1 files changed, 3 insertions, 2 deletions
diff --git a/tests/auto/corelib/serialization/qxmlstream/tst_qxmlstream.cpp b/tests/auto/corelib/serialization/qxmlstream/tst_qxmlstream.cpp
index 533fcd96f5..a2349a5846 100644
--- a/tests/auto/corelib/serialization/qxmlstream/tst_qxmlstream.cpp
+++ b/tests/auto/corelib/serialization/qxmlstream/tst_qxmlstream.cpp
@@ -1748,10 +1748,11 @@ static bool isValidSingleTextChar(const ushort c)
 
 void tst_QXmlStream::readBack() const
 {
+    QBuffer buffer;
+
     for (ushort c = 0; c < std::numeric_limits<ushort>::max(); ++c) {
-        QBuffer buffer;
 
-        QVERIFY(buffer.open(QIODevice::WriteOnly));
+        QVERIFY(buffer.open(QIODevice::WriteOnly|QIODevice::Truncate));
         QXmlStreamWriter writer(&buffer);
         writer.writeStartDocument();
         writer.writeTextElement("a", QString(QChar(c)));