diff --git a/tests/Avalonia.Controls.UnitTests/TextBlockTests.cs b/tests/Avalonia.Controls.UnitTests/TextBlockTests.cs
index eb1d6f5ea4..fc798fb737 100644
--- a/tests/Avalonia.Controls.UnitTests/TextBlockTests.cs
+++ b/tests/Avalonia.Controls.UnitTests/TextBlockTests.cs
@@ -170,6 +170,7 @@ namespace Avalonia.Controls.UnitTests
                 target.Inlines.Add("123456");
 
                 target.Measure(Size.Infinity);
+                target.Arrange(new Rect(target.DesiredSize));
 
                 Assert.True(button.IsMeasureValid);
                 Assert.Equal(80, button.DesiredSize.Width);