Updated render test

tests/Avalonia.RenderTests/Controls/CommandBarTests.cs

@@ -25,6 +25,16 @@ namespace Avalonia.Direct2D1.RenderTests.Controls
             Setters = { new Setter(TextBlock.FontFamilyProperty, TestFontFamily) }
         };
 
+        private static Style OverflowLabelRectStyle => new Style(x => x.OfType<CommandBarButton>().Template().Name("PART_Label"))
+        {
+            Setters =
+            {
+                new Setter(TextBlock.WidthProperty, 50d),
+                new Setter(TextBlock.HeightProperty, 10d),
+                new Setter(TextBlock.BackgroundProperty, Brushes.Black),
+            }
+        };
+
         [Fact]
         public async Task CommandBar_Default_PrimaryCommands()
         {
@@ -156,8 +166,7 @@ namespace Avalonia.Direct2D1.RenderTests.Controls
                     Padding = new Thickness(4),
                     Child = new CommandBarButton
                     {
-                        Label = "Open",
-                        FontFamily = TestFontFamily,
+                        Label = string.Empty,
                         IsCompact = true,
                         IsInOverflow = true,
                         LabelPosition = CommandBarDefaultLabelPosition.Right,
@@ -175,8 +184,10 @@ namespace Avalonia.Direct2D1.RenderTests.Controls
 
             target.Styles.Add(new SimpleTheme());
             target.Styles.Add(FontStyle);
+            target.Styles.Add(OverflowLabelRectStyle);
             await RenderToFile(target);
             CompareImages(skipImmediate: true);
         }
+
     }
 }