diff --git a/Ix.NET/Source/System.Interactive.Async.Providers.Tests/System.Interactive.Async.Providers.Tests.csproj b/Ix.NET/Source/System.Interactive.Async.Providers.Tests/System.Interactive.Async.Providers.Tests.csproj
index f2e562ca3..186da6cef 100644
--- a/Ix.NET/Source/System.Interactive.Async.Providers.Tests/System.Interactive.Async.Providers.Tests.csproj
+++ b/Ix.NET/Source/System.Interactive.Async.Providers.Tests/System.Interactive.Async.Providers.Tests.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFrameworks>net48;net6.0;netcoreapp3.1</TargetFrameworks>
@@ -18,7 +18,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.0.0" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3">
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.1">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
diff --git a/Ix.NET/Source/System.Interactive.Async.Tests/System.Interactive.Async.Tests.csproj b/Ix.NET/Source/System.Interactive.Async.Tests/System.Interactive.Async.Tests.csproj
index 64e8f4db3..ba3c01aed 100644
--- a/Ix.NET/Source/System.Interactive.Async.Tests/System.Interactive.Async.Tests.csproj
+++ b/Ix.NET/Source/System.Interactive.Async.Tests/System.Interactive.Async.Tests.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFrameworks>net48;net6.0;netcoreapp3.1</TargetFrameworks>
@@ -18,7 +18,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.0.0" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.1" />
     <PackageReference Include="FluentAssertions" Version="6.4.0" />
     <PackageReference Include="xunit" Version="2.4.1" />
   </ItemGroup>
diff --git a/Ix.NET/Source/System.Interactive.Tests/System.Interactive.Tests.csproj b/Ix.NET/Source/System.Interactive.Tests/System.Interactive.Tests.csproj
index 7281ed090..70e2fe559 100644
--- a/Ix.NET/Source/System.Interactive.Tests/System.Interactive.Tests.csproj
+++ b/Ix.NET/Source/System.Interactive.Tests/System.Interactive.Tests.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFrameworks>net48;net6.0;netcoreapp3.1</TargetFrameworks>
@@ -17,7 +17,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.0.0" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.1" />
     <PackageReference Include="FluentAssertions" Version="6.4.0" />
     <PackageReference Include="xunit" Version="2.4.1" />
   </ItemGroup>
diff --git a/Ix.NET/Source/System.Linq.Async.Queryable.Tests/System.Linq.Async.Queryable.Tests.csproj b/Ix.NET/Source/System.Linq.Async.Queryable.Tests/System.Linq.Async.Queryable.Tests.csproj
index 6abdffd2c..0267c2023 100644
--- a/Ix.NET/Source/System.Linq.Async.Queryable.Tests/System.Linq.Async.Queryable.Tests.csproj
+++ b/Ix.NET/Source/System.Linq.Async.Queryable.Tests/System.Linq.Async.Queryable.Tests.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFrameworks>net48;net6.0;netcoreapp3.1</TargetFrameworks>
@@ -18,7 +18,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.0.0" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.1" />
     <PackageReference Include="FluentAssertions" Version="6.4.0" />
     <PackageReference Include="xunit" Version="2.4.1" />
   </ItemGroup>
diff --git a/Ix.NET/Source/System.Linq.Async.Tests/System.Linq.Async.Tests.csproj b/Ix.NET/Source/System.Linq.Async.Tests/System.Linq.Async.Tests.csproj
index ec7e2d5e4..5628a03a4 100644
--- a/Ix.NET/Source/System.Linq.Async.Tests/System.Linq.Async.Tests.csproj
+++ b/Ix.NET/Source/System.Linq.Async.Tests/System.Linq.Async.Tests.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFrameworks>net48;net6.0;netcoreapp3.1</TargetFrameworks>
@@ -40,7 +40,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.0.0" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.1" />
     <PackageReference Include="FluentAssertions" Version="6.4.0" />
     <PackageReference Include="xunit" Version="2.4.1" />
   </ItemGroup>