diff --git a/tests/benchmarks/corelib/tools/qdatetime/main.cpp b/tests/benchmarks/corelib/tools/qdatetime/main.cpp
index 1eb423c8e7..34815af646 100644
--- a/tests/benchmarks/corelib/tools/qdatetime/main.cpp
+++ b/tests/benchmarks/corelib/tools/qdatetime/main.cpp
@@ -48,7 +48,11 @@ class tst_QDateTime : public QObject
 {
     Q_OBJECT
 
-    enum {
+    enum
+#if defined(Q_COMPILER_CLASS_ENUM) || (defined(Q_CC_MSVC) && _MSC_VER >= 1700)
+        : qint64
+#endif
+    {
         SECS_PER_DAY = 86400,
         MSECS_PER_DAY = 86400000,
         JULIAN_DAY_1950 = 2433283,
diff --git a/tests/benchmarks/gui/painting/qpainter/tst_qpainter.cpp b/tests/benchmarks/gui/painting/qpainter/tst_qpainter.cpp
index 4b2781e9ea..a6f144ea8a 100644
--- a/tests/benchmarks/gui/painting/qpainter/tst_qpainter.cpp
+++ b/tests/benchmarks/gui/painting/qpainter/tst_qpainter.cpp
@@ -1290,7 +1290,7 @@ void tst_QPainter::drawScaledAntialiasedRoundedRect_data()
 {
     QTest::addColumn<float>("scale");
 
-    for (float i = 0; i < 3; i += .1)
+    for (float i = 0; i < 3; i += .1f)
         QTest::newRow(QString(QLatin1String("scale=%1")).arg(i).toLatin1()) << i;
 }
 
@@ -1471,7 +1471,7 @@ void tst_QPainter::drawScaledBorderPixmapRoundedRect_data()
     QTest::addColumn<float>("scale");
     QTest::addColumn<int>("imageType");
 
-    for (float i = 0; i < 3; i += .1)
+    for (float i = 0; i < 3; i += .1f)
         QTest::newRow(QString(QLatin1String("scale=%1; imagetype=ARGB32_Pre")).arg(i).toLatin1()) << i << (int)QImage::Format_ARGB32_Premultiplied;
     //for (float i = 0; i < 3; i += .1)
     //    QTest::newRow(QString(QLatin1String("scale=%1; imagetype=ARGB8565_Pre")).arg(i).toLatin1()) << i << (int)QImage::Format_ARGB8565_Premultiplied;
diff --git a/tests/benchmarks/gui/painting/qtbench/tst_qtbench.cpp b/tests/benchmarks/gui/painting/qtbench/tst_qtbench.cpp
index 823eb404e2..e17f8c6436 100644
--- a/tests/benchmarks/gui/painting/qtbench/tst_qtbench.cpp
+++ b/tests/benchmarks/gui/painting/qtbench/tst_qtbench.cpp
@@ -152,7 +152,7 @@ private slots:
 QString makeString(int length)
 {
     const char chars[] = "abcd efgh ijkl mnop qrst uvwx yz!$. ABCD 1234";
-    int len = strlen(chars);
+    const int len = int(strlen(chars));
 
     QString ret;
     for (int j = 0; j < length; j++) {
diff --git a/tests/benchmarks/gui/text/qfontmetrics/main.cpp b/tests/benchmarks/gui/text/qfontmetrics/main.cpp
index f7515abd89..7df8e9407a 100644
--- a/tests/benchmarks/gui/text/qfontmetrics/main.cpp
+++ b/tests/benchmarks/gui/text/qfontmetrics/main.cpp
@@ -66,6 +66,7 @@ private:
 void tst_QFontMetrics::testQFontMetrics( const QFontMetrics &fm )
 {
     int fontHeight = fm.height();
+    Q_UNUSED(fontHeight)
 }
 
 void tst_QFontMetrics::fontmetrics_create()