diff --git a/docs/core/tutorials/snippets/library-with-visual-studio/csharp/StringLibraryTest/StringLibraryTest.csproj b/docs/core/tutorials/snippets/library-with-visual-studio/csharp/StringLibraryTest/StringLibraryTest.csproj
index 78f922644e83b..9784499ba623d 100644
--- a/docs/core/tutorials/snippets/library-with-visual-studio/csharp/StringLibraryTest/StringLibraryTest.csproj
+++ b/docs/core/tutorials/snippets/library-with-visual-studio/csharp/StringLibraryTest/StringLibraryTest.csproj
@@ -10,7 +10,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="MSTest" Version="4.0.2" />
+    <PackageReference Include="MSTest" Version="4.2.1" />
   </ItemGroup>
 
   <ItemGroup>