diff --git a/test/Directory.Build.props b/test/Directory.Build.props
index 58979e35535..980f4c83a2b 100644
--- a/test/Directory.Build.props
+++ b/test/Directory.Build.props
@@ -24,6 +24,16 @@
     <VSTestLogger>$(VSTestLogger);html%3BLogFileName=TestResults-$(MSBuildProjectName)-$(TargetFramework)-$(RUNNER_OS).html</VSTestLogger>
   </PropertyGroup>
 
+  <ItemGroup Condition="'$(IsTestProject)' == 'true'">
+    <ProjectReference Include="$(MSBuildThisFileDirectory)Docfx.Tests.Common/Docfx.Tests.Common.csproj" />
+  </ItemGroup>
+
+  <!-- Set additional PackagesReferences to suppress warning MSB3277 (Assembly version conflict) -->
+  <ItemGroup>
+    <PackageReference Include="System.Collections.Immutable" />
+    <PackageReference Include="System.Text.Json" />
+  </ItemGroup>
+
   <ItemGroup>
     <PackageReference Include="FluentAssertions" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" />
diff --git a/test/Docfx.Build.ManagedReference.Tests/Docfx.Build.ManagedReference.Tests.csproj b/test/Docfx.Build.ManagedReference.Tests/Docfx.Build.ManagedReference.Tests.csproj
index 943a81c22c2..d2189eb119f 100644
--- a/test/Docfx.Build.ManagedReference.Tests/Docfx.Build.ManagedReference.Tests.csproj
+++ b/test/Docfx.Build.ManagedReference.Tests/Docfx.Build.ManagedReference.Tests.csproj
@@ -2,6 +2,5 @@
   <ItemGroup>
     <ProjectReference Include="..\..\src\Docfx.Build\Docfx.Build.csproj" />
     <ProjectReference Include="..\..\src\Docfx.Build.ManagedReference\Docfx.Build.ManagedReference.csproj" />
-    <ProjectReference Include="..\Docfx.Tests.Common\Docfx.Tests.Common.csproj" />
   </ItemGroup>
 </Project>
diff --git a/test/Docfx.Build.OverwriteDocuments.Tests/Docfx.Build.OverwriteDocuments.Tests.csproj b/test/Docfx.Build.OverwriteDocuments.Tests/Docfx.Build.OverwriteDocuments.Tests.csproj
index ada9e2ab801..8e3c524d874 100644
--- a/test/Docfx.Build.OverwriteDocuments.Tests/Docfx.Build.OverwriteDocuments.Tests.csproj
+++ b/test/Docfx.Build.OverwriteDocuments.Tests/Docfx.Build.OverwriteDocuments.Tests.csproj
@@ -4,6 +4,5 @@
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\..\src\Docfx.Build.OverwriteDocuments\Docfx.Build.OverwriteDocuments.csproj" />
-    <ProjectReference Include="..\Docfx.Tests.Common\Docfx.Tests.Common.csproj" />
   </ItemGroup>
 </Project>
diff --git a/test/Docfx.Build.RestApi.Tests/Docfx.Build.RestApi.Tests.csproj b/test/Docfx.Build.RestApi.Tests/Docfx.Build.RestApi.Tests.csproj
index 6632e67a6a9..e62f8103d22 100644
--- a/test/Docfx.Build.RestApi.Tests/Docfx.Build.RestApi.Tests.csproj
+++ b/test/Docfx.Build.RestApi.Tests/Docfx.Build.RestApi.Tests.csproj
@@ -11,6 +11,5 @@
     <ProjectReference Include="..\..\src\Docfx.Build\Docfx.Build.csproj" />
     <ProjectReference Include="..\..\src\Docfx.Build.ManagedReference\Docfx.Build.ManagedReference.csproj" />
     <ProjectReference Include="..\..\src\Docfx.Common\Docfx.Common.csproj" />
-    <ProjectReference Include="..\Docfx.Tests.Common\Docfx.Tests.Common.csproj" />
   </ItemGroup>
 </Project>
diff --git a/test/Docfx.Build.RestApi.WithPlugins.Tests/Docfx.Build.RestApi.WithPlugins.Tests.csproj b/test/Docfx.Build.RestApi.WithPlugins.Tests/Docfx.Build.RestApi.WithPlugins.Tests.csproj
index ac834570ef9..610b6f5bc54 100644
--- a/test/Docfx.Build.RestApi.WithPlugins.Tests/Docfx.Build.RestApi.WithPlugins.Tests.csproj
+++ b/test/Docfx.Build.RestApi.WithPlugins.Tests/Docfx.Build.RestApi.WithPlugins.Tests.csproj
@@ -7,6 +7,5 @@
     <ProjectReference Include="..\..\src\Docfx.Build.RestApi\Docfx.Build.RestApi.csproj" />
     <ProjectReference Include="..\..\src\Docfx.DataContracts.Common\Docfx.DataContracts.Common.csproj" />
     <ProjectReference Include="..\..\src\Docfx.DataContracts.RestApi\Docfx.DataContracts.RestApi.csproj" />
-    <ProjectReference Include="..\Docfx.Tests.Common\Docfx.Tests.Common.csproj" />
   </ItemGroup>
 </Project>
diff --git a/test/Docfx.Build.SchemaDriven.Tests/Docfx.Build.SchemaDriven.Tests.csproj b/test/Docfx.Build.SchemaDriven.Tests/Docfx.Build.SchemaDriven.Tests.csproj
index 4ed255dbd06..474324b4f13 100644
--- a/test/Docfx.Build.SchemaDriven.Tests/Docfx.Build.SchemaDriven.Tests.csproj
+++ b/test/Docfx.Build.SchemaDriven.Tests/Docfx.Build.SchemaDriven.Tests.csproj
@@ -6,6 +6,5 @@
     <ProjectReference Include="..\..\src\Docfx.DataContracts.Common\Docfx.DataContracts.Common.csproj" />
     <ProjectReference Include="..\..\src\Docfx.Plugins\Docfx.Plugins.csproj" />
     <ProjectReference Include="..\..\src\Docfx.YamlSerialization\Docfx.YamlSerialization.csproj" />
-    <ProjectReference Include="..\Docfx.Tests.Common\Docfx.Tests.Common.csproj" />
   </ItemGroup>
 </Project>
diff --git a/test/Docfx.Build.Tests/Docfx.Build.Tests.csproj b/test/Docfx.Build.Tests/Docfx.Build.Tests.csproj
index 61c730cef26..7a73d0fa005 100644
--- a/test/Docfx.Build.Tests/Docfx.Build.Tests.csproj
+++ b/test/Docfx.Build.Tests/Docfx.Build.Tests.csproj
@@ -10,13 +10,11 @@
   <ItemGroup>
     <ProjectReference Include="..\..\src\Docfx.Build.Common\Docfx.Build.Common.csproj" />
     <ProjectReference Include="..\..\src\Docfx.Build.ManagedReference\Docfx.Build.ManagedReference.csproj" />
-    <ProjectReference Include="..\..\src\Docfx.Build.RestApi\Docfx.Build.RestApi.csproj" />
     <ProjectReference Include="..\..\src\Docfx.Build.SchemaDriven\Docfx.Build.SchemaDriven.csproj" />
     <ProjectReference Include="..\..\src\Docfx.Build\Docfx.Build.csproj" />
     <ProjectReference Include="..\..\src\Docfx.Common\Docfx.Common.csproj" />
     <ProjectReference Include="..\..\src\Docfx.DataContracts.Common\Docfx.DataContracts.Common.csproj" />
     <ProjectReference Include="..\..\src\Docfx.Plugins\Docfx.Plugins.csproj" />
     <ProjectReference Include="..\..\src\Docfx.YamlSerialization\Docfx.YamlSerialization.csproj" />
-    <ProjectReference Include="..\Docfx.Tests.Common\Docfx.Tests.Common.csproj" />
   </ItemGroup>
 </Project>
diff --git a/test/Docfx.Build.Tests/XRefMapSerializationTest.cs b/test/Docfx.Build.Tests/XRefMapSerializationTest.cs
index 8ab4489200b..afae124e4ae 100644
--- a/test/Docfx.Build.Tests/XRefMapSerializationTest.cs
+++ b/test/Docfx.Build.Tests/XRefMapSerializationTest.cs
@@ -3,7 +3,6 @@
 
 using System.Text;
 using Docfx.Common;
-using Docfx.Plugins;
 using FluentAssertions;
 using Xunit;
 
diff --git a/test/Docfx.Build.UniversalReference.Tests/Docfx.Build.UniversalReference.Tests.csproj b/test/Docfx.Build.UniversalReference.Tests/Docfx.Build.UniversalReference.Tests.csproj
index 3aeb509bbd8..286e7730784 100644
--- a/test/Docfx.Build.UniversalReference.Tests/Docfx.Build.UniversalReference.Tests.csproj
+++ b/test/Docfx.Build.UniversalReference.Tests/Docfx.Build.UniversalReference.Tests.csproj
@@ -6,6 +6,5 @@
   <ItemGroup>
     <ProjectReference Include="..\..\src\Docfx.Build\Docfx.Build.csproj" />
     <ProjectReference Include="..\..\src\Docfx.Build.UniversalReference\Docfx.Build.UniversalReference.csproj" />
-    <ProjectReference Include="..\Docfx.Tests.Common\Docfx.Tests.Common.csproj" />
   </ItemGroup>
-</Project>
\ No newline at end of file
+</Project>
diff --git a/test/Docfx.Common.Tests/Docfx.Common.Tests.csproj b/test/Docfx.Common.Tests/Docfx.Common.Tests.csproj
index 241d5099754..ba18c40f876 100644
--- a/test/Docfx.Common.Tests/Docfx.Common.Tests.csproj
+++ b/test/Docfx.Common.Tests/Docfx.Common.Tests.csproj
@@ -3,6 +3,5 @@
     <ProjectReference Include="..\..\src\Docfx.YamlSerialization\Docfx.YamlSerialization.csproj" />
     <ProjectReference Include="..\..\src\Docfx.Plugins\Docfx.Plugins.csproj" />
     <ProjectReference Include="..\..\src\Docfx.Common\Docfx.Common.csproj" />
-    <ProjectReference Include="..\Docfx.Tests.Common\Docfx.Tests.Common.csproj" />
   </ItemGroup>
 </Project>
diff --git a/test/Docfx.Glob.Tests/Docfx.Glob.Tests.csproj b/test/Docfx.Glob.Tests/Docfx.Glob.Tests.csproj
index 38cbb3cdba2..659823ee298 100644
--- a/test/Docfx.Glob.Tests/Docfx.Glob.Tests.csproj
+++ b/test/Docfx.Glob.Tests/Docfx.Glob.Tests.csproj
@@ -1,6 +1,5 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <ItemGroup>
     <ProjectReference Include="..\..\src\Docfx.Glob\Docfx.Glob.csproj" />
-    <ProjectReference Include="..\Docfx.Tests.Common\Docfx.Tests.Common.csproj" />
   </ItemGroup>
 </Project>
diff --git a/test/Docfx.MarkdigEngine.Tests/Docfx.MarkdigEngine.Tests.csproj b/test/Docfx.MarkdigEngine.Tests/Docfx.MarkdigEngine.Tests.csproj
index 8c61517ccfb..a90ff20f42d 100644
--- a/test/Docfx.MarkdigEngine.Tests/Docfx.MarkdigEngine.Tests.csproj
+++ b/test/Docfx.MarkdigEngine.Tests/Docfx.MarkdigEngine.Tests.csproj
@@ -1,8 +1,5 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <ItemGroup>
-    <ProjectReference Include="..\..\src\Docfx.Build\Docfx.Build.csproj" />
-    <ProjectReference Include="..\..\src\Docfx.MarkdigEngine.Extensions\Docfx.MarkdigEngine.Extensions.csproj" />
     <ProjectReference Include="..\..\src\Docfx.MarkdigEngine\Docfx.MarkdigEngine.csproj" />
-    <ProjectReference Include="..\..\src\Docfx.Plugins\Docfx.Plugins.csproj" />
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/test/docfx.Tests/docfx.Tests.csproj b/test/docfx.Tests/docfx.Tests.csproj
index 4dd4811307a..13bd2fdfaf3 100644
--- a/test/docfx.Tests/docfx.Tests.csproj
+++ b/test/docfx.Tests/docfx.Tests.csproj
@@ -10,6 +10,5 @@
 
   <ItemGroup>
     <ProjectReference Include="..\..\src\docfx\docfx.csproj" />
-    <ProjectReference Include="..\Docfx.Tests.Common\Docfx.Tests.Common.csproj" />
   </ItemGroup>
 </Project>