diff --git a/Rx.NET/Source/tests/Tests.System.Reactive.Uwp.DeviceRunner/Tests.System.Reactive.Uwp.DeviceRunner.csproj b/Rx.NET/Source/tests/Tests.System.Reactive.Uwp.DeviceRunner/Tests.System.Reactive.Uwp.DeviceRunner.csproj
index 7a025bb0e..c8b73fb04 100644
--- a/Rx.NET/Source/tests/Tests.System.Reactive.Uwp.DeviceRunner/Tests.System.Reactive.Uwp.DeviceRunner.csproj
+++ b/Rx.NET/Source/tests/Tests.System.Reactive.Uwp.DeviceRunner/Tests.System.Reactive.Uwp.DeviceRunner.csproj
@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="15.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
   <PropertyGroup>
@@ -141,7 +141,7 @@
     <PackageReference Include="Microsoft.NETCore.UniversalWindowsPlatform" Version="6.2.14" />
     <PackageReference Include="MSTest.TestAdapter" Version="3.0.2" />
     <PackageReference Include="MSTest.TestFramework" Version="3.0.2" />
-    <PackageReference Include="xunit.assert" Version="2.4.2" />
+    <PackageReference Include="xunit.assert" Version="2.6.2" />
   </ItemGroup>
   <ItemGroup>
     <ApplicationDefinition Include="App.xaml">
diff --git a/Rx.NET/Source/tests/Tests.System.Reactive/Tests.System.Reactive.csproj b/Rx.NET/Source/tests/Tests.System.Reactive/Tests.System.Reactive.csproj
index 00d1d52dc..b8b60e12f 100644
--- a/Rx.NET/Source/tests/Tests.System.Reactive/Tests.System.Reactive.csproj
+++ b/Rx.NET/Source/tests/Tests.System.Reactive/Tests.System.Reactive.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="MSBuild.Sdk.Extras">
+<Project Sdk="MSBuild.Sdk.Extras">
 
   <PropertyGroup>
     <TargetFrameworks>net472;net6.0;net7.0;net6.0-windows10.0.19041;net8.0;net8.0-windows10.0.19041</TargetFrameworks>
@@ -31,7 +31,7 @@
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.5.0" />
     <PackageReference Include="MSTest.TestAdapter" Version="3.0.2" />
     <PackageReference Include="MSTest.TestFramework" Version="3.0.2" />
-    <PackageReference Include="xunit.assert" Version="2.4.2" />
+    <PackageReference Include="xunit.assert" Version="2.6.2" />
     <ProjectReference Include="..\..\src\System.Reactive\System.Reactive.csproj" />
     <ProjectReference Include="..\..\src\System.Reactive.Observable.Aliases\System.Reactive.Observable.Aliases.csproj" />
     <ProjectReference Include="..\..\src\Microsoft.Reactive.Testing\Microsoft.Reactive.Testing.csproj" />