diff --git a/tests/Avalonia.Controls.UnitTests/DesktopStyleApplicationLifetimeTests.cs b/tests/Avalonia.Controls.UnitTests/DesktopStyleApplicationLifetimeTests.cs
index 837a62f40e..84f02aeda5 100644
--- a/tests/Avalonia.Controls.UnitTests/DesktopStyleApplicationLifetimeTests.cs
+++ b/tests/Avalonia.Controls.UnitTests/DesktopStyleApplicationLifetimeTests.cs
@@ -192,6 +192,7 @@ namespace Avalonia.Controls.UnitTests
             var windowImpl = new Mock<IWindowImpl>();
             windowImpl.SetupProperty(x => x.Closed);
             windowImpl.Setup(x => x.DesktopScaling).Returns(1);
+            windowImpl.Setup(x => x.RenderScaling).Returns(1);
 
             var services = TestServices.StyledWindow.With(
                 windowingPlatform: new MockWindowingPlatform(() => windowImpl.Object));
diff --git a/tests/Avalonia.UnitTests/MockWindowingPlatform.cs b/tests/Avalonia.UnitTests/MockWindowingPlatform.cs
index e265b49af3..67503ef0d0 100644
--- a/tests/Avalonia.UnitTests/MockWindowingPlatform.cs
+++ b/tests/Avalonia.UnitTests/MockWindowingPlatform.cs
@@ -30,6 +30,7 @@ namespace Avalonia.UnitTests
             windowImpl.Setup(x => x.ClientSize).Returns(() => clientSize);
             windowImpl.Setup(x => x.MaxAutoSizeHint).Returns(s_screenSize);
             windowImpl.Setup(x => x.DesktopScaling).Returns(1);
+            windowImpl.Setup(x => x.RenderScaling).Returns(1);
             windowImpl.Setup(x => x.Screen).Returns(CreateScreenMock().Object);
             windowImpl.Setup(x => x.Position).Returns(() => position);
             SetupToplevel(windowImpl);