diff --git a/eng/Version.Details.xml b/eng/Version.Details.xml
index a0aa011e324c..b068ecfd264b 100644
--- a/eng/Version.Details.xml
+++ b/eng/Version.Details.xml
@@ -557,6 +557,20 @@
       <Uri>https://github.com/dotnet/runtime</Uri>
       <Sha>45155059d0b070e8ac0f6ad8f4909448e7eadd42</Sha>
     </Dependency>
+    <Dependency Name="Microsoft.Testing.Platform" Version="1.6.0-preview.25059.14">
+      <Uri>https://github.com/microsoft/testfx</Uri>
+      <Sha>53488cf463d33882113ca7a6fbbb6f93e06251df</Sha>
+    </Dependency>
+    <Dependency Name="MSTest" Version="3.8.0-preview.25059.14">
+      <Uri>https://github.com/microsoft/testfx</Uri>
+      <Sha>53488cf463d33882113ca7a6fbbb6f93e06251df</Sha>
+    </Dependency>
+    <!-- Intermediate is necessary for source build. -->
+    <Dependency Name="Microsoft.SourceBuild.Intermediate.testfx" Version="3.8.0-preview.25059.14">
+      <Uri>https://github.com/microsoft/testfx</Uri>
+      <Sha>53488cf463d33882113ca7a6fbbb6f93e06251df</Sha>
+      <SourceBuild RepoName="testfx" ManagedOnly="true" />
+    </Dependency>
   </ProductDependencies>
   <ToolsetDependencies>
     <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="10.0.0-beta.25058.4">
@@ -634,13 +648,5 @@
       <Uri>https://github.com/dotnet/runtime</Uri>
       <Sha>e77011b31a3e5c47d931248a64b47f9b2d47853d</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.Testing.Platform" Version="1.6.0-preview.25059.14">
-      <Uri>https://github.com/microsoft/testfx</Uri>
-      <Sha>53488cf463d33882113ca7a6fbbb6f93e06251df</Sha>
-    </Dependency>
-    <Dependency Name="MSTest" Version="3.8.0-preview.25059.14">
-      <Uri>https://github.com/microsoft/testfx</Uri>
-      <Sha>53488cf463d33882113ca7a6fbbb6f93e06251df</Sha>
-    </Dependency>
   </ToolsetDependencies>
 </Dependencies>
diff --git a/src/SourceBuild/content/repo-projects/sdk.proj b/src/SourceBuild/content/repo-projects/sdk.proj
index 6a14f437be1a..39eb90106ab6 100644
--- a/src/SourceBuild/content/repo-projects/sdk.proj
+++ b/src/SourceBuild/content/repo-projects/sdk.proj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.Build.NoTargets">
+<Project Sdk="Microsoft.Build.NoTargets">
 
   <PropertyGroup>
     <LogVerbosityOptOut>true</LogVerbosityOptOut>
@@ -60,6 +60,7 @@
     <RepositoryReference Include="sourcelink" />
     <RepositoryReference Include="symreader" />
     <RepositoryReference Include="templating" />
+    <RepositoryReference Include="testfx" />
     <RepositoryReference Include="vstest" />
     <RepositoryReference Include="windowsdesktop" Condition="'$(TargetOS)' == 'windows'" />
     <RepositoryReference Include="xdt" />
diff --git a/src/SourceBuild/content/repo-projects/testfx.proj b/src/SourceBuild/content/repo-projects/testfx.proj
new file mode 100644
index 000000000000..26762a0a7f61
--- /dev/null
+++ b/src/SourceBuild/content/repo-projects/testfx.proj
@@ -0,0 +1,15 @@
+<Project Sdk="Microsoft.Build.NoTargets">
+
+  <PropertyGroup>
+    <BuildArgs>$(BuildArgs) $(FlagParameterPrefix)warnAsError $(ArcadeFalseBoolBuildArg)</BuildArgs>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <RepositoryReference Include="arcade" />
+  </ItemGroup>
+
+  <ItemGroup Condition="'$(DotNetBuildSourceOnly)' == 'true'">
+    <RepositoryReference Include="source-build-reference-packages" />
+  </ItemGroup>
+
+</Project>