diff --git a/Directory.Packages.props b/Directory.Packages.props
index efa9ad7f16..ecccf47559 100644
--- a/Directory.Packages.props
+++ b/Directory.Packages.props
@@ -58,7 +58,7 @@
     <PackageVersion Include="Microsoft.Win32.Registry" Version="5.0.0" />
     <PackageVersion Include="Microsoft.WindowsAppSDK" Version="1.8.251003001" />
     <PackageVersion Include="OpenTelemetry" Version="1.14.0" />
-    <PackageVersion Include="Polyfill" Version="9.7.3" />
+    <PackageVersion Include="Polyfill" Version="9.12.0" />
     <PackageVersion Include="System.Threading.Tasks.Extensions" Version="$(SystemThreadingTasksExtensionsVersion)" />
   </ItemGroup>
   <ItemGroup Label="Test dependencies">
diff --git a/src/Platform/Microsoft.Testing.Extensions.VSTestBridge/TestHostControllers/RunSettingsEnvironmentVariableProvider.cs b/src/Platform/Microsoft.Testing.Extensions.VSTestBridge/TestHostControllers/RunSettingsEnvironmentVariableProvider.cs
index 31cacda715..76c9567e97 100644
--- a/src/Platform/Microsoft.Testing.Extensions.VSTestBridge/TestHostControllers/RunSettingsEnvironmentVariableProvider.cs
+++ b/src/Platform/Microsoft.Testing.Extensions.VSTestBridge/TestHostControllers/RunSettingsEnvironmentVariableProvider.cs
@@ -69,12 +69,7 @@ public async Task<bool> IsEnabledAsync()
         if (runSettingsFilePath is not null)
         {
             using IFileStream fileStream = _fileSystem.NewFileStream(runSettingsFilePath, FileMode.Open, FileAccess.Read);
-#if NETCOREAPP
             _runSettings = await XDocument.LoadAsync(fileStream.Stream, LoadOptions.None, CancellationToken.None).ConfigureAwait(false);
-#else
-            using StreamReader streamReader = new(fileStream.Stream);
-            _runSettings = XDocument.Parse(await streamReader.ReadToEndAsync().ConfigureAwait(false));
-#endif
         }
         else if (!RoslynString.IsNullOrEmpty(runSettingsContent))
         {