diff --git a/tests/Avalonia.RenderTests/Media/BitmapTests.cs b/tests/Avalonia.RenderTests/Media/BitmapTests.cs
index 9e0ac5cf14..57f1e40d12 100644
--- a/tests/Avalonia.RenderTests/Media/BitmapTests.cs
+++ b/tests/Avalonia.RenderTests/Media/BitmapTests.cs
@@ -81,6 +81,7 @@ namespace Avalonia.Direct2D1.RenderTests.Media
             using (var target = r.CreateRenderTarget(new object[] { fb }))
             using (var ctx = target.CreateDrawingContext(null))
             {
+                ctx.Clear(Colors.Transparent);
                 ctx.PushOpacity(0.8);
                 ctx.FillRectangle(Brushes.Chartreuse, new Rect(0, 0, 20, 100));
                 ctx.FillRectangle(Brushes.Crimson, new Rect(20, 0, 20, 100));