((iB + ", 5, 5").constData()) << 5 << 5;
     }
 }
 
@@ -511,11 +512,13 @@ void tst_QGraphicsLinearLayout::insertItem_data()
     QTest::addColumn<int>("insertItemAt");
     QTest::addColumn<bool>("isWidget");
     for (int i = -1; i < 4; ++i) {
+        const QByteArray iB = QByteArray::number(i);
         for (int j = 0; j < 2; ++j) {
-            QTest::newRow(QString("0, 0, %1 %2").arg(i).arg(j).toLatin1()) << 0 << 0 << i << (bool)j;
-            QTest::newRow(QString("1, 0, %1 %2").arg(i).arg(j).toLatin1()) << 1 << 0 << i << (bool)j;
-            QTest::newRow(QString("0, 1, %1 %2").arg(i).arg(j).toLatin1()) << 0 << 1 << i << (bool)j;
-            QTest::newRow(QString("2, 2, %1 %2").arg(i).arg(j).toLatin1()) << 2 << 2 << i << (bool)j;
+            const QByteArray postFix = iB + ' ' + QByteArray::number(j);
+            QTest::newRow(("0, 0, " + postFix).constData()) << 0 << 0 << i << (bool)j;
+            QTest::newRow(("1, 0, " + postFix).constData()) << 1 << 0 << i << (bool)j;
+            QTest::newRow(("0, 1, " + postFix).constData()) << 0 << 1 << i << (bool)j;
+            QTest::newRow(("2, 2, " + postFix).constData()) << 2 << 2 << i << (bool)j;
         }
     }
 }
@@ -565,11 +568,13 @@ void tst_QGraphicsLinearLayout::insertStretch_data()
     QTest::addColumn<int>("insertItemAt");
     QTest::addColumn<int>("stretch");
     for (int i = -1; i < 4; ++i) {
+        const QByteArray iB = QByteArray::number(i);
         for (int j = 0; j < 2; ++j) {
-            QTest::newRow(QString("0, 0, %1 %2").arg(i).arg(j).toLatin1()) << 0 << 0 << i << j;
-            QTest::newRow(QString("1, 0, %1 %2").arg(i).arg(j).toLatin1()) << 1 << 0 << i << j;
-            QTest::newRow(QString("0, 1, %1 %2").arg(i).arg(j).toLatin1()) << 0 << 1 << i << j;
-            QTest::newRow(QString("2, 2, %1 %2").arg(i).arg(j).toLatin1()) << 2 << 2 << i << j;
+            const QByteArray postFix = iB + ' ' + QByteArray::number(j);
+            QTest::newRow(("0, 0, " + postFix).constData()) << 0 << 0 << i << j;
+            QTest::newRow(("1, 0, " + postFix).constData()) << 1 << 0 << i << j;
+            QTest::newRow(("0, 1, " + postFix).constData()) << 0 << 1 << i << j;
+            QTest::newRow(("2, 2, " + postFix).constData()) << 2 << 2 << i << j;
         }
     }
 }
@@ -786,12 +791,13 @@ void tst_QGraphicsLinearLayout::removeAt_data()
     QTest::addColumn<int>("removeItemAt");
     QTest::addColumn<Qt::Orientation>("orientation");
     for (int i = -1; i < 4; ++i) {
+        const QByteArray iB = QByteArray::number(i);
         for (int k = 0; k < 2; ++k) {
             Qt::Orientation orientation = (k == 0) ? Qt::Vertical : Qt::Horizontal;
-            QTest::newRow(QString("0, 0, %1").arg(i).toLatin1()) << 0 << 0 << i << orientation;
-            QTest::newRow(QString("1, 0, %1").arg(i).toLatin1()) << 1 << 0 << i << orientation;
-            QTest::newRow(QString("0, 1, %1").arg(i).toLatin1()) << 0 << 1 << i << orientation;
-            QTest::newRow(QString("2, 2, %1").arg(i).toLatin1()) << 2 << 2 << i << orientation;
+            QTest::newRow(("0, 0, " + iB).constData()) << 0 << 0 << i << orientation;
+            QTest::newRow(("1, 0, " + iB).constData()) << 1 << 0 << i << orientation;
+            QTest::newRow(("0, 1, " + iB).constData()) << 0 << 1 << i << orientation;
+            QTest::newRow(("2, 2, " + iB).constData()) << 2 << 2 << i << orientation;
         }
     }
 }
@@ -840,10 +846,11 @@ void tst_QGraphicsLinearLayout::removeItem_data()
     QTest::addColumn<int>("layoutCount");
     QTest::addColumn<int>("removeItemAt");
     for (int i = -1; i < 4; ++i) {
-        QTest::newRow(QString("0, 0, %1").arg(i).toLatin1()) << 0 << 0 << i;
-        QTest::newRow(QString("1, 0, %1").arg(i).toLatin1()) << 1 << 0 << i;
-        QTest::newRow(QString("0, 1, %1").arg(i).toLatin1()) << 0 << 1 << i;
-        QTest::newRow(QString("2, 2, %1").arg(i).toLatin1()) << 2 << 2 << i;
+        const QByteArray iB = QByteArray::number(i);
+        QTest::newRow(("0, 0, " + iB).constData()) << 0 << 0 << i;
+        QTest::newRow(("1, 0, " + iB).constData()) << 1 << 0 << i;
+        QTest::newRow(("0, 1, " + iB).constData()) << 0 << 1 << i;
+        QTest::newRow(("2, 2, " + iB).constData()) << 2 << 2 << i;
     }
 }
 
diff --git a/tests/auto/widgets/graphicsview/qgraphicsproxywidget/tst_qgraphicsproxywidget.cpp b/tests/auto/widgets/graphicsview/qgraphicsproxywidget/tst_qgraphicsproxywidget.cpp
index 7d5946dc5f..10708c0dd7 100644
--- a/tests/auto/widgets/graphicsview/qgraphicsproxywidget/tst_qgraphicsproxywidget.cpp
+++ b/tests/auto/widgets/graphicsview/qgraphicsproxywidget/tst_qgraphicsproxywidget.cpp
@@ -543,14 +543,15 @@ void tst_QGraphicsProxyWidget::testEventFilter_data()
     QTest::newRow("none") << QEvent::None << false;
     for (int i = 0; i < 2; ++i) {
         bool fromObject = (i == 0);
-        QTest::newRow(QString("resize %1").arg(fromObject).toLatin1()) << QEvent::Resize << fromObject;
-        QTest::newRow(QString("move %1").arg(fromObject).toLatin1()) << QEvent::Move << fromObject;
-        QTest::newRow(QString("hide %1").arg(fromObject).toLatin1()) << QEvent::Hide << fromObject;
-        QTest::newRow(QString("show %1").arg(fromObject).toLatin1()) << QEvent::Show << fromObject;
-        QTest::newRow(QString("enabled %1").arg(fromObject).toLatin1()) << QEvent::EnabledChange << fromObject;
-        QTest::newRow(QString("focusIn %1").arg(fromObject).toLatin1()) << QEvent::FocusIn << fromObject;
-        QTest::newRow(QString("focusOut %1").arg(fromObject).toLatin1()) << QEvent::FocusOut << fromObject;
-        QTest::newRow(QString("keyPress %1").arg(fromObject).toLatin1()) << QEvent::KeyPress << fromObject;
+        const char fromObjectC = fromObject ? '1' : '0';
+        QTest::newRow((QByteArrayLiteral("resize ") + fromObjectC).constData()) << QEvent::Resize << fromObject;
+        QTest::newRow((QByteArrayLiteral("move ") + fromObjectC).constData()) << QEvent::Move << fromObject;
+        QTest::newRow((QByteArrayLiteral("hide ") + fromObjectC).constData()) << QEvent::Hide << fromObject;
+        QTest::newRow((QByteArrayLiteral("show ") + fromObjectC).constData()) << QEvent::Show << fromObject;
+        QTest::newRow((QByteArrayLiteral("enabled ") + fromObjectC).constData()) << QEvent::EnabledChange << fromObject;
+        QTest::newRow((QByteArrayLiteral("focusIn ") + fromObjectC).constData()) << QEvent::FocusIn << fromObject;
+        QTest::newRow((QByteArrayLiteral("focusOut ") + fromObjectC).constData()) << QEvent::FocusOut << fromObject;
+        QTest::newRow((QByteArrayLiteral("keyPress ") + fromObjectC).constData()) << QEvent::KeyPress << fromObject;
     }
 }
 
@@ -762,8 +763,10 @@ void tst_QGraphicsProxyWidget::focusNextPrevChild_data()
                 bool hasWidget = (j == 0);
                 bool hasScene = (k == 0);
                 bool result = hasScene && hasWidget;
-                QString name = QString("Forward: %1, hasWidget: %2, hasScene: %3, result: %4").arg(next).arg(hasWidget).arg(hasScene).arg(result);
-                QTest::newRow(name.toLatin1()) << hasWidget << hasScene << next << result;
+                QByteArray name = QByteArrayLiteral("Forward: ") + (next ? '1' : '0')
+                    + ", hasWidget: " + (hasWidget ? '1' : '0') + ", hasScene: "
+                    + (hasScene ? '1' : '0') + ", result: " + (result ? '1' : '0');
+                QTest::newRow(name.constData()) << hasWidget << hasScene << next << result;
             }
         }
     }
@@ -1028,8 +1031,10 @@ void tst_QGraphicsProxyWidget::hoverMoveEvent_data()
                     bool hoverEnabled = (j == 0);
                     bool mouseTracking = (k == 0);
                     bool mouseDown = (l == 0);
-                    QString name = QString("hasWidget:%1, hover:%2, mouseTracking:%3, mouseDown: %4").arg(hasWidget).arg(hoverEnabled).arg(mouseTracking).arg(mouseDown);
-                    QTest::newRow(name.toLatin1()) << hasWidget << hoverEnabled << mouseTracking << mouseDown;
+                    QByteArray name = QByteArrayLiteral("hasWidget:") + (hasWidget ? '1' : '0') + ", hover:"
+                        + (hoverEnabled ? '1' : '0') + ", mouseTracking:"
+                        + (mouseTracking ? '1' : '0') + ", mouseDown: " + (mouseDown ? '1' : '0');
+                    QTest::newRow(name.constData()) << hasWidget << hoverEnabled << mouseTracking << mouseDown;
                 }
             }
         }
diff --git a/tests/auto/widgets/graphicsview/qgraphicsscene/tst_qgraphicsscene.cpp b/tests/auto/widgets/graphicsview/qgraphicsscene/tst_qgraphicsscene.cpp
index 4a16c8583d..f494e4474c 100644
--- a/tests/auto/widgets/graphicsview/qgraphicsscene/tst_qgraphicsscene.cpp
+++ b/tests/auto/widgets/graphicsview/qgraphicsscene/tst_qgraphicsscene.cpp
@@ -2630,7 +2630,8 @@ void tst_QGraphicsScene::render()
     painter.end();
 
     const QString renderPath = QLatin1String(SRCDIR) + "/testData/render";
-    QString fileName = renderPath + QString("/%1.png").arg(QTest::currentDataTag());
+    QString fileName = renderPath + QLatin1Char('/') + QLatin1String(QTest::currentDataTag())
+        + QLatin1String(".png");
     QImage original(fileName);
     QVERIFY(!original.isNull());
 
diff --git a/tests/auto/widgets/graphicsview/qgraphicsview/tst_qgraphicsview.cpp b/tests/auto/widgets/graphicsview/qgraphicsview/tst_qgraphicsview.cpp
index e1ed9f5e23..c974cd6bec 100644
--- a/tests/auto/widgets/graphicsview/qgraphicsview/tst_qgraphicsview.cpp
+++ b/tests/auto/widgets/graphicsview/qgraphicsview/tst_qgraphicsview.cpp
@@ -587,7 +587,7 @@ void tst_QGraphicsView::sceneRect_growing()
 
     QGraphicsScene scene;
     for (int i = 0; i < 100; ++i)
-        scene.addText(QString("(0, %1)").arg((i - 50) * 20))->setPos(0, (i - 50) * 20);
+        scene.addText(QLatin1String("(0, ") + QString::number((i - 50) * 20))->setPos(0, (i - 50) * 20);
 
     QGraphicsView view(&scene, &toplevel);
     view.setFixedSize(200, 200);
diff --git a/tests/auto/widgets/graphicsview/qgraphicswidget/tst_qgraphicswidget.cpp b/tests/auto/widgets/graphicsview/qgraphicswidget/tst_qgraphicswidget.cpp
index 2f10d8d911..b61610dee3 100644
--- a/tests/auto/widgets/graphicsview/qgraphicswidget/tst_qgraphicswidget.cpp
+++ b/tests/auto/widgets/graphicsview/qgraphicswidget/tst_qgraphicswidget.cpp
@@ -588,7 +588,7 @@ void tst_QGraphicsWidget::focusPolicy_data()
     QTest::addColumn<Qt::FocusPolicy>("focusPolicy2");
 
     for (int i = 0; i < 25; ++i) {
-        QTestData &data = QTest::newRow(QString("%1").arg(i).toLatin1());
+        QTestData &data = QTest::newRow(QByteArray::number(i).constData());
         switch(i % 5) {
         case 0: data << Qt::TabFocus; break;
         case 1: data << Qt::ClickFocus; break;
@@ -1499,7 +1499,7 @@ void tst_QGraphicsWidget::setTabOrderAndReparent()
     for (i = 1; i < 4; ++i) {
         QGraphicsWidget *wid = new QGraphicsWidget;
         wid->setFocusPolicy(Qt::StrongFocus);
-        wid->setData(0, QString::fromLatin1("w%1").arg(i));
+        wid->setData(0, QLatin1Char('w') + QString::number(i));
         scene.addItem(wid);
         if (i == 1)
             w1 = wid;
@@ -1539,7 +1539,7 @@ void tst_QGraphicsWidget::setTabOrderAndReparent()
     for (i = 1; i < 5; ++i) {
         QGraphicsWidget *wid = new QGraphicsWidget;
         wid->setFocusPolicy(Qt::StrongFocus);
-        wid->setData(0, QString::fromLatin1("w%1").arg(i));
+        wid->setData(0, QLatin1Char('w') + QString::number(i));
         scene.addItem(wid);
         if (i == 1)
             w1 = wid;
diff --git a/tests/auto/widgets/itemviews/qabstractitemview/tst_qabstractitemview.cpp b/tests/auto/widgets/itemviews/qabstractitemview/tst_qabstractitemview.cpp
index fac3f5857b..25a154e2a1 100644
--- a/tests/auto/widgets/itemviews/qabstractitemview/tst_qabstractitemview.cpp
+++ b/tests/auto/widgets/itemviews/qabstractitemview/tst_qabstractitemview.cpp
@@ -871,7 +871,7 @@ class DnDTestModel : public QStandardItemModel
 public:
     DnDTestModel() : QStandardItemModel(20, 20), dropAction_result(Qt::IgnoreAction) {
         for (int i = 0; i < rowCount(); ++i)
-            setData(index(i, 0), QString("%1").arg(i));
+            setData(index(i, 0), QString::number(i));
     }
     Qt::DropAction dropAction() const { return dropAction_result; }
 };
@@ -1276,9 +1276,9 @@ void tst_QAbstractItemView::task250754_fontChange()
 
     QStandardItemModel *m = new QStandardItemModel(this);
     for (int i=0; i<20; ++i) {
-        QStandardItem *item = new QStandardItem(QString("Item number %1").arg(i));
+        QStandardItem *item = new QStandardItem(QStringLiteral("Item number ") + QString::number(i));
         for (int j=0; j<5; ++j) {
-            QStandardItem *child = new QStandardItem(QString("Child Item number %1").arg(j));
+            QStandardItem *child = new QStandardItem(QStringLiteral("Child Item number ") + QString::number(j));
             item->setChild(j, 0, child);
         }
         m->setItem(i, 0, item);
@@ -1368,7 +1368,7 @@ void tst_QAbstractItemView::shiftArrowSelectionAfterScrolling()
 {
     QStandardItemModel model;
     for (int i=0; i<10; ++i) {
-        QStandardItem *item = new QStandardItem(QString("%1").arg(i));
+        QStandardItem *item = new QStandardItem(QString::number(i));
         model.setItem(i, 0, item);
     }
 
@@ -1405,7 +1405,7 @@ void tst_QAbstractItemView::shiftSelectionAfterRubberbandSelection()
 {
     QStandardItemModel model;
     for (int i=0; i<3; ++i) {
-        QStandardItem *item = new QStandardItem(QString("%1").arg(i));
+        QStandardItem *item = new QStandardItem(QString::number(i));
         model.setItem(i, 0, item);
     }
 
@@ -1482,7 +1482,7 @@ void tst_QAbstractItemView::ctrlRubberbandSelection()
 {
     QStandardItemModel model;
     for (int i=0; i<3; ++i) {
-        QStandardItem *item = new QStandardItem(QString("%1").arg(i));
+        QStandardItem *item = new QStandardItem(QString::number(i));
         model.setItem(i, 0, item);
     }
 
diff --git a/tests/auto/widgets/itemviews/qcolumnview/tst_qcolumnview.cpp b/tests/auto/widgets/itemviews/qcolumnview/tst_qcolumnview.cpp
index 6645da727c..894058b41a 100644
--- a/tests/auto/widgets/itemviews/qcolumnview/tst_qcolumnview.cpp
+++ b/tests/auto/widgets/itemviews/qcolumnview/tst_qcolumnview.cpp
@@ -112,12 +112,14 @@ public:
         for (int j = 0; j < 10; ++j) {
             QStandardItem *parentItem = invisibleRootItem();
             for (int i = 0; i < 10; ++i) {
-                QStandardItem *item = new QStandardItem(QString("item %0").arg(i));
+                const QString iS =  QString::number(i);
+                const QString itemText = QLatin1String("item ") + iS;
+                QStandardItem *item = new QStandardItem(itemText);
                 parentItem->appendRow(item);
-                QStandardItem *item2 = new QStandardItem(QString("item %0").arg(i));
+                QStandardItem *item2 = new QStandardItem(itemText);
                 parentItem->appendRow(item2);
-                item2->appendRow(new QStandardItem(QString("item %0").arg(i)));
-                parentItem->appendRow(new QStandardItem(QString("file %0").arg(i)));
+                item2->appendRow(new QStandardItem(itemText));
+                parentItem->appendRow(new QStandardItem(QLatin1String("file ") + iS));
                 parentItem = item;
             }
         }
diff --git a/tests/auto/widgets/itemviews/qdatawidgetmapper/tst_qdatawidgetmapper.cpp b/tests/auto/widgets/itemviews/qdatawidgetmapper/tst_qdatawidgetmapper.cpp
index 8b80d52a5f..5b7a2a46ad 100644
--- a/tests/auto/widgets/itemviews/qdatawidgetmapper/tst_qdatawidgetmapper.cpp
+++ b/tests/auto/widgets/itemviews/qdatawidgetmapper/tst_qdatawidgetmapper.cpp
@@ -66,8 +66,10 @@ static QStandardItemModel *testModel(QObject *parent = 0)
     QStandardItemModel *model = new QStandardItemModel(10, 10, parent);
 
     for (int row = 0; row < 10; ++row) {
+        const QString prefix = QLatin1String("item ") + QString::number(row)
+            + QLatin1Char(' ');
         for (int col = 0; col < 10; ++col)
-            model->setData(model->index(row, col), QString("item %1 %2").arg(row).arg(col));
+            model->setData(model->index(row, col), prefix + QString::number(col));
     }
 
     return model;
diff --git a/tests/auto/widgets/itemviews/qheaderview/tst_qheaderview.cpp b/tests/auto/widgets/itemviews/qheaderview/tst_qheaderview.cpp
index 6738ab60df..c85ac101d4 100644
--- a/tests/auto/widgets/itemviews/qheaderview/tst_qheaderview.cpp
+++ b/tests/auto/widgets/itemviews/qheaderview/tst_qheaderview.cpp
@@ -270,7 +270,8 @@ public:
             wrongIndex = true;
             qWarning("Invalid modelIndex [%d,%d,%p]", idx.row(), idx.column(), idx.internalPointer());
         }
-        return QString("[%1,%2,%3]").arg(idx.row()).arg(idx.column()).arg(0);//idx.data());
+        return QLatin1Char('[') + QString::number(idx.row()) + QLatin1Char(',')
+            + QString::number(idx.column()) + QLatin1String(",0]");
     }
 
     void insertOneColumn(int col)
@@ -1567,7 +1568,7 @@ public:
             return QVariant();
         }
         if (role == Qt::DisplayRole) {
-            return QString::fromLatin1("%1,%2").arg(index.row()).arg(index.column());
+            return QString::number(index.row()) + QLatin1Char(',') + QString::number(index.column());
         }
         return QVariant();
     }
@@ -2240,13 +2241,21 @@ void tst_QHeaderView::QTBUG8650_crashOnInsertSections()
     model.insertColumn(0, items);
 }
 
+static void setModelTexts(QStandardItemModel *model)
+{
+    const int columnCount = model->columnCount();
+    for (int i = 0, rowCount = model->rowCount(); i < rowCount; ++i) {
+        const QString prefix = QLatin1String("item [") + QString::number(i) + QLatin1Char(',');
+        for (int j = 0; j < columnCount; ++j)
+            model->setData(model->index(i, j), prefix + QString::number(j) + QLatin1Char(']'));
+    }
+}
+
 void tst_QHeaderView::QTBUG12268_hiddenMovedSectionSorting()
 {
     QTableView view; // ### this test fails on QTableView &view = *m_tableview; !? + shadowing view member
     QStandardItemModel *model = new QStandardItemModel(4,3, &view);
-    for (int i = 0; i< model->rowCount(); ++i)
-        for (int j = 0; j< model->columnCount(); ++j)
-            model->setData(model->index(i,j), QString("item [%1,%2]").arg(i).arg(j));
+    setModelTexts(model);
     view.setModel(model);
     view.horizontalHeader()->setSectionsMovable(true);
     view.setSortingEnabled(true);
@@ -2322,9 +2331,7 @@ void tst_QHeaderView::initialSortOrderRole()
 {
     QTableView view; // ### Shadowing member view (of type QHeaderView)
     QStandardItemModel *model = new QStandardItemModel(4, 3, &view);
-    for (int i = 0; i< model->rowCount(); ++i)
-        for (int j = 0; j< model->columnCount(); ++j)
-            model->setData(model->index(i,j), QString("item [%1,%2]").arg(i).arg(j));
+    setModelTexts(model);
     QStandardItem *ascendingItem = new QStandardItem();
     QStandardItem *descendingItem = new QStandardItem();
     ascendingItem->setData(Qt::AscendingOrder, Qt::InitialSortOrderRole);
diff --git a/tests/auto/widgets/itemviews/qitemview/tst_qitemview.cpp b/tests/auto/widgets/itemviews/qitemview/tst_qitemview.cpp
index 8fd86ea467..64919581c3 100644
--- a/tests/auto/widgets/itemviews/qitemview/tst_qitemview.cpp
+++ b/tests/auto/widgets/itemviews/qitemview/tst_qitemview.cpp
@@ -288,14 +288,16 @@ void tst_QItemView::populate()
     const int baseInsert = 26;
 #endif
     for (int i = 0; i < 40; ++i) {
+        const QString iS = QString::number(i);
         parent = treeModel->index(0, 0, parent);
         treeModel->insertRows(0, baseInsert + i, parent);
         treeModel->insertColumns(0, baseInsert + i, parent);
         // Fill in some values to make it easier to debug
         for (int x = 0; x < treeModel->rowCount(); ++x) {
+            const QString xS = QString::number(x);
             for (int y = 0; y < treeModel->columnCount(); ++y) {
                 QModelIndex index = treeModel->index(x, y, parent);
-                treeModel->setData(index, QString("%1_%2_%3").arg(x).arg(y).arg(i));
+                treeModel->setData(index, xS + QLatin1Char('_') + QString::number(y) + QLatin1Char('_') + iS);
                 treeModel->setData(index, QVariant(QColor(Qt::blue)), Qt::TextColorRole);
             }
         }
diff --git a/tests/auto/widgets/itemviews/qlistview/tst_qlistview.cpp b/tests/auto/widgets/itemviews/qlistview/tst_qlistview.cpp
index b7804da4ad..50309ecd84 100644
--- a/tests/auto/widgets/itemviews/qlistview/tst_qlistview.cpp
+++ b/tests/auto/widgets/itemviews/qlistview/tst_qlistview.cpp
@@ -74,6 +74,15 @@ static inline void setFrameless(QWidget *w)
     w->setWindowFlags(flags);
 }
 
+static QStringList generateList(const QString &prefix, int size)
+{
+    QStringList result;
+    result.reserve(size);
+    for (int i = 0; i < size; ++i)
+        result.append(prefix + QString::number(i));
+    return result;
+}
+
 class tst_QListView : public QObject
 {
     Q_OBJECT
@@ -255,7 +264,7 @@ public:
             wrongIndex = true;
             qWarning("got invalid modelIndex %d/%d", idx.row(), idx.column());
         }
-        return QString("%1/%2").arg(idx.row()).arg(idx.column());
+        return QString::number(idx.row()) + QLatin1Char('/') + QString::number(idx.column());
     }
 
     void removeLastRow()
@@ -364,10 +373,11 @@ void tst_QListView::cursorMove()
     view.setModel(&model);
 
     for (int j = 0; j < columns; ++j) {
+        const QString postfix = QLatin1Char(',') + QString::number(j) + QLatin1Char(']');
         view.setModelColumn(j);
         for (int i = 0; i < rows; ++i) {
             QModelIndex index = model.index(i, j);
-            model.setData(index, QString("[%1,%2]").arg(i).arg(j));
+            model.setData(index, QLatin1Char('[') + QString::number(i) + postfix);
             view.setCurrentIndex(index);
             QApplication::processEvents();
             QCOMPARE(view.currentIndex(), index);
@@ -468,7 +478,7 @@ void tst_QListView::hideRows()
     QStandardItemModel sim(0);
     QStandardItem *root = new QStandardItem("Root row");
     for (int i=0;i<5;i++)
-        root->appendRow(new QStandardItem(QString("Row %1").arg(i)));
+        root->appendRow(new QStandardItem(QLatin1String("Row ") + QString::number(i)));
     sim.appendRow(root);
     view.setModel(&sim);
     view.setRootIndex(root->index());
@@ -702,9 +712,11 @@ void tst_QListView::singleSelectionRemoveColumn()
     int numCols = 3;
     int numRows = 3;
     QStandardItemModel model(numCols, numRows);
-    for (int r = 0; r < numRows; ++r)
+    for (int r = 0; r < numRows; ++r) {
+        const QString prefix = QString::number(r) + QLatin1Char(',');
         for (int c = 0; c < numCols; ++c)
-            model.setData(model.index(r, c), QString("%1,%2").arg(r).arg(c));
+            model.setData(model.index(r, c), prefix + QString::number(c));
+    }
 
     QListView view;
     view.setModel(&model);
@@ -729,10 +741,11 @@ void tst_QListView::modelColumn()
     int numCols = 3;
     int numRows = 3;
     QStandardItemModel model(numCols, numRows);
-    for (int r = 0; r < numRows; ++r)
+    for (int r = 0; r < numRows; ++r) {
+        const QString prefix = QString::number(r) + QLatin1Char(',');
         for (int c = 0; c < numCols; ++c)
-            model.setData(model.index(r, c), QString("%1,%2").arg(r).arg(c));
-
+            model.setData(model.index(r, c), prefix + QString::number(c));
+    }
 
     QListView view;
     view.setModel(&model);
@@ -811,10 +824,7 @@ void tst_QListView::batchedMode()
 {
     const int rowCount = 3;
 
-    QStringList items;
-    for (int i = 0; i < rowCount; ++i)
-        items << QLatin1String("item ") + QString::number(i);
-    QStringListModel model(items);
+    QStringListModel model(generateList(QLatin1String("item "), rowCount));
 
     QListView view;
     view.setWindowTitle(QTest::currentTestFunction());
@@ -840,11 +850,7 @@ void tst_QListView::batchedMode()
 
 void tst_QListView::setCurrentIndex()
 {
-    QStringList items;
-    int i;
-    for (i=0; i <20; ++i)
-        items << QString("item %1").arg(i);
-    QStringListModel model(items);
+    QStringListModel model(generateList(QLatin1String("item "), 20));
 
     QListView view;
     view.setModel(&model);
@@ -866,7 +872,7 @@ void tst_QListView::setCurrentIndex()
             int offset = sb->value();
 
             // first "scroll" down, verify that we scroll one step at a time
-            i = 0;
+            int i = 0;
             for (i = 0; i < 20; ++i) {
                 QModelIndex idx = model.index(i,0);
                 view.setCurrentIndex(idx);
@@ -1289,7 +1295,7 @@ void tst_QListView::scrollBarRanges()
     QStringListModel model(&lv);
     QStringList list;
     for (int i = 0; i < rowCount; ++i)
-        list << QString::fromLatin1("Item %1").arg(i);
+        list << QLatin1String("Item ") + QString::number(i);
 
     model.setStringList(list);
     lv.setModel(&model);
@@ -1387,17 +1393,13 @@ void tst_QListView::scrollBarAsNeeded()
         QStringList list;
         int i;
         for (i = 0; i < rowCounts[r]; ++i)
-            list << QString::fromLatin1("Item %1").arg(i);
+            list << QLatin1String("Item ") + QString::number(i);
 
         model.setStringList(list);
         QApplication::processEvents();
         QTest::qWait(50);
 
-        QStringList replacement;
-        for (i = 0; i < itemCount; ++i) {
-            replacement << QString::fromLatin1("Item %1").arg(i);
-        }
-        model.setStringList(replacement);
+        model.setStringList(generateList(QLatin1String("Item "), itemCount));
 
         QApplication::processEvents();
 
@@ -1410,10 +1412,9 @@ void tst_QListView::moveItems()
 {
     QStandardItemModel model;
     for (int r = 0; r < 4; ++r) {
-        for (int c = 0; c < 4; ++c) {
-            QStandardItem* item = new QStandardItem(QString("standard item (%1,%2)").arg(r).arg(c));
-            model.setItem(r, c, item);
-        }
+        const QString prefix = QLatin1String("standard item (") + QString::number(r) + QLatin1Char(',');
+        for (int c = 0; c < 4; ++c)
+            model.setItem(r, c, new QStandardItem(prefix + QString::number(c) + QLatin1Char(')')));
     }
 
     PublicListView view;
@@ -1525,9 +1526,10 @@ void tst_QListView::emptyItemSize()
 {
     QStandardItemModel model;
     for (int r = 0; r < 4; ++r) {
-        QStandardItem* item = new QStandardItem(QString("standard item (%1)").arg(r));
-        model.setItem(r, 0, item);
+        const QString text = QLatin1String("standard item (") + QString::number(r) + QLatin1Char(')');
+        model.setItem(r, new QStandardItem(text));
     }
+
     model.setItem(4, 0, new QStandardItem());
 
     PublicListView view;
@@ -1994,12 +1996,7 @@ public:
 
 void tst_QListView::taskQTBUG_9455_wrongScrollbarRanges()
 {
-    QStringList list;
-    const int nrItems = 8;
-    for (int i = 0; i < nrItems; i++)
-        list << QString::asprintf("item %d", i);
-
-    QStringListModel model(list);
+    QStringListModel model(generateList("item ", 8));
     ListView_9455 w;
     setFrameless(&w);
     w.setModel(&model);
diff --git a/tests/auto/widgets/itemviews/qlistwidget/tst_qlistwidget.cpp b/tests/auto/widgets/itemviews/qlistwidget/tst_qlistwidget.cpp
index ecf72613da..7b5fd34f44 100644
--- a/tests/auto/widgets/itemviews/qlistwidget/tst_qlistwidget.cpp
+++ b/tests/auto/widgets/itemviews/qlistwidget/tst_qlistwidget.cpp
@@ -230,7 +230,7 @@ void tst_QListWidget::populate()
 void tst_QListWidget::addItem()
 {
     int count = testWidget->count();
-    QString label = QString("%1").arg(count);
+    const QString label = QString::number(count);
     testWidget->addItem(label);
     QCOMPARE(testWidget->count(), ++count);
     QCOMPARE(testWidget->item(testWidget->count()-1)->text(), label);
@@ -244,7 +244,7 @@ void tst_QListWidget::addItem2()
     testWidget->addItem(0);
     QCOMPARE(testWidget->count(), count);
 
-    QListWidgetItem *item = new QListWidgetItem(QString("%1").arg(count));
+    QListWidgetItem *item = new QListWidgetItem(QString::number(count));
     item->setFlags(item->flags() | Qt::ItemIsEditable);
     testWidget->addItem(item);
     QCOMPARE(testWidget->count(), ++count);
@@ -261,10 +261,10 @@ void tst_QListWidget::addItems()
     QCOMPARE(testWidget->count(), count);
 
     QStringList stringList;
-    QString label = QString("%1").arg(count);
-    stringList << QString("%1").arg(testWidget->count() + 1)
-               << QString("%1").arg(testWidget->count() + 2)
-               << QString("%1").arg(testWidget->count() + 3)
+    QString label = QString::number(count);
+    stringList << QString::number(testWidget->count() + 1)
+               << QString::number(testWidget->count() + 2)
+               << QString::number(testWidget->count() + 3)
                << label;
     testWidget->addItems(stringList);
     QCOMPARE(testWidget->count(), count + stringList.count());
@@ -276,7 +276,7 @@ void tst_QListWidget::openPersistentEditor()
 {
     // Boundary checking
     testWidget->openPersistentEditor(0);
-    QListWidgetItem *item = new QListWidgetItem(QString("%1").arg(testWidget->count()));
+    QListWidgetItem *item = new QListWidgetItem(QString::number(testWidget->count()));
     testWidget->openPersistentEditor(item);
 
     int childCount = testWidget->viewport()->children().count();
@@ -290,7 +290,7 @@ void tst_QListWidget::closePersistentEditor()
     // Boundary checking
     int childCount = testWidget->viewport()->children().count();
     testWidget->closePersistentEditor(0);
-    QListWidgetItem *item = new QListWidgetItem(QString("%1").arg(testWidget->count()));
+    QListWidgetItem *item = new QListWidgetItem(QString::number(testWidget->count()));
     testWidget->closePersistentEditor(item);
     QCOMPARE(childCount, testWidget->viewport()->children().count());
 
@@ -316,7 +316,7 @@ void tst_QListWidget::setItemHidden()
         if (testWidget->isItemHidden(testWidget->item(i)))
             totalHidden++;
 
-    QListWidgetItem *item = new QListWidgetItem(QString("%1").arg(testWidget->count()));
+    QListWidgetItem *item = new QListWidgetItem(QString::number(testWidget->count()));
     testWidget->addItem(item);
 
     // Check that nothing else changed
@@ -362,7 +362,7 @@ void tst_QListWidget::setCurrentItem()
 {
     QFETCH(int, fill);
     for (int i = 0; i < fill; ++i)
-        testWidget->addItem(QString("%1").arg(i));
+        testWidget->addItem(QString::number(i));
 
     // Boundary checking
     testWidget->setCurrentItem((QListWidgetItem *)0);
@@ -394,7 +394,7 @@ void tst_QListWidget::setCurrentRow()
 {
     QFETCH(int, fill);
     for (int i = 0; i < fill; ++i)
-        testWidget->addItem(QString("%1").arg(i));
+        testWidget->addItem(QString::number(i));
 
     // Boundary checking
     testWidget->setCurrentRow(-1);
@@ -455,7 +455,7 @@ void tst_QListWidget::editItem()
 {
     // Boundary checking
     testWidget->editItem(0);
-    QListWidgetItem *item = new QListWidgetItem(QString("%1").arg(testWidget->count()));
+    QListWidgetItem *item = new QListWidgetItem(QString::number(testWidget->count()));
     testWidget->editItem(item);
 
     QFETCH(bool, editable);
@@ -650,7 +650,7 @@ void tst_QListWidget::item()
         QCOMPARE(item, static_cast<QListWidgetItem*>(0));
         QCOMPARE(testWidget->count(), 3);
     } else {
-        QCOMPARE(item->text(), QString("item%1").arg(row));
+        QCOMPARE(item->text(), QStringLiteral("item") + QString::number(row));
         QCOMPARE(testWidget->count(), 3);
     }
 }
@@ -683,7 +683,7 @@ void tst_QListWidget::takeItem()
         QCOMPARE(item, static_cast<QListWidgetItem*>(0));
         QCOMPARE(testWidget->count(), 3);
     } else {
-        QCOMPARE(item->text(), QString("item%1").arg(row));
+        QCOMPARE(item->text(), QStringLiteral("item") + QString::number(row));
         QCOMPARE(testWidget->count(), 2);
     }
 
@@ -746,7 +746,7 @@ void tst_QListWidget::selectedItems()
 
     //insert items
     for (int i=0; i<itemCount; ++i)
-        new QListWidgetItem(QString("Item%1").arg(i), testWidget);
+        new QListWidgetItem(QStringLiteral("Item") + QString::number(i), testWidget);
 
     //test the selection
     testWidget->setSelectionMode(QListWidget::SingleSelection);
@@ -1245,8 +1245,8 @@ void tst_QListWidget::insertItemsWithSorting_data()
         QStringList ascendingItems;
         QStringList reverseItems;
         for (int i = 'a'; i <= 'z'; ++i) {
-            ascendingItems << QString("%0").arg(QLatin1Char(i));
-            reverseItems << QString("%0").arg(QLatin1Char('z' - i + 'a'));
+            ascendingItems << QString(1, QLatin1Char(i));
+            reverseItems << QString(1, QLatin1Char('z' - i + 'a'));
             ascendingRows << i - 'a';
             reverseRows << 'z' - i + 'a';
         }
@@ -1490,7 +1490,7 @@ void tst_QListWidget::fastScroll()
     QWidget topLevel;
     MyListWidget widget(&topLevel);
     for (int i = 0; i < 50; ++i)
-        widget.addItem(QString("Item %1").arg(i));
+        widget.addItem(QStringLiteral("Item ") + QString::number(i));
 
     topLevel.resize(300, 300); // toplevel needs to be wide enough for the item
     topLevel.show();
diff --git a/tests/auto/widgets/itemviews/qtableview/tst_qtableview.cpp b/tests/auto/widgets/itemviews/qtableview/tst_qtableview.cpp
index 999445096c..45dab3f2c1 100644
--- a/tests/auto/widgets/itemviews/qtableview/tst_qtableview.cpp
+++ b/tests/auto/widgets/itemviews/qtableview/tst_qtableview.cpp
@@ -325,8 +325,10 @@ public:
             return QVariant();
         }
 
-        if (role == Qt::DisplayRole || role == Qt::EditRole)
-            return QString("[%1,%2,%3]").arg(idx.row()).arg(idx.column()).arg(0);
+        if (role == Qt::DisplayRole || role == Qt::EditRole) {
+            return QLatin1Char('[') + QString::number(idx.row()) + QLatin1Char(',')
+                + QString::number(idx.column()) + QLatin1String(",0]");
+        }
 
         return QVariant();
     }
@@ -3802,7 +3804,7 @@ public:
                           int role = Qt::DisplayRole) const
     {
         if (role == Qt::DisplayRole)
-            return QString("%1 - %2").arg(index.column()).arg(index.row());
+            return QString::number(index.column()) + QLatin1String(" - ") + QString::number(index.row());
         return QVariant();
     }
 
@@ -3924,12 +3926,12 @@ void tst_QTableView::task227953_setRootIndex()
 
     //setup the first table as a child of the first item
     for ( int row = 0; row < 40; ++row ) {
-        item1.appendRow(QList<QStandardItem*>() << new QStandardItem(QString("row %0").arg(row)));
+        item1.appendRow(QList<QStandardItem*>() << new QStandardItem(QLatin1String("row ") + QString::number(row)));
     }
 
     //setup the second table as a child of the second item
     for ( int row = 0; row < 10; ++row ) {
-        item2.appendRow(QList<QStandardItem*>() << new QStandardItem(QString("row %0").arg(row)));
+        item2.appendRow(QList<QStandardItem*>() << new QStandardItem(QLatin1String("row ") + QString::number(row)));
     }
 
     tableView.setModel(&model);
diff --git a/tests/auto/widgets/itemviews/qtablewidget/tst_qtablewidget.cpp b/tests/auto/widgets/itemviews/qtablewidget/tst_qtablewidget.cpp
index ea31fd19dd..db3cf8082d 100644
--- a/tests/auto/widgets/itemviews/qtablewidget/tst_qtablewidget.cpp
+++ b/tests/auto/widgets/itemviews/qtablewidget/tst_qtablewidget.cpp
@@ -1473,7 +1473,7 @@ void tst_QTableWidget::task262056_sortDuplicate()
     for (int i = 0; i<8; i++ ) {
         QTableWidgetItem *twi = new QTableWidgetItem(items.at(i));
         testWidget->setItem(i,0,twi);
-        testWidget->setItem(i,1,new QTableWidgetItem(QString("item %1").arg(i)));
+        testWidget->setItem(i,1,new QTableWidgetItem(QLatin1String("item ") + QString::number(i)));
     }
     testWidget->sortItems(0, Qt::AscendingOrder);
     QSignalSpy layoutChangedSpy(testWidget->model(), SIGNAL(layoutChanged()));
diff --git a/tests/auto/widgets/itemviews/qtreeview/tst_qtreeview.cpp b/tests/auto/widgets/itemviews/qtreeview/tst_qtreeview.cpp
index 7c808b9655..bdbd4e9941 100644
--- a/tests/auto/widgets/itemviews/qtreeview/tst_qtreeview.cpp
+++ b/tests/auto/widgets/itemviews/qtreeview/tst_qtreeview.cpp
@@ -338,9 +338,12 @@ public:
                 qWarning("Invalid modelIndex [%d,%d,%p]", idx.row(), idx.column(),
                          idx.internalPointer());
             }
+            QString result = QLatin1Char('[') + QString::number(idx.row()) + QLatin1Char(',')
+                + QString::number(idx.column()) + QLatin1Char(',') +  QString::number(level(idx))
+                + QLatin1Char(']');
             if (idx.row() & 1)
-                return QString("[%1,%2,%3] - this item is extra wide").arg(idx.row()).arg(idx.column()).arg(level(idx));
-            return QString("[%1,%2,%3]").arg(idx.row()).arg(idx.column()).arg(level(idx));
+                result += QLatin1String(" - this item is extra wide");
+            return result;
         }
         if (decorationsEnabled && role == Qt::DecorationRole) {
             QPixmap pm(16,16);
@@ -2084,13 +2087,14 @@ void tst_QTreeView::rowsAboutToBeRemoved()
 {
     QStandardItemModel model(3, 1);
     for (int i = 0; i < model.rowCount(); i++) {
+        const QString iS = QString::number(i);
         QModelIndex index = model.index(i, 0, QModelIndex());
-        model.setData(index, QString("%1").arg(i));
+        model.setData(index, iS);
         model.insertRows(0, 4, index);
         model.insertColumns(0,1,index);
         for (int i1 = 0; i1 <  model.rowCount(index); i1++) {
             QModelIndex index2 = model.index(i1, 0, index);
-            model.setData(index2, QString("%1%2").arg(i).arg(i1));
+            model.setData(index2, iS + QString::number(i1));
         }
     }
 
@@ -2228,14 +2232,16 @@ void tst_QTreeView::resizeColumnToContents()
 {
     QStandardItemModel model(50,2);
     for (int r = 0; r < model.rowCount(); ++r) {
+        const QString rS = QString::number(r);
         for (int c = 0; c < model.columnCount(); ++c) {
             QModelIndex idx = model.index(r, c);
-            model.setData(idx, QString::fromLatin1("%1,%2").arg(r).arg(c) );
+            model.setData(idx, rS + QLatin1Char(',') + QString::number(c));
             model.insertColumns(0, 2, idx);
             model.insertRows(0, 6, idx);
             for (int i = 0; i < 6; ++i) {
+                const QString iS = QString::number(i);
                 for (int j = 0; j < 2 ; ++j) {
-                    model.setData(model.index(i, j, idx), QString::fromLatin1("child%1%2").arg(i).arg(j));
+                    model.setData(model.index(i, j, idx), QLatin1String("child") + iS + QString::number(j));
                 }
             }
         }
@@ -2390,7 +2396,7 @@ void tst_QTreeView::selectionWithHiddenItems()
 {
     QStandardItemModel model;
     for (int i = 0; i < model.rowCount(); ++i)
-        model.setData(model.index(i,0), QString("row %1").arg(i));
+        model.setData(model.index(i,0), QLatin1String("row ") + QString::number(i));
 
     QStandardItem item0("row 0");
     QStandardItem item1("row 1");
@@ -2464,7 +2470,7 @@ void tst_QTreeView::selectAll()
     QCOMPARE(view2.selectedIndexes().count(), model.rowCount() * model.columnCount());
 
     for (int i = 0; i < model.rowCount(); ++i)
-        model.setData(model.index(i,0), QString("row %1").arg(i));
+        model.setData(model.index(i,0), QLatin1String("row ") + QString::number(i));
     PublicView view;
     view.setModel(&model);
     int selectedCount = view.selectedIndexes().count();
@@ -2818,8 +2824,9 @@ public:
                 if (parentNode->isDead)
                     qFatal("%s: grandparentNode is dead!", Q_FUNC_INFO);
             }
-            return QString("[%1,%2,%3]").arg(idx.row()).arg(idx.column())
-                .arg(parentNode->isDead ? "dead" : "alive");
+            return QLatin1Char('[') + QString::number(idx.row()) + QLatin1Char(',')
+                + QString::number(idx.column()) + QLatin1Char(',')
+                + QLatin1String(parentNode->isDead ? "dead" : "alive") + QLatin1Char(']');
         }
         return QVariant();
     }
@@ -3022,7 +3029,7 @@ void tst_QTreeView::filterProxyModelCrash()
     QStandardItemModel model;
     QList<QStandardItem *> items;
     for (int i = 0; i < 100; i++)
-        items << new QStandardItem(QString::fromLatin1("item %1").arg(i));
+        items << new QStandardItem(QLatin1String("item ") + QString::number(i));
     model.appendColumn(items);
 
     QSortFilterProxyModel proxy;
@@ -3389,11 +3396,11 @@ void tst_QTreeView::task203696_hidingColumnsAndRowsn()
 {
     QTreeView view;
     QStandardItemModel *model = new QStandardItemModel(0, 3, &view);
-    for (int i = 0; i < 3; ++i)
-    {
+    for (int i = 0; i < 3; ++i) {
+        const QString prefix = QLatin1String("row ") + QString::number(i) + QLatin1String(" col ");
         model->insertRow(model->rowCount());
         for (int j = 0; j < model->columnCount(); ++j)
-            model->setData(model->index(i, j), QString("row %1 col %2").arg(i).arg(j));
+            model->setData(model->index(i, j), prefix + QString::number(j));
     }
     view.setModel(model);
     view.show();
@@ -3415,8 +3422,9 @@ void tst_QTreeView::addRowsWhileSectionsAreHidden()
         for (i = 0; i < 3; ++i)
         {
             model->insertRow(model->rowCount());
+            const QString prefix = QLatin1String("row ") + QString::number(i) + QLatin1String(" col ");
             for (int j = 0; j < model->columnCount(); ++j) {
-                model->setData(model->index(i, j), QString("row %1 col %2").arg(i).arg(j));
+                model->setData(model->index(i, j), prefix + QString::number(j));
             }
         }
         int col;
@@ -3425,8 +3433,9 @@ void tst_QTreeView::addRowsWhileSectionsAreHidden()
         for (i = 3; i < 6; ++i)
         {
             model->insertRow(model->rowCount());
+            const QString prefix = QLatin1String("row ") + QString::number(i) + QLatin1String(" col ");
             for (int j = 0; j < model->columnCount(); ++j) {
-                model->setData(model->index(i, j), QString("row %1 col %2").arg(i).arg(j));
+                model->setData(model->index(i, j), prefix + QString::number(j));
             }
         }
         for (col = 0; col < pass; ++col)
@@ -3480,8 +3489,10 @@ void tst_QTreeView::task220298_selectColumns()
 
             virtual QVariant data ( const QModelIndex & index, int role = Qt::DisplayRole ) const
             {
-                if(role == Qt::DisplayRole)
-                    return QVariant(QString("%1-%2").arg(index.column()).arg(index.row()));
+                if (role == Qt::DisplayRole) {
+                    return QVariant(QString::number(index.column()) + QLatin1Char('-')
+                        + QString::number(index.row()));
+                }
                 return QVariant();
             }
 
@@ -3519,7 +3530,7 @@ void tst_QTreeView::task224091_appendColumns()
 
     QList<QStandardItem *> projlist;
     for (int k = 0; k < 10; ++k)
-        projlist.append(new QStandardItem(QString("Top Level %0").arg(k)));
+        projlist.append(new QStandardItem(QLatin1String("Top Level ") + QString::number(k)));
     model->appendColumn(projlist);
     model->invisibleRootItem()->appendRow(new QStandardItem("end"));
 
@@ -3746,7 +3757,7 @@ void tst_QTreeView::task246536_scrollbarsNotWorking()
     QVERIFY(QTest::qWaitForWindowExposed(&tree));
     QList<QStandardItem *> items;
     for(int i=0; i<100; ++i){
-        items << new QStandardItem(QString::fromLatin1("item %1").arg(i));
+        items << new QStandardItem(QLatin1String("item ") + QString::number(i));
     }
     model.invisibleRootItem()->appendColumn(items);
     QTest::qWait(100);
@@ -3934,7 +3945,8 @@ void tst_QTreeView::taskQTBUG_6450_selectAllWith1stColumnHidden()
     QList<QTreeWidgetItem *> items;
     const int nrRows = 10;
     for (int i = 0; i < nrRows; ++i) {
-        items.append(new QTreeWidgetItem((QTreeWidget*)0, QStringList(QString("item: %1").arg(i))));
+        const QString text = QLatin1String("item: ") + QString::number(i);
+        items.append(new QTreeWidgetItem((QTreeWidget*)0, QStringList(text)));
         items.last()->setText(1, QString("is an item"));
     }
     tree.insertTopLevelItems(0, items);
@@ -3965,9 +3977,11 @@ public:
 void tst_QTreeView::taskQTBUG_9216_setSizeAndUniformRowHeightsWrongRepaint()
 {
     QStandardItemModel model(10, 10, this);
-    for (int row = 0; row < 10; row++)
+    for (int row = 0; row < 10; row++) {
+        const QString prefix = QLatin1String("row ") + QString::number(row) + QLatin1String(", col ");
         for (int col = 0; col < 10; col++)
-            model.setItem(row, col, new QStandardItem(QString("row %0, col %1").arg(row).arg(col)));
+            model.setItem(row, col, new QStandardItem(prefix + QString::number(col)));
+    }
     TreeViewQTBUG_9216 view;
     view.setUniformRowHeights(true);
     view.setModel(&model);
@@ -4340,9 +4354,10 @@ void tst_QTreeView::taskQTBUG_37813_crash()
     treeWidget.setColumnCount(2);
     QList<QTreeWidgetItem *> items;
     for (int r = 0; r < 2; ++r) {
+        const QString prefix = QLatin1String("Row ") + QString::number(r) + QLatin1String(" Column ");
         QTreeWidgetItem *item = new QTreeWidgetItem();
         for (int c = 0; c < treeWidget.columnCount(); ++c)
-            item->setText(c, QString::fromLatin1("Row %1 Column %2").arg(r).arg(c));
+            item->setText(c, prefix + QString::number(c));
         items.append(item);
     }
     treeWidget.addTopLevelItems(items);
diff --git a/tests/auto/widgets/itemviews/qtreewidget/tst_qtreewidget.cpp b/tests/auto/widgets/itemviews/qtreewidget/tst_qtreewidget.cpp
index afc61025ba..1acdc103bd 100644
--- a/tests/auto/widgets/itemviews/qtreewidget/tst_qtreewidget.cpp
+++ b/tests/auto/widgets/itemviews/qtreewidget/tst_qtreewidget.cpp
@@ -320,7 +320,7 @@ void tst_QTreeWidget::addTopLevelItem()
         for (int i = 0; i < 100; i += count) {
             tops.clear();
             for (int j = 0; j < count; ++j)
-                tops << new TreeItem(QStringList() << QString("%0").arg(j));
+                tops << new TreeItem(QStringList(QString::number(j)));
             tree.addTopLevelItems(tops);
             QCOMPARE(tree.topLevelItemCount(), count + i);
             for (int j = 0; j < count; ++j)
@@ -511,10 +511,10 @@ void tst_QTreeWidget::takeItem()
 
     for (int i=0; i<3; ++i) {
         QTreeWidgetItem *top = new QTreeWidgetItem(testWidget);
-        top->setText(0, QString("top%1").arg(i));
+        top->setText(0, QStringLiteral("top") + QString::number(i));
         for (int j=0; j<3; ++j) {
             QTreeWidgetItem *child = new QTreeWidgetItem(top);
-            child->setText(0, QString("child%1").arg(j));
+            child->setText(0, QStringLiteral("child") + QString::number(j));
         }
     }
 
@@ -528,7 +528,7 @@ void tst_QTreeWidget::takeItem()
             QCOMPARE(item, (QTreeWidgetItem *)0);
             QCOMPARE(count, testWidget->topLevelItemCount());
         } else {
-            QCOMPARE(item->text(0), QString("top%1").arg(index));
+            QCOMPARE(item->text(0), QStringLiteral("top") + QString::number(index));
             QCOMPARE(count-1, testWidget->topLevelItemCount());
             delete item;
         }
@@ -539,7 +539,7 @@ void tst_QTreeWidget::takeItem()
             QCOMPARE(item, (QTreeWidgetItem *)0);
             QCOMPARE(count, testWidget->topLevelItem(0)->childCount());
         } else {
-            QCOMPARE(item->text(0), QString("child%1").arg(index));
+            QCOMPARE(item->text(0), QStringLiteral("child") + QString::number(index));
             QCOMPARE(count-1, testWidget->topLevelItem(0)->childCount());
             delete item;
         }
@@ -794,10 +794,11 @@ void tst_QTreeWidget::selectedItems()
     // create items
     for (int t=0; t<topLevel; ++t) {
         QTreeWidgetItem *top = new QTreeWidgetItem(testWidget);
-        top->setText(0, QString("top%1").arg(t));
+        const QString topS = QLatin1String("top") + QString::number(t);
+        top->setText(0, topS);
         for (int c=0; c<children; ++c) {
             QTreeWidgetItem *child = new QTreeWidgetItem(top);
-            child->setText(0, QString("top%1child%2").arg(t).arg(c));
+            child->setText(0, topS + QLatin1String("child") + QString::number(c));
         }
     }
 
@@ -1442,11 +1443,10 @@ static void fillTreeWidget(QTreeWidgetItem *parent, int rows)
 {
     const int columns = parent->treeWidget()->columnCount();
     for (int r = 0; r < rows; ++r) {
+        const QString prefix = QLatin1String("[r:") + QString::number(r) + QLatin1String(",c:");
         QTreeWidgetItem *w = new QTreeWidgetItem(parent);
-        for ( int c = 0; c < columns; ++c ) {
-            QString s = QString("[r:%1,c:%2]").arg(r).arg(c);
-            w->setText(c, s);
-        }
+        for (int c = 0; c < columns; ++c)
+            w->setText(c, prefix + QString::number(c) + QLatin1Char(']'));
         fillTreeWidget(w, rows - r - 1);
     }
 }
@@ -1455,10 +1455,9 @@ static void fillTreeWidget(QTreeWidget *tree, int rows)
 {
     for (int r = 0; r < rows; ++r) {
         QTreeWidgetItem *w = new QTreeWidgetItem();
-        for ( int c = 0; c < tree->columnCount(); ++c ) {
-            QString s = QString("[r:%1,c:%2]").arg(r).arg(c);
-            w->setText(c, s);
-        }
+        const QString prefix = QLatin1String("[r:") + QString::number(r) + QLatin1String(",c:");
+        for (int c = 0; c < tree->columnCount(); ++c)
+            w->setText(c, prefix + QString::number(c) + QLatin1Char(']'));
         tree->insertTopLevelItem(r, w);
         fillTreeWidget(w, rows - r - 1);
     }
@@ -1555,7 +1554,7 @@ void tst_QTreeWidget::keyboardNavigation()
         }
 
         QTreeWidgetItem *current = testWidget->currentItem();
-        QCOMPARE(current->text(0), QString("[r:%1,c:0]").arg(row));
+        QCOMPARE(current->text(0), QLatin1String("[r:") + QString::number(row) + QLatin1String(",c:0]"));
         if (current->parent())
             QCOMPARE(current->parent()->indexOfChild(current), row);
         else
@@ -1696,7 +1695,7 @@ void tst_QTreeWidget::addChild()
         for (int i = 0; i < 100; i += count) {
             QList<QTreeWidgetItem*> list;
             for (int j = 0; j < count; ++j)
-                list << new QTreeWidgetItem(QStringList() << QString("%0").arg(j));
+                list << new QTreeWidgetItem(QStringList(QString::number(j)));
             item->addChildren(list);
             QCOMPARE(item->childCount(), count + i);
             for (int j = 0; j < count; ++j) {
@@ -1743,7 +1742,8 @@ void tst_QTreeWidget::setData()
             for (int i = 1; i <= 2; ++i) {
                 for (int j = 0; j < 5; ++j) {
                     QVariantList args;
-                    QString text = QString("text %0").arg(i);
+                    const QString iS = QString::number(i);
+                    const QString text = QLatin1String("text ") + iS;
                     item->setText(j, text);
                     QCOMPARE(item->text(j), text);
                     QCOMPARE(itemChangedSpy.count(), 1);
@@ -1765,7 +1765,7 @@ void tst_QTreeWidget::setData()
                     item->setIcon(j, icon);
                     QCOMPARE(itemChangedSpy.count(), 0);
 
-                    QString toolTip = QString("toolTip %0").arg(i);
+                    const QString toolTip = QLatin1String("toolTip ") + iS;
                     item->setToolTip(j, toolTip);
                     QCOMPARE(item->toolTip(j), toolTip);
                     QCOMPARE(itemChangedSpy.count(), 1);
@@ -1775,7 +1775,7 @@ void tst_QTreeWidget::setData()
                     item->setToolTip(j, toolTip);
                     QCOMPARE(itemChangedSpy.count(), 0);
 
-                    QString statusTip = QString("statusTip %0").arg(i);
+                    const QString statusTip = QLatin1String("statusTip ") + iS;
                     item->setStatusTip(j, statusTip);
                     QCOMPARE(item->statusTip(j), statusTip);
                     QCOMPARE(itemChangedSpy.count(), 1);
@@ -1785,7 +1785,7 @@ void tst_QTreeWidget::setData()
                     item->setStatusTip(j, statusTip);
                     QCOMPARE(itemChangedSpy.count(), 0);
 
-                    QString whatsThis = QString("whatsThis %0").arg(i);
+                    const QString whatsThis = QLatin1String("whatsThis ") + iS;
                     item->setWhatsThis(j, whatsThis);
                     QCOMPARE(item->whatsThis(j), whatsThis);
                     QCOMPARE(itemChangedSpy.count(), 1);
@@ -2147,8 +2147,8 @@ void tst_QTreeWidget::insertItemsWithSorting_data()
         QStringList ascendingItems;
         QStringList reverseItems;
         for (int i = 'a'; i <= 'z'; ++i) {
-            ascendingItems << QString("%0").arg(QLatin1Char(i));
-            reverseItems << QString("%0").arg(QLatin1Char('z' - i + 'a'));
+            ascendingItems << QString(1, QLatin1Char(i));
+            reverseItems << QString(1, QLatin1Char('z' - i + 'a'));
             ascendingRows << i - 'a';
             reverseRows << 'z' - i + 'a';
         }
@@ -2671,9 +2671,9 @@ void tst_QTreeWidget::expandAndCallapse()
     QTreeWidgetItem *top = new QTreeWidgetItem(&tw, QStringList() << "top");
     QTreeWidgetItem *p;
     for (int i = 0; i < 10; ++i) {
-        p = new QTreeWidgetItem(top, QStringList() << QString("%1").arg(i));
+        p = new QTreeWidgetItem(top, QStringList(QString::number(i)));
         for (int j = 0; j < 10; ++j)
-            new QTreeWidgetItem(p, QStringList() << QString("%1").arg(j));
+            new QTreeWidgetItem(p, QStringList(QString::number(j)));
     }
     QSignalSpy spy0(&tw, SIGNAL(itemExpanded(QTreeWidgetItem*)));
     QSignalSpy spy1(&tw, SIGNAL(itemCollapsed(QTreeWidgetItem*)));
@@ -3133,7 +3133,7 @@ void tst_QTreeWidget::selectionOrder()
     testWidget->setColumnCount(1);
     QList<QTreeWidgetItem *> items;
     for (int i = 0; i < 10; ++i)
-        items.append(new QTreeWidgetItem((QTreeWidget*)0, QStringList(QString("item: %1").arg(i))));
+        items.append(new QTreeWidgetItem((QTreeWidget*)0, QStringList(QLatin1String("item: ") + QString::number(i))));
     testWidget->insertTopLevelItems(0, items);
 
     QModelIndex idx = testWidget->indexFromItem(items[0]);
diff --git a/tests/auto/widgets/itemviews/qtreewidgetitemiterator/tst_qtreewidgetitemiterator.cpp b/tests/auto/widgets/itemviews/qtreewidgetitemiterator/tst_qtreewidgetitemiterator.cpp
index c52198fa2c..2ea78f8154 100644
--- a/tests/auto/widgets/itemviews/qtreewidgetitemiterator/tst_qtreewidgetitemiterator.cpp
+++ b/tests/auto/widgets/itemviews/qtreewidgetitemiterator/tst_qtreewidgetitemiterator.cpp
@@ -105,7 +105,8 @@ void tst_QTreeWidgetItemIterator::initTestCase()
      */
     for (int i=0; i <= 16; ++i) {
         QTreeWidgetItem *top = new QTreeWidgetItem(testWidget);
-        top->setText(0, QString("top%1").arg(i));
+        const QString topS = QLatin1String("top") + QString::number(i);
+        top->setText(0, topS);
         switch (i) {
             case 0:  testWidget->setItemHidden(top, true);break;
             case 1:  testWidget->setItemHidden(top, false);break;
@@ -136,7 +137,7 @@ void tst_QTreeWidgetItemIterator::initTestCase()
         }
         for (int j=0; j <= 16; ++j) {
             QTreeWidgetItem *child = new QTreeWidgetItem(top);
-            child->setText(0, QString("top%1,child%2").arg(i).arg(j));
+            child->setText(0, topS + QLatin1String(",child") + QString::number(j));
             switch (j) {
                 case 0:  testWidget->setItemHidden(child, true);break;
                 case 1:  testWidget->setItemHidden(child, false);break;
@@ -1074,6 +1075,24 @@ void tst_QTreeWidgetItemIterator::updateIfModifiedFromWidget_data()
                 << 3 << 3 << 3 << (int)QTreeWidgetItemIterator::All << 1 << 3 << QString("top0,child1") << QString("top0,child1") << 0;
 }
 
+static void populate3Levels(QTreeWidget &tw, int topLevelItems, int childItems, int grandChildItems)
+{
+    for (int i1 = 0; i1 < topLevelItems; ++i1) {
+        QTreeWidgetItem *top = new QTreeWidgetItem(&tw);
+        const QString top1S = QLatin1String("top") + QString::number(i1);
+        top->setText(0, top1S);
+        for (int i2 = 0; i2 < childItems; ++i2) {
+            QTreeWidgetItem *child = new QTreeWidgetItem(top);
+            const QString childS = top1S + QLatin1String(",child") + QString::number(i2);
+            child->setText(0, childS);
+            for (int i3 = 0; i3 < grandChildItems; ++i3) {
+                QTreeWidgetItem *grandChild = new QTreeWidgetItem(child);
+                grandChild->setText(0, childS + QLatin1String(",grandchild") + QString::number(i3));
+            }
+        }
+    }
+}
+
 void tst_QTreeWidgetItemIterator::updateIfModifiedFromWidget()
 {
     QFETCH(int, topLevelItems);
@@ -1089,18 +1108,7 @@ void tst_QTreeWidgetItemIterator::updateIfModifiedFromWidget()
     QTreeWidget tw;
     tw.clear();
     tw.setColumnCount(2);
-    for (int i1=0; i1 < topLevelItems; ++i1) {
-        QTreeWidgetItem *top = new QTreeWidgetItem(&tw);
-        top->setText(0, QString("top%1").arg(i1));
-        for (int i2=0; i2 < childItems; ++i2) {
-            QTreeWidgetItem *child = new QTreeWidgetItem(top);
-            child->setText(0, QString("top%1,child%2").arg(i1).arg(i2));
-            for (int i3=0; i3 < grandChildItems; ++i3) {
-                QTreeWidgetItem *grandChild = new QTreeWidgetItem(child);
-                grandChild->setText(0, QString("top%1,child%2,grandchild%3").arg(i1).arg(i2).arg(i3));
-            }
-        }
-    }
+    populate3Levels(tw, topLevelItems, childItems, grandChildItems);
 
     QTreeWidgetItemIterator it(&tw, QTreeWidgetItemIterator::IteratorFlags(iteratorflags));
     it+=expecteditemindex;
@@ -1161,18 +1169,7 @@ void tst_QTreeWidgetItemIterator::updateIteratorAfterDeletedItem_and_ContinueIte
     QTreeWidget tw;
     tw.clear();
     tw.setColumnCount(2);
-    for (int i1=0; i1 < topLevelItems; ++i1) {
-        QTreeWidgetItem *top = new QTreeWidgetItem(&tw);
-        top->setText(0, QString("top%1").arg(i1));
-        for (int i2=0; i2 < childItems; ++i2) {
-            QTreeWidgetItem *child = new QTreeWidgetItem(top);
-            child->setText(0, QString("top%1,child%2").arg(i1).arg(i2));
-            for (int i3=0; i3 < grandChildItems; ++i3) {
-                QTreeWidgetItem *grandChild = new QTreeWidgetItem(child);
-                grandChild->setText(0, QString("top%1,child%2,grandchild%3").arg(i1).arg(i2).arg(i3));
-            }
-        }
-    }
+    populate3Levels(tw, topLevelItems, childItems, grandChildItems);
 
     QTreeWidgetItemIterator it(&tw, QTreeWidgetItemIterator::All);
     it += iterator_initial_index;
diff --git a/tests/auto/widgets/kernel/qaction/tst_qaction.cpp b/tests/auto/widgets/kernel/qaction/tst_qaction.cpp
index 71b55d71ea..02276e7651 100644
--- a/tests/auto/widgets/kernel/qaction/tst_qaction.cpp
+++ b/tests/auto/widgets/kernel/qaction/tst_qaction.cpp
@@ -334,9 +334,9 @@ void tst_QAction::task200823_tooltip()
     action->setShortcut(shortcut);
 
     // we want a non-standard tooltip that shows the shortcut
-    action->setToolTip(QString("%1 (%2)").arg(action->text()).arg(action->shortcut().toString()));
+    action->setToolTip(action->text() + QLatin1String(" (") + action->shortcut().toString() + QLatin1Char(')'));
 
-    QString ref = QString("foo (%1)").arg(QKeySequence(shortcut).toString());
+    QString ref = QLatin1String("foo (") + QKeySequence(shortcut).toString() + QLatin1Char(')');
     QCOMPARE(action->toolTip(), ref);
 }
 
diff --git a/tests/auto/widgets/kernel/qapplication/tst_qapplication.cpp b/tests/auto/widgets/kernel/qapplication/tst_qapplication.cpp
index 8f8b4313e2..1257a3f420 100644
--- a/tests/auto/widgets/kernel/qapplication/tst_qapplication.cpp
+++ b/tests/auto/widgets/kernel/qapplication/tst_qapplication.cpp
@@ -400,11 +400,12 @@ void tst_QApplication::setFont_data()
                 if (!sizes.size())
                     sizes = fdb.standardSizes();
                 if (sizes.size() > 0) {
-                    QTest::newRow(QString("data%1a").arg(cnt).toLatin1().constData())
+                    const QByteArray cntB = QByteArray::number(cnt);
+                    QTest::newRow(("data" + cntB + "a").constData())
                         << family
                         << sizes.first()
                         << false;
-                    QTest::newRow(QString("data%1b").arg(cnt).toLatin1().constData())
+                    QTest::newRow(("data" + cntB + "b").constData())
                         << family
                         << sizes.first()
                         << true;
diff --git a/tests/auto/widgets/kernel/qformlayout/tst_qformlayout.cpp b/tests/auto/widgets/kernel/qformlayout/tst_qformlayout.cpp
index 6b27b4ffb6..dc3be524f8 100644
--- a/tests/auto/widgets/kernel/qformlayout/tst_qformlayout.cpp
+++ b/tests/auto/widgets/kernel/qformlayout/tst_qformlayout.cpp
@@ -184,7 +184,7 @@ void tst_QFormLayout::getItemPosition()
     QList<QLabel*> labels;
     QList<QLineEdit*> fields;
     for (int i = 0; i < 5; ++i) {
-        labels.append(new QLabel(QString("Label %1").arg(i+1)));
+        labels.append(new QLabel(QLatin1String("Label " ) + QString::number(i + 1)));
         fields.append(new QLineEdit);
         fl->addRow(labels[i], fields[i]);
     }
diff --git a/tests/auto/widgets/kernel/qgridlayout/tst_qgridlayout.cpp b/tests/auto/widgets/kernel/qgridlayout/tst_qgridlayout.cpp
index 1e67c675ef..0ad8e30351 100644
--- a/tests/auto/widgets/kernel/qgridlayout/tst_qgridlayout.cpp
+++ b/tests/auto/widgets/kernel/qgridlayout/tst_qgridlayout.cpp
@@ -538,7 +538,8 @@ public:
     }
 private:
     void init(int numPixels = -1){
-        setText(QString::fromLatin1("(%1,%2)").arg(sh.width()).arg(sh.height()));
+        setText(QLatin1Char('(') + QString::number(sh.width())
+                + QLatin1Char(',') + QString::number(sh.height()) + QLatin1Char(')'));
         setFrameStyle(QFrame::Box | QFrame::Plain);
         setNumberOfPixels(numPixels);
     }
@@ -1432,8 +1433,9 @@ void tst_QGridLayout::layoutSpacing_data()
             w->setLayout(layout);
             int pw = up->sizeHint().width();
             int ph = up->sizeHint().height();
-            QByteArray testName = QString::fromLatin1("arrowpad with %1 empty rows, %2 empty columns").arg(yoff).arg(xoff).toLatin1();
-            QTest::newRow(testName.data())
+            QByteArray testName = "arrowpad with " + QByteArray::number(yoff)
+                + " empty rows, " + QByteArray::number(xoff) + " empty columns";
+            QTest::newRow(testName.constData())
                     << w << (PointList()
                     << QPoint(0 + pw + 5, 3)
                     << QPoint(0, 3 + ph + 10)
@@ -1686,7 +1688,7 @@ void tst_QGridLayout::replaceWidget()
     for (int n = 0; n < itemCount; ++n) {
         int x = n % 3;
         int y = n / 3;
-        labels[n] = new QLabel(QString("label %1").arg(n));
+        labels[n] = new QLabel(QLatin1String("label ") + QString::number(n));
         Qt::Alignment align = (n % 3 ? Qt::AlignLeft : Qt::AlignRight);
         l->addWidget(labels[n], x * 3, y * 3, (n % 2) + 1, (n + 1) % 2 + 1, align);
     }
diff --git a/tests/auto/widgets/kernel/qshortcut/tst_qshortcut.cpp b/tests/auto/widgets/kernel/qshortcut/tst_qshortcut.cpp
index f206a5fe9a..5641e60078 100644
--- a/tests/auto/widgets/kernel/qshortcut/tst_qshortcut.cpp
+++ b/tests/auto/widgets/kernel/qshortcut/tst_qshortcut.cpp
@@ -180,12 +180,13 @@ protected:
             QKeyEvent *ke = static_cast<QKeyEvent*>(e);
             if (ke->modifiers() && ke->key() > Qt::Key_Any
                 && ke->key() < Qt::Key_ydiaeresis) {
+                const QChar c = QLatin1Char(char(ke->key()));
                 if (ke->modifiers() == Qt::ControlModifier)
-                    insertPlainText(QString("<Ctrl+%1>").arg(char(ke->key())));
+                    insertPlainText(QLatin1String("<Ctrl+") + c + QLatin1Char('>'));
                 else if (ke->modifiers() == Qt::AltModifier)
-                    insertPlainText(QString("<Alt+%1>").arg(char(ke->key())));
+                    insertPlainText(QLatin1String("<Alt+") + c + QLatin1Char('>'));
                 else if (ke->modifiers() == Qt::ShiftModifier)
-                    insertPlainText(QString("<Shift+%1>").arg(char(ke->key())));
+                    insertPlainText(QLatin1String("<Shift+") + c + QLatin1Char('>'));
                 return true;
             }
         }
diff --git a/tests/auto/widgets/kernel/qwidget/tst_qwidget.cpp b/tests/auto/widgets/kernel/qwidget/tst_qwidget.cpp
index f3f4467b80..eb39f8fff8 100644
--- a/tests/auto/widgets/kernel/qwidget/tst_qwidget.cpp
+++ b/tests/auto/widgets/kernel/qwidget/tst_qwidget.cpp
@@ -5644,7 +5644,7 @@ void tst_QWidget::setToolTip()
     for (int pass = 0; pass < 2; ++pass) {
         QCursor::setPos(0, 0);
         QScopedPointer<QWidget> popup(new QWidget(0, Qt::Popup));
-        popup->setObjectName(QString::fromLatin1("tst_qwidget setToolTip #%1").arg(pass));
+        popup->setObjectName(QLatin1String("tst_qwidget setToolTip #") + QString::number(pass));
         popup->setWindowTitle(popup->objectName());
         popup->setGeometry(50, 50, 150, 50);
         QFrame *frame = new QFrame(popup.data());
diff --git a/tests/auto/widgets/styles/qstylesheetstyle/tst_qstylesheetstyle.cpp b/tests/auto/widgets/styles/qstylesheetstyle/tst_qstylesheetstyle.cpp
index b52aa30239..5372714b6b 100644
--- a/tests/auto/widgets/styles/qstylesheetstyle/tst_qstylesheetstyle.cpp
+++ b/tests/auto/widgets/styles/qstylesheetstyle/tst_qstylesheetstyle.cpp
@@ -1814,8 +1814,11 @@ void tst_QStyleSheetStyle::QTBUG36933_brokenPseudoClassLookup()
     QTableWidget widget(rowCount, columnCount);
 
     for (int row = 0; row < rowCount; ++row) {
-        for (int column = 0; column < columnCount; ++column)
-            widget.setItem(row, column, new QTableWidgetItem(QStringLiteral("row %1 column %2").arg(row + 1).arg(column + 1)));
+        for (int column = 0; column < columnCount; ++column) {
+            const QString t = QLatin1String("row ") + QString::number(row + 1)
+                + QLatin1String(" column ") + QString::number(column + 1);
+            widget.setItem(row, column, new QTableWidgetItem(t));
+        }
 
         // put no visible text for the vertical headers, but still put some text or they will collapse
         widget.setVerticalHeaderItem(row, new QTableWidgetItem(QStringLiteral("    ")));
diff --git a/tests/auto/widgets/util/qcompleter/tst_qcompleter.cpp b/tests/auto/widgets/util/qcompleter/tst_qcompleter.cpp
index e8369ef9bd..fdeb6d100d 100644
--- a/tests/auto/widgets/util/qcompleter/tst_qcompleter.cpp
+++ b/tests/auto/widgets/util/qcompleter/tst_qcompleter.cpp
@@ -367,7 +367,7 @@ void tst_QCompleter::csMatchingOnCsSortedModel_data()
     QTest::addColumn<QString>("completion");
     QTest::addColumn<QString>("completionText");
 
-#define ROWNAME(name) (qPrintable(QString("%1 %2").arg(name).arg(i)))
+#define ROWNAME(name) ((QByteArray(name) + ' ' + QByteArray::number(i)).constData())
 
     for (int i = 0; i < 2; i++) {
          if (i == 1)
@@ -1164,7 +1164,7 @@ void tst_QCompleter::dynamicSortOrder()
     completer.setModelSorting(QCompleter::CaseSensitivelySortedModel);
     QStandardItem *root = model.invisibleRootItem();
     for (int i = 0; i < 20; i++) {
-        root->appendRow(new QStandardItem(QString("%1").arg(i)));
+        root->appendRow(new QStandardItem(QString::number(i)));
     }
     root->appendRow(new QStandardItem("13"));
     root->sortChildren(0, Qt::AscendingOrder);
@@ -1256,7 +1256,7 @@ void tst_QCompleter::task189564_omitNonSelectableItems()
 
     QStringList strings;
     for (int i = 0; i < n; ++i)
-        strings << QString("%1%2").arg(prefix).arg(i);
+        strings << prefix + QString::number(i);
     const QString omitString(strings.at(n / 2));
     task189564_StringListModel model(omitString);
     model.setStringList(strings);
@@ -1553,9 +1553,9 @@ void tst_QCompleter::task247560_keyboardNavigation()
     QStandardItemModel model;
 
     for (int i = 0; i < 5; i++) {
-        for (int j = 0; j < 5; j++) {
-            model.setItem(i, j, new QStandardItem(QString("row %1 column %2").arg(i).arg(j)));
-        }
+        const QString prefix = QLatin1String("row ") + QString::number(i) + QLatin1String(" column ");
+        for (int j = 0; j < 5; j++)
+            model.setItem(i, j, new QStandardItem(prefix + QString::number(j)));
     }
 
 
diff --git a/tests/auto/widgets/widgets/qcombobox/tst_qcombobox.cpp b/tests/auto/widgets/widgets/qcombobox/tst_qcombobox.cpp
index 86407e2acc..eb8b610352 100644
--- a/tests/auto/widgets/widgets/qcombobox/tst_qcombobox.cpp
+++ b/tests/auto/widgets/widgets/qcombobox/tst_qcombobox.cpp
@@ -2308,9 +2308,10 @@ void tst_QComboBox::task191329_size()
 
     QStandardItemModel model(rows, 2);
     for (int row = 0; row < model.rowCount(); ++row) {
+        const QString rowS = QLatin1String("row ") + QString::number(row);
         for (int column = 0; column < model.columnCount(); ++column) {
-            QStandardItem *item = new QStandardItem(QString("row %0, column %1").arg(row).arg(column));
-            model.setItem(row, column, item);
+            const QString text = rowS + QLatin1String(", column ") + QString::number(column);
+            model.setItem(row, column, new QStandardItem(text));
         }
     }
     QTableView *table = new QTableView();
@@ -2860,10 +2861,11 @@ void tst_QComboBox::task_QTBUG_10491_currentIndexAndModelColumn()
 
     QStandardItemModel model(4, 4, &comboBox);
     for (int i = 0; i < 4; i++){
-        model.setItem(i, 0, new QStandardItem(QString("Employee Nr %1").arg(i)));
-        model.setItem(i, 1, new QStandardItem(QString("Street Nr %1").arg(i)));
-        model.setItem(i, 2, new QStandardItem(QString("Town Nr %1").arg(i)));
-        model.setItem(i, 3, new QStandardItem(QString("Phone Nr %1").arg(i)));
+        const QString iS = QString::number(i);
+        model.setItem(i, 0, new QStandardItem(QLatin1String("Employee Nr ") + iS));
+        model.setItem(i, 1, new QStandardItem(QLatin1String("Street Nr ") + iS));
+        model.setItem(i, 2, new QStandardItem(QLatin1String("Town Nr ") + iS));
+        model.setItem(i, 3, new QStandardItem(QLatin1String("Phone Nr ") + iS));
     }
     comboBox.setModel(&model);
     comboBox.setModelColumn(0);
@@ -2909,12 +2911,12 @@ void tst_QComboBox::itemData()
     // ensure that the currentText(), the DisplayRole and the EditRole
     // stay in sync when using QComboBox's default model
     for (int i = 0; i < itemCount; ++i) {
-        QString itemText = QString("item text %1").arg(i);
+        QString itemText = QLatin1String("item text ") + QString::number(i);
         comboBox.addItem(itemText);
     }
 
     for (int i = 0; i < itemCount; ++i) {
-        QString itemText = QString("item text %1").arg(i);
+        QString itemText = QLatin1String("item text ") + QString::number(i);
         QCOMPARE(comboBox.itemText(i), itemText);
         QCOMPARE(comboBox.itemData(i, Qt::DisplayRole).toString(), itemText);
         QCOMPARE(comboBox.itemData(i, Qt::EditRole).toString(), itemText);
@@ -2926,14 +2928,11 @@ void tst_QComboBox::itemData()
         QCOMPARE(comboBox.currentData(Qt::EditRole).toString(), itemText);
     }
 
-    for (int i = 0; i < itemCount; ++i) {
-        // now change by using setItemText
-        QString itemText = QString("setItemText %1").arg(i);
-        comboBox.setItemText(i, itemText);
-    }
+    for (int i = 0; i < itemCount; ++i) // now change by using setItemText
+        comboBox.setItemText(i, QLatin1String("setItemText ") + QString::number(i));
 
     for (int i = 0; i < itemCount; ++i) {
-        QString itemText = QString("setItemText %1").arg(i);
+        QString itemText = QLatin1String("setItemText ") + QString::number(i);
         QCOMPARE(comboBox.itemText(i), itemText);
         QCOMPARE(comboBox.itemData(i, Qt::DisplayRole).toString(), itemText);
         QCOMPARE(comboBox.itemData(i, Qt::EditRole).toString(), itemText);
@@ -2947,12 +2946,12 @@ void tst_QComboBox::itemData()
 
     for (int i = 0; i < itemCount; ++i) {
         // now change by changing the DisplayRole's data
-        QString itemText = QString("setItemData(DisplayRole) %1").arg(i);
+        QString itemText = QLatin1String("setItemData(DisplayRole) ") + QString::number(i);
         comboBox.setItemData(i, QVariant(itemText), Qt::DisplayRole);
     }
 
     for (int i = 0; i < itemCount; ++i) {
-        QString itemText = QString("setItemData(DisplayRole) %1").arg(i);
+        QString itemText = QLatin1String("setItemData(DisplayRole) ") + QString::number(i);
         QCOMPARE(comboBox.itemText(i), itemText);
         QCOMPARE(comboBox.itemData(i, Qt::DisplayRole).toString(), itemText);
         QCOMPARE(comboBox.itemData(i, Qt::EditRole).toString(), itemText);
@@ -2966,12 +2965,12 @@ void tst_QComboBox::itemData()
 
     for (int i = 0; i < itemCount; ++i) {
         // now change by changing the EditRole's data
-        QString itemText = QString("setItemData(EditRole) %1").arg(i);
+        QString itemText = QLatin1String("setItemData(EditRole) ") + QString::number(i);
         comboBox.setItemData(i, QVariant(itemText), Qt::EditRole);
     }
 
     for (int i = 0; i < itemCount; ++i) {
-        QString itemText = QString("setItemData(EditRole) %1").arg(i);
+        QString itemText = QLatin1String("setItemData(EditRole) ") + QString::number(i);
         QCOMPARE(comboBox.itemText(i), itemText);
         QCOMPARE(comboBox.itemData(i, Qt::DisplayRole).toString(), itemText);
         QCOMPARE(comboBox.itemData(i, Qt::EditRole).toString(), itemText);
@@ -2988,14 +2987,14 @@ void tst_QComboBox::itemData()
 
     // set additional user data in the addItem call
     for (int i = 0; i < itemCount; ++i) {
-        QString itemText = QString("item text %1").arg(i);
-        QString itemDataText = QString("item data %1").arg(i);
-        comboBox.addItem(itemText, QVariant(itemDataText));
+        const QString iS = QString::number(i);
+        comboBox.addItem(QLatin1String("item text ") + iS, QVariant(QLatin1String("item data ") + iS));
     }
 
     for (int i = 0; i < itemCount; ++i) {
-        QString itemText = QString("item text %1").arg(i);
-        QString itemDataText = QString("item data %1").arg(i);
+        const QString iS = QString::number(i);
+        QString itemText = QLatin1String("item text ") + iS;
+        QString itemDataText = QLatin1String("item data ") + iS;
         QCOMPARE(comboBox.itemData(i, Qt::DisplayRole).toString(), itemText);
         QCOMPARE(comboBox.itemData(i, Qt::EditRole).toString(), itemText);
         QCOMPARE(comboBox.itemData(i).toString(), itemDataText);
@@ -3018,8 +3017,9 @@ void tst_QComboBox::itemData()
     QString qtlogoPath = QFINDTESTDATA("qtlogo.png");
     QIcon icon = QIcon(QPixmap(qtlogoPath));
     for (int i = 0; i < itemCount; ++i) {
-        QString itemText = QString("item text %1").arg(i);
-        QString itemDataText = QString("item data %1").arg(i);
+        const QString iS = QString::number(i);
+        QString itemText = QLatin1String("item text ") + iS;
+        QString itemDataText = QLatin1String("item data ") + iS;
         double d = i;
         comboBox.addItem(itemText);
         comboBox.setItemData(i, QVariant(itemDataText), Qt::UserRole);
@@ -3028,8 +3028,9 @@ void tst_QComboBox::itemData()
     }
 
     for (int i = 0; i < itemCount; ++i) {
-        QString itemText = QString("item text %1").arg(i);
-        QString itemDataText = QString("item data %1").arg(i);
+        const QString iS = QString::number(i);
+        QString itemText = QLatin1String("item text ") + iS;
+        QString itemDataText = QLatin1String("item data ") + iS;
         double d = i;
         QCOMPARE(comboBox.itemData(i, Qt::DisplayRole).toString(), itemText);
         QCOMPARE(comboBox.itemData(i, Qt::EditRole).toString(), itemText);
diff --git a/tests/auto/widgets/widgets/qfontcombobox/tst_qfontcombobox.cpp b/tests/auto/widgets/widgets/qfontcombobox/tst_qfontcombobox.cpp
index 5d6fdf2851..09de0e6dc9 100644
--- a/tests/auto/widgets/widgets/qfontcombobox/tst_qfontcombobox.cpp
+++ b/tests/auto/widgets/widgets/qfontcombobox/tst_qfontcombobox.cpp
@@ -248,7 +248,7 @@ void tst_QFontComboBox::writingSystem_data()
     QTest::newRow("Runic") << QFontDatabase::Runic;
 
     for (int i = 0; i < 31; ++i)
-        QTest::newRow(qPrintable(QString("enum %1").arg(i))) << (QFontDatabase::WritingSystem)i;
+        QTest::newRow(("enum " + QByteArray::number(i)).constData()) << (QFontDatabase::WritingSystem)i;
 }
 
 // public QFontDatabase::WritingSystem writingSystem() const
diff --git a/tests/auto/widgets/widgets/qframe/tst_qframe.cpp b/tests/auto/widgets/widgets/qframe/tst_qframe.cpp
index 81a6ba2ee3..03bd79683f 100644
--- a/tests/auto/widgets/widgets/qframe/tst_qframe.cpp
+++ b/tests/auto/widgets/widgets/qframe/tst_qframe.cpp
@@ -73,22 +73,24 @@ static void provideFrameData()
 
     for (int lineWidth = 0; lineWidth < 3; ++lineWidth) {
         for (int midLineWidth = 0; midLineWidth < 3; ++midLineWidth) {
-            QTest::newRow(qPrintable(QStringLiteral("box_noshadow_%1_%2").arg(lineWidth).arg(midLineWidth)))
-                    << "box_noshadow" << lineWidth << midLineWidth << QFrame::Box << (QFrame::Shadow)0;
-            QTest::newRow(qPrintable(QStringLiteral("box_plain_%1_%2").arg(lineWidth).arg(midLineWidth)))
+            const QByteArray postFix = '_' + QByteArray::number(lineWidth) + '_'
+                + QByteArray::number(midLineWidth);
+            QTest::newRow(("box_noshadow" + postFix).constData())
+                     << "box_noshadow" << lineWidth << midLineWidth << QFrame::Box << (QFrame::Shadow)0;
+            QTest::newRow(("box_plain" + postFix).constData())
                     << "box_plain" << lineWidth << midLineWidth << QFrame::Box << QFrame::Plain;
-            QTest::newRow(qPrintable(QStringLiteral("box_raised_%1_%2").arg(lineWidth).arg(midLineWidth)))
+            QTest::newRow(("box_raised" + postFix).constData())
                     << "box_raised" << lineWidth << midLineWidth << QFrame::Box << QFrame::Raised;
-            QTest::newRow(qPrintable(QStringLiteral("box_sunken_%1_%2").arg(lineWidth).arg(midLineWidth)))
+            QTest::newRow(("box_sunken" + postFix).constData())
                     << "box_sunken" << lineWidth << midLineWidth << QFrame::Box << QFrame::Sunken;
 
-            QTest::newRow(qPrintable(QStringLiteral("winpanel_noshadow_%1_%2").arg(lineWidth).arg(midLineWidth)))
+            QTest::newRow(("winpanel_noshadow" + postFix).constData())
                     << "winpanel_noshadow" << lineWidth << midLineWidth << QFrame::WinPanel << (QFrame::Shadow)0;
-            QTest::newRow(qPrintable(QStringLiteral("winpanel_plain_%1_%2").arg(lineWidth).arg(midLineWidth)))
+            QTest::newRow(("winpanel_plain" + postFix).constData())
                     << "winpanel_plain" << lineWidth << midLineWidth << QFrame::WinPanel << QFrame::Plain;
-            QTest::newRow(qPrintable(QStringLiteral("winpanel_raised_%1_%2").arg(lineWidth).arg(midLineWidth)))
+            QTest::newRow(("winpanel_raised" + postFix).constData())
                     << "winpanel_raised" << lineWidth << midLineWidth << QFrame::WinPanel << QFrame::Raised;
-            QTest::newRow(qPrintable(QStringLiteral("winpanel_sunken_%1_%2").arg(lineWidth).arg(midLineWidth)))
+            QTest::newRow(("winpanel_sunken" + postFix).constData())
                     << "winpanel_sunken" << lineWidth << midLineWidth << QFrame::WinPanel << QFrame::Sunken;
         }
     }
@@ -174,7 +176,10 @@ void tst_QFrame::testPainting()
 
     const QPixmap pixmap = frame.grab();
 
-    const QString referenceFilePath = QFINDTESTDATA(QStringLiteral("images/%1_%2_%3.png").arg(basename).arg(lineWidth).arg(midLineWidth));
+    const QString fileName = QLatin1String("images/") + basename + QLatin1Char('_')
+        + QString::number(lineWidth) + QLatin1Char('_') + QString::number(midLineWidth)
+        + QLatin1String(".png");
+    const QString referenceFilePath = QFINDTESTDATA(fileName);
     const QPixmap referencePixmap(referenceFilePath);
     QVERIFY2(!referencePixmap.isNull(), qPrintable(QStringLiteral("Could not load reference pixmap %1").arg(referenceFilePath)));
     QCOMPARE(pixmap, referencePixmap);
diff --git a/tests/auto/widgets/widgets/qlineedit/tst_qlineedit.cpp b/tests/auto/widgets/widgets/qlineedit/tst_qlineedit.cpp
index 396dad4fa5..f936670d9e 100644
--- a/tests/auto/widgets/widgets/qlineedit/tst_qlineedit.cpp
+++ b/tests/auto/widgets/widgets/qlineedit/tst_qlineedit.cpp
@@ -2866,6 +2866,11 @@ void tst_QLineEdit::insert()
     QCOMPARE(testWidget->text(), QString("No Crash! This is a nice test"));
 }
 
+static inline QByteArray selectionTestName(int start, int length)
+{
+    return "selection start: " + QByteArray::number(start) + " length: " + QByteArray::number(length);
+}
+
 void tst_QLineEdit::setSelection_data()
 {
     QTest::addColumn<QString>("text");
@@ -2879,39 +2884,39 @@ void tst_QLineEdit::setSelection_data()
     int start, length, pos;
 
     start = 0; length = 1; pos = 1;
-    QTest::newRow(QString("selection start: %1 length: %2").arg(start).arg(length).toLatin1())
+    QTest::newRow(selectionTestName(start, length).constData())
         << text << start << length << pos << QString("A") << true;
 
     start = 0; length = 2; pos = 2;
-    QTest::newRow(QString("selection start: %1 length: %2").arg(start).arg(length).toLatin1())
+    QTest::newRow(selectionTestName(start, length).constData())
         << text << start << length << pos << QString("Ab") << true;
 
     start = 0; length = 4; pos = 4;
-    QTest::newRow(QString("selection start: %1 length: %2").arg(start).arg(length).toLatin1())
+    QTest::newRow(selectionTestName(start, length).constData())
         << text << start << length << pos << QString("Abc ") << true;
 
     start = -1; length = 0; pos = text.length();
-    QTest::newRow(QString("selection start: %1 length: %2").arg(start).arg(length).toLatin1())
+    QTest::newRow(selectionTestName(start, length).constData())
         << text << start << length << pos << QString() << false;
 
     start = 34; length = 1; pos = 35;
-    QTest::newRow(QString("selection start: %1 length: %2").arg(start).arg(length).toLatin1())
+    QTest::newRow(selectionTestName(start, length).constData())
         << text << start << length << pos << QString("z") << true;
 
     start = 34; length = 2; pos = 35;
-    QTest::newRow(QString("selection start: %1 length: %2").arg(start).arg(length).toLatin1())
+    QTest::newRow(selectionTestName(start, length).constData())
         << text << start << length << pos << QString("z") << true;
 
     start = 34; length = -1; pos = 33;
-    QTest::newRow(QString("selection start: %1 length: %2").arg(start).arg(length).toLatin1())
+    QTest::newRow(selectionTestName(start, length).constData())
         << text << start << length << pos << QString("y") << true;
 
     start = 1; length = -2; pos = 0;
-    QTest::newRow(QString("selection start: %1 length: %2").arg(start).arg(length).toLatin1())
+    QTest::newRow(selectionTestName(start, length).constData())
         << text << start << length << pos << QString("A") << true;
 
     start = -1; length = -1; pos = text.length();
-    QTest::newRow(QString("selection start: %1 length: %2").arg(start).arg(length).toLatin1())
+    QTest::newRow(selectionTestName(start, length).constData())
         << text << start << length << pos << QString() << false;
 }
 
@@ -3292,7 +3297,7 @@ void tst_QLineEdit::inlineCompletion()
     QStandardItem *root = model->invisibleRootItem();
     QStandardItem *items[5];
     for (int i = 0; i < 5; i++) {
-        items[i] = new QStandardItem(QString("item%1").arg(i));
+        items[i] = new QStandardItem(QLatin1String("item") + QString::number(i));
         if ((i+2)%2 == 0) { // disable 0,2,4
             items[i]->setFlags(items[i]->flags() & ~Qt::ItemIsEnabled);
         }
diff --git a/tests/auto/widgets/widgets/qmainwindow/tst_qmainwindow.cpp b/tests/auto/widgets/widgets/qmainwindow/tst_qmainwindow.cpp
index 6282028746..ebf05ca300 100644
--- a/tests/auto/widgets/widgets/qmainwindow/tst_qmainwindow.cpp
+++ b/tests/auto/widgets/widgets/qmainwindow/tst_qmainwindow.cpp
@@ -1369,7 +1369,7 @@ void tst_QMainWindow::restoreStateFromPreviousVersion()
         QVector<QDockWidget*> docks;
 
         for(int i = 0; i < 16; ++i) {
-            const QString name = QString::fromLatin1("dock %1").arg(i);
+            const QString name = QStringLiteral("dock ") + QString::number(i);
             QDockWidget *dock = new QDockWidget(name);
             docks += dock;
             dock->setObjectName(name);
diff --git a/tests/auto/widgets/widgets/qmdiarea/tst_qmdiarea.cpp b/tests/auto/widgets/widgets/qmdiarea/tst_qmdiarea.cpp
index e23634c515..83a4e3bb59 100644
--- a/tests/auto/widgets/widgets/qmdiarea/tst_qmdiarea.cpp
+++ b/tests/auto/widgets/widgets/qmdiarea/tst_qmdiarea.cpp
@@ -621,6 +621,11 @@ void tst_QMdiArea::showWindows()
 
 //#define USE_SHOW
 
+static inline QString windowTitle(const QString &t, const QString &f)
+{
+    return t + QLatin1String(" - [") + f + QLatin1Char(']');
+}
+
 void tst_QMdiArea::changeWindowTitle()
 {
     const QString mwc = QString::fromLatin1("MainWindow's Caption");
@@ -648,7 +653,7 @@ void tst_QMdiArea::changeWindowTitle()
     widget->setWindowState(Qt::WindowMaximized);
 #endif
 #if !defined(Q_OS_MAC) && !defined(Q_OS_WINCE)
-    QTRY_COMPARE( mw->windowTitle(), QString::fromLatin1("%1 - [%2]").arg(mwc).arg(wc) );
+    QTRY_COMPARE( mw->windowTitle(), windowTitle(mwc, wc) );
 #endif
 
     mw->hide();
@@ -657,7 +662,7 @@ void tst_QMdiArea::changeWindowTitle()
     QVERIFY(QTest::qWaitForWindowExposed(mw));
 
 #if !defined(Q_OS_MAC) && !defined(Q_OS_WINCE)
-    QTRY_COMPARE( mw->windowTitle(), QString::fromLatin1("%1 - [%2]").arg(mwc).arg(wc) );
+    QTRY_COMPARE( mw->windowTitle(), windowTitle(mwc, wc) );
 #endif
 
 #ifdef USE_SHOW
@@ -675,11 +680,11 @@ void tst_QMdiArea::changeWindowTitle()
 #endif
     qApp->processEvents();
 #if !defined(Q_OS_MAC) && !defined(Q_OS_WINCE)
-    QTRY_COMPARE( mw->windowTitle(), QString::fromLatin1("%1 - [%2]").arg(mwc).arg(wc) );
+    QTRY_COMPARE( mw->windowTitle(), windowTitle(mwc, wc) );
     widget->setWindowTitle( wc2 );
-    QCOMPARE( mw->windowTitle(), QString::fromLatin1("%1 - [%2]").arg(mwc).arg(wc2) );
+    QCOMPARE( mw->windowTitle(), windowTitle(mwc, wc2) );
     mw->setWindowTitle( mwc2 );
-    QCOMPARE( mw->windowTitle(), QString::fromLatin1("%1 - [%2]").arg(mwc2).arg(wc2) );
+    QCOMPARE( mw->windowTitle(), windowTitle(mwc2, wc2) );
 #endif
 
     mw->show();
@@ -693,7 +698,7 @@ void tst_QMdiArea::changeWindowTitle()
 
     qApp->processEvents();
 #if !defined(Q_OS_MAC) && !defined(Q_OS_WINCE)
-    QCOMPARE( mw->windowTitle(), QString::fromLatin1("%1 - [%2]").arg(mwc2).arg(wc2) );
+    QCOMPARE( mw->windowTitle(), windowTitle(mwc2, wc2) );
 #endif
 #ifdef USE_SHOW
     widget->showNormal();
@@ -714,7 +719,7 @@ void tst_QMdiArea::changeWindowTitle()
 #endif
     qApp->processEvents();
 #if !defined(Q_OS_MAC) && !defined(Q_OS_WINCE)
-    QCOMPARE( mw->windowTitle(), QString::fromLatin1("%1 - [%2]").arg(mwc2).arg(wc2) );
+    QCOMPARE( mw->windowTitle(), windowTitle(mwc2, wc2) );
 #endif
 
 #ifdef USE_SHOW
@@ -2321,7 +2326,7 @@ void tst_QMdiArea::setViewMode()
     iconPixmap.fill(Qt::red);
     for (int i = 0; i < 5; ++i) {
         QMdiSubWindow *subWindow = mdiArea.addSubWindow(new QWidget);
-        subWindow->setWindowTitle(QString(QLatin1String("Title %1")).arg(i));
+        subWindow->setWindowTitle(QLatin1String("Title ") + QString::number(i));
         subWindow->setWindowIcon(iconPixmap);
     }
 
diff --git a/tests/auto/widgets/widgets/qmdisubwindow/tst_qmdisubwindow.cpp b/tests/auto/widgets/widgets/qmdisubwindow/tst_qmdisubwindow.cpp
index acdf5b00e2..4e0cc9edf1 100644
--- a/tests/auto/widgets/widgets/qmdisubwindow/tst_qmdisubwindow.cpp
+++ b/tests/auto/widgets/widgets/qmdisubwindow/tst_qmdisubwindow.cpp
@@ -396,7 +396,7 @@ void tst_QMdiSubWindow::mainWindowSupport()
 
         QMdiArea *nestedWorkspace = new QMdiArea; // :-)
         window->setWidget(nestedWorkspace);
-        window->widget()->setWindowTitle(QString::fromLatin1("Window %1").arg(i));
+        window->widget()->setWindowTitle(QLatin1String("Window ") + QString::number(i));
 
         workspace->addSubWindow(window);
         QVERIFY(!window->maximizedButtonsWidget());
@@ -423,8 +423,9 @@ void tst_QMdiSubWindow::mainWindowSupport()
         QVERIFY(window->maximizedSystemMenuIconWidget());
         QCOMPARE(window->maximizedSystemMenuIconWidget(), qobject_cast<QWidget *>(mainWindow.menuBar()
                                                                     ->cornerWidget(Qt::TopLeftCorner)));
-        QCOMPARE(mainWindow.windowTitle(), QString::fromLatin1("%1 - [%2]")
-                                           .arg(originalWindowTitle, window->widget()->windowTitle()));
+        const QString expectedTitle = originalWindowTitle + QLatin1String(" - [")
+            + window->widget()->windowTitle() + QLatin1Char(']');
+        QCOMPARE(mainWindow.windowTitle(), expectedTitle);
 #endif
 
         // Check that nested child windows don't set window title
@@ -432,7 +433,7 @@ void tst_QMdiSubWindow::mainWindowSupport()
         QMdiSubWindow *nestedWindow = new QMdiSubWindow;
         nestedWindow->setWidget(new QWidget);
         nestedWorkspace->addSubWindow(nestedWindow);
-        nestedWindow->widget()->setWindowTitle(QString::fromLatin1("NestedWindow %1").arg(i));
+        nestedWindow->widget()->setWindowTitle(QLatin1String("NestedWindow ") + QString::number(i));
         nestedWindow->showMaximized();
         qApp->processEvents();
         QVERIFY(nestedWindow->isMaximized());
diff --git a/tests/auto/widgets/widgets/qmenu/tst_qmenu.cpp b/tests/auto/widgets/widgets/qmenu/tst_qmenu.cpp
index 5ae0733965..eaa277093c 100644
--- a/tests/auto/widgets/widgets/qmenu/tst_qmenu.cpp
+++ b/tests/auto/widgets/widgets/qmenu/tst_qmenu.cpp
@@ -554,7 +554,7 @@ void tst_QMenu::widgetActionFocus()
     QMenu m;
     QListWidget *l = new QListWidget(&m);
     for (int i = 1; i<3 ; i++)
-        l->addItem(QString("item%1").arg(i));
+        l->addItem(QStringLiteral("item" ) + QString::number(i));
     QWidgetAction *wa = new QWidgetAction(&m);
     wa->setDefaultWidget(l);
     m.addAction(wa);
@@ -747,7 +747,7 @@ void tst_QMenu::task250673_activeMultiColumnSubMenuPosition()
 
     uint i = 2;
     while (main.columnCount() < 2) {
-        main.addAction(QString("Item %1").arg(i));
+        main.addAction(QLatin1String("Item ") + QString::number(i));
         ++i;
         QVERIFY(i<1000);
     }
@@ -1021,7 +1021,7 @@ public:
     MyMenu() : m_currentIndex(0)
     {
         for (int i = 0; i < 2; ++i)
-            dialogActions[i] = addAction( QString("dialog %1").arg(i), dialogs + i, SLOT(exec()));
+            dialogActions[i] = addAction(QLatin1String("dialog ") + QString::number(i), dialogs + i, SLOT(exec()));
     }
 
     void activateAction(int index)
diff --git a/tests/auto/widgets/widgets/qsplitter/tst_qsplitter.cpp b/tests/auto/widgets/widgets/qsplitter/tst_qsplitter.cpp
index a54ad6ecd0..9e854ff3ea 100644
--- a/tests/auto/widgets/widgets/qsplitter/tst_qsplitter.cpp
+++ b/tests/auto/widgets/widgets/qsplitter/tst_qsplitter.cpp
@@ -678,9 +678,9 @@ void tst_QSplitter::task187373_addAbstractScrollAreas_data()
     classNames << QLatin1String("QTreeView");
 
     foreach (QString className, classNames) {
-        QTest::newRow(qPrintable(QString("%1 1").arg(className))) << className << false << true;
-        QTest::newRow(qPrintable(QString("%1 2").arg(className))) << className << true << false;
-        QTest::newRow(qPrintable(QString("%1 3").arg(className))) << className << true << true;
+        QTest::newRow(qPrintable(className + QLatin1String(" 1"))) << className << false << true;
+        QTest::newRow(qPrintable(className + QLatin1String(" 2"))) << className << true << false;
+        QTest::newRow(qPrintable(className + QLatin1String(" 3"))) << className << true << true;
     }
 }
 
diff --git a/tests/auto/widgets/widgets/qstackedwidget/tst_qstackedwidget.cpp b/tests/auto/widgets/widgets/qstackedwidget/tst_qstackedwidget.cpp
index d060c4ceae..2a2bc1edf8 100644
--- a/tests/auto/widgets/widgets/qstackedwidget/tst_qstackedwidget.cpp
+++ b/tests/auto/widgets/widgets/qstackedwidget/tst_qstackedwidget.cpp
@@ -149,7 +149,7 @@ private:
     void createWidgets() {
         for (int i = 0; i < m_n; ++i) {
             QLineEdit *le = new QLineEdit(this);
-            le->setObjectName(QString::fromLatin1("lineEdit%1").arg(i));
+            le->setObjectName(QLatin1String("lineEdit") + QString::number(i));
             layout ()->addWidget(le);
             m_les << le;
         }
diff --git a/tests/auto/widgets/widgets/qtabbar/tst_qtabbar.cpp b/tests/auto/widgets/widgets/qtabbar/tst_qtabbar.cpp
index ced2253a74..b983e6954a 100644
--- a/tests/auto/widgets/widgets/qtabbar/tst_qtabbar.cpp
+++ b/tests/auto/widgets/widgets/qtabbar/tst_qtabbar.cpp
@@ -606,7 +606,7 @@ public slots:
     void updateTabText()
     {
         count++;
-        setTabText(0, QString("%1").arg(count));
+        setTabText(0, QString::number(count));
     }
 };