diff --git a/Directory.Packages.props b/Directory.Packages.props
index 9a385bc36..30f15983f 100644
--- a/Directory.Packages.props
+++ b/Directory.Packages.props
@@ -36,9 +36,9 @@
     <PackageVersion Include="System.Runtime.CompilerServices.Unsafe" Version="6.1.2" />
     <PackageVersion Include="System.Threading.Tasks.Extensions" Version="4.6.3" />
     <PackageVersion Include="System.ValueTuple" Version="4.6.2" />
-    <PackageVersion Include="xunit.v3.core.mtp-v2" Version="3.2.2" />
-    <PackageVersion Include="Xunit.Combinatorial" Version="2.0.24" />
-    <PackageVersion Include="Xunit.StaFact" Version="3.0.13" />
+    <PackageVersion Include="xunit.v3.core.mtp-v2" Version="4.0.1" />
+    <PackageVersion Include="Xunit.Combinatorial" Version="2.1.41" />
+    <PackageVersion Include="Xunit.StaFact" Version="4.0.23" />
   </ItemGroup>
   <ItemGroup Label="Library.Template">
     <PackageVersion Include="Microsoft.Testing.Extensions.CodeCoverage" Version="18.11.0" />
@@ -47,7 +47,7 @@
     <PackageVersion Include="Microsoft.Testing.Extensions.Telemetry" Version="$(MicrosoftTestingPlatformVersion)" />
     <PackageVersion Include="Microsoft.Testing.Extensions.TrxReport" Version="$(MicrosoftTestingPlatformVersion)" />
     <PackageVersion Include="Microsoft.VisualStudio.Internal.MicroBuild.NonShipping" Version="$(MicroBuildVersion)" />
-    <PackageVersion Include="xunit.v3.mtp-v2" Version="3.2.2" />
+    <PackageVersion Include="xunit.v3.mtp-v2" Version="4.0.1" />
   </ItemGroup>
   <ItemGroup>
     <GlobalPackageReference Include="Microsoft.CodeAnalysis.ResxSourceGenerator" Version="5.0.0-1.25277.114" />
diff --git a/test/Microsoft.VisualStudio.Threading.Tests/AssemblyInfo.cs b/test/Microsoft.VisualStudio.Threading.Tests/AssemblyInfo.cs
index 194900e3c..8fbce1a4c 100644
--- a/test/Microsoft.VisualStudio.Threading.Tests/AssemblyInfo.cs
+++ b/test/Microsoft.VisualStudio.Threading.Tests/AssemblyInfo.cs
@@ -3,4 +3,4 @@
 
 // Some of our tests measure stress, GC pressure, etc.
 // It messes with reliable test results when other threads are doing random stuff.
-[assembly: CollectionBehavior(DisableTestParallelization = true)]
+[assembly: Xunit.v3.Parallelization(Mode = Xunit.Sdk.ParallelMode.None)]