diff --git a/tests/benchmarks/corelib/text/qstringlist/main.cpp b/tests/benchmarks/corelib/text/qstringlist/main.cpp
index 9f184d0cf58..0d41e934415 100644
--- a/tests/benchmarks/corelib/text/qstringlist/main.cpp
+++ b/tests/benchmarks/corelib/text/qstringlist/main.cpp
@@ -68,9 +68,9 @@ private:
 QStringList tst_QStringList::populateList(const int count, const QString &unit)
 {
     QStringList retval;
-
+    retval.reserve(count);
     for (int i = 0; i < count; ++i)
-        retval.append(unit);
+        retval.append(unit + QString::number(i));
 
     return retval;
 }
@@ -102,19 +102,19 @@ void tst_QStringList::join_data() const
     QTest::addColumn<QStringList>("input");
     QTest::addColumn<QString>("separator");
 
-    QTest::newRow("")
+    QTest::newRow("100")
         << populateList(100, QLatin1String("unit"))
         << QString();
 
-    QTest::newRow("")
+    QTest::newRow("1000")
         << populateList(1000, QLatin1String("unit"))
         << QString();
 
-    QTest::newRow("")
+    QTest::newRow("10000")
         << populateList(10000, QLatin1String("unit"))
         << QString();
 
-    QTest::newRow("")
+    QTest::newRow("100000")
         << populateList(100000, QLatin1String("unit"))
         << QString();
 }