diff --git a/test/test.harness/test.harness.csproj b/test/test.harness/test.harness.csproj
index 20f68e0d..b3861f89 100644
--- a/test/test.harness/test.harness.csproj
+++ b/test/test.harness/test.harness.csproj
@@ -5,7 +5,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.9.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.9.4" />
     <PackageReference Include="xunit" Version="2.4.1" />
   </ItemGroup>
 
diff --git a/test/test.xunit.runner.visualstudio/test.xunit.runner.visualstudio.csproj b/test/test.xunit.runner.visualstudio/test.xunit.runner.visualstudio.csproj
index 04642143..5a8f43a3 100644
--- a/test/test.xunit.runner.visualstudio/test.xunit.runner.visualstudio.csproj
+++ b/test/test.xunit.runner.visualstudio/test.xunit.runner.visualstudio.csproj
@@ -8,7 +8,7 @@
     <PackageReference Include="NSubstitute" Version="4.2.2" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="xunit.runner.reporters" Version="2.4.1" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.9.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.9.4" />
   </ItemGroup>
 
   <ItemGroup Condition=" '$(TargetFramework)' == 'net46' ">