diff --git a/tests/Avalonia.Markup.Xaml.UnitTests/Properties/AssemblyInfo.cs b/tests/Avalonia.Markup.Xaml.UnitTests/Properties/AssemblyInfo.cs
index a8034f484a..24cc853318 100644
--- a/tests/Avalonia.Markup.Xaml.UnitTests/Properties/AssemblyInfo.cs
+++ b/tests/Avalonia.Markup.Xaml.UnitTests/Properties/AssemblyInfo.cs
@@ -7,5 +7,4 @@ using Xunit;
 [assembly: AssemblyTitle("Avalonia.Markup.Xaml.UnitTests")]
 
 // Don't run tests in parallel.
-[assembly: CollectionBehavior(DisableTestParallelization = true)]
 [assembly: CollectionBehavior(MaxParallelThreads = 1)]