diff --git a/test/Directory.Build.props b/test/Directory.Build.props
index b37d237..4bb7298 100644
--- a/test/Directory.Build.props
+++ b/test/Directory.Build.props
@@ -3,5 +3,12 @@
     <IsTestProject>true</IsTestProject>
   </PropertyGroup>
 
+  <PropertyGroup Condition="!$([MSBuild]::IsOSPlatform('Linux'))">
+    <!-- Setup TFM properties for testing .NET Standard TFM's on supported platforms. -->
+    <PlatformTFMSuffix Condition="$([MSBuild]::IsOSPlatform('Windows'))">-windows</PlatformTFMSuffix>
+    <PlatformTFMSuffix Condition="$([MSBuild]::IsOSPlatform('OSX'))">-macos</PlatformTFMSuffix>
+    <DefaultNetStandardTestTFM >net6.0$(PlatformTFMSuffix)</DefaultNetStandardTestTFM>
+  </PropertyGroup>
+
   <Import Project="$(MSBuildThisFileDirectory)/../Directory.Build.props" />
 </Project>
diff --git a/test/Treasure.Utils.Argument.Benchmarks/Treasure.Utils.Argument.Benchmarks.csproj b/test/Treasure.Utils.Argument.Benchmarks/Treasure.Utils.Argument.Benchmarks.csproj
index 469066e..72acc45 100644
--- a/test/Treasure.Utils.Argument.Benchmarks/Treasure.Utils.Argument.Benchmarks.csproj
+++ b/test/Treasure.Utils.Argument.Benchmarks/Treasure.Utils.Argument.Benchmarks.csproj
@@ -3,6 +3,7 @@
   <PropertyGroup>
     <OutputType>Exe</OutputType>
     <TargetFrameworks>net7.0;net6.0</TargetFrameworks>
+    <TargetFrameworks Condition="!$([MSBuild]::IsOSPlatform('Linux'))">$(TargetFrameworks);net7.0$(PlatformTFMSuffix);net6.0$(PlatformTFMSuffix)</TargetFrameworks>
     <RootNamespace>Treasure.Utils.Benchmarks</RootNamespace>
     <IsTestProject>false</IsTestProject>
 
@@ -16,6 +17,9 @@
 
   <ItemGroup>
     <ProjectReference Include="..\..\src\Treasure.Utils.Argument\Treasure.Utils.Argument.csproj" />
+    <ProjectReference Update="..\..\src\Treasure.Utils.Argument\Treasure.Utils.Argument.csproj"
+                      Condition="$(TargetFramework.Contains($(PlatformTFMSuffix)))"
+                      SetTargetFramework="TargetFramework=netstandard2.1" />
   </ItemGroup>
 
 </Project>
diff --git a/test/Treasure.Utils.Argument.Tests/Treasure.Utils.Argument.Tests.csproj b/test/Treasure.Utils.Argument.Tests/Treasure.Utils.Argument.Tests.csproj
index 4087263..26c0d00 100644
--- a/test/Treasure.Utils.Argument.Tests/Treasure.Utils.Argument.Tests.csproj
+++ b/test/Treasure.Utils.Argument.Tests/Treasure.Utils.Argument.Tests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net6.0;net7.0</TargetFrameworks>
+    <TargetFrameworks>net6.0;$(DefaultNetStandardTestTFM);net7.0</TargetFrameworks>
     <RootNamespace>Treasure.Utils.Tests</RootNamespace>
 
     <IsPackable>false</IsPackable>
@@ -27,6 +27,9 @@
 
   <ItemGroup>
     <ProjectReference Include="..\..\src\Treasure.Utils.Argument\Treasure.Utils.Argument.csproj" />
+    <ProjectReference Update="..\..\src\Treasure.Utils.Argument\Treasure.Utils.Argument.csproj"
+                      Condition="$(TargetFramework.Contains($(PlatformTFMSuffix)))"
+                      SetTargetFramework="TargetFramework=netstandard2.1" />
   </ItemGroup>
 
 </Project>