diff --git a/src/gui/kernel/qhighdpiscaling.cpp b/src/gui/kernel/qhighdpiscaling.cpp
index 6c34af1f9f8..2f759158ee6 100644
--- a/src/gui/kernel/qhighdpiscaling.cpp
+++ b/src/gui/kernel/qhighdpiscaling.cpp
@@ -540,10 +540,8 @@ static const char scaleFactorProperty[] = "_q_scaleFactor";
 /*
     Sets a per-screen scale factor.
 */
-void QHighDpiScaling::setScreenFactor(QScreen *screen, qreal rawFactor)
+void QHighDpiScaling::setScreenFactor(QScreen *screen, qreal factor)
 {
-    qreal factor = roundScaleFactor(rawFactor);
-
     if (!qFuzzyCompare(factor, qreal(1))) {
         m_screenFactorSet = true;
         m_active = true;
diff --git a/tests/auto/gui/kernel/qhighdpi/tst_qhighdpi.cpp b/tests/auto/gui/kernel/qhighdpi/tst_qhighdpi.cpp
index 62f61e43fa7..f221c9db909 100644
--- a/tests/auto/gui/kernel/qhighdpi/tst_qhighdpi.cpp
+++ b/tests/auto/gui/kernel/qhighdpi/tst_qhighdpi.cpp
@@ -313,10 +313,9 @@ void tst_QHighDpi::environment_QT_SCREEN_SCALE_FACTORS()
     QFETCH(QByteArray, environment);
     QFETCH(QList<qreal>, expectedDprValues);
 
-    qputenv("QT_SCREEN_SCALE_FACTORS", environment);
-
     // Verify that setting QT_SCREEN_SCALE_FACTORS overrides the from-platform-screen-DPI DPR.
     {
+        qputenv("QT_SCREEN_SCALE_FACTORS", environment);
         std::unique_ptr<QGuiApplication> app(createStandardOffscreenApp(platformScreenDpi));
         int i = 0;
         for (QScreen *screen : app->screens()) {
@@ -328,18 +327,6 @@ void tst_QHighDpi::environment_QT_SCREEN_SCALE_FACTORS()
             QCOMPARE(window.devicePixelRatio(), expextedDpr);
         }
     }
-
-    // Verify that setHighDpiScaleFactorRoundingPolicy applies to QT_SCREEN_SCALE_FACTORS as well
-    QGuiApplication::setHighDpiScaleFactorRoundingPolicy(Qt::HighDpiScaleFactorRoundingPolicy::Round);
-    {
-        std::unique_ptr<QGuiApplication> app(createStandardOffscreenApp(platformScreenDpi));
-        int i = 0;
-        for (QScreen *screen : app->screens()) {
-            qreal expectedRounderDpr = qRound(expectedDprValues[i++]);
-            qreal windowDpr = QWindow(screen).devicePixelRatio();
-            QCOMPARE(windowDpr, expectedRounderDpr);
-        }
-    }
 }
 
 void tst_QHighDpi::environment_QT_USE_PHYSICAL_DPI()