diff --git a/plugins/platforms/virtual/virtual_backend.h b/plugins/platforms/virtual/virtual_backend.h
--- a/plugins/platforms/virtual/virtual_backend.h
+++ b/plugins/platforms/virtual/virtual_backend.h
@@ -54,7 +54,7 @@
     QPainterBackend* createQPainterBackend() override;
     OpenGLBackend *createOpenGLBackend() override;
 
-    Q_INVOKABLE void setVirtualOutputs(int count, QVector<QRect> geometries = QVector<QRect>());
+    Q_INVOKABLE void setVirtualOutputs(int count, QVector<QRect> geometries = QVector<QRect>(), QVector<int> scales = QVector<int>());
 
     Outputs outputs() const override;
     Outputs enabledOutputs() const override;
diff --git a/plugins/platforms/virtual/virtual_backend.cpp b/plugins/platforms/virtual/virtual_backend.cpp
--- a/plugins/platforms/virtual/virtual_backend.cpp
+++ b/plugins/platforms/virtual/virtual_backend.cpp
@@ -124,9 +124,10 @@
     return m_enabledOutputs;
 }
 
-void VirtualBackend::setVirtualOutputs(int count, QVector<QRect> geometries)
+void VirtualBackend::setVirtualOutputs(int count, QVector<QRect> geometries, QVector<int> scales)
 {
     Q_ASSERT(geometries.size() == 0 || geometries.size() == count);
+    Q_ASSERT(scales.size() == 0 || scales.size() == count);
 
     bool countChanged = m_outputs.size() != count;
     qDeleteAll(m_outputs.begin(), m_outputs.end());
@@ -136,6 +137,9 @@
     int sumWidth = 0;
     for (int i = 0; i < count; i++) {
         VirtualOutput *vo = new VirtualOutput(this);
+        if (scales.size()) {
+            vo->setScale(scales.at(i));
+        }
         if (geometries.size()) {
             vo->setGeometry(geometries.at(i));
         } else if (!vo->geometry().isValid()) {