diff --git a/src/Samples/TestEmbedded/UnitTestEmbedded/UnitTestEmbedded.csproj b/src/Samples/TestEmbedded/UnitTestEmbedded/UnitTestEmbedded.csproj
index 741b35af9..07d6fd9cd 100644
--- a/src/Samples/TestEmbedded/UnitTestEmbedded/UnitTestEmbedded.csproj
+++ b/src/Samples/TestEmbedded/UnitTestEmbedded/UnitTestEmbedded.csproj
@@ -27,6 +27,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/src/Tests/DiagnosticTests/DiagnosticTests.csproj b/src/Tests/DiagnosticTests/DiagnosticTests.csproj
index 24918520f..8002d51f4 100644
--- a/src/Tests/DiagnosticTests/DiagnosticTests.csproj
+++ b/src/Tests/DiagnosticTests/DiagnosticTests.csproj
@@ -10,7 +10,8 @@
     <PackageReference Include="NUnit3TestAdapter" Version="3.16.1" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.5.0" />
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="3.8.0" PrivateAssets="all" />
-    <PackageReference Include="Microsoft.CodeAnalysis.Analyzers" Version="3.3.0" PrivateAssets="all" />    
+    <PackageReference Include="Microsoft.CodeAnalysis.Analyzers" Version="3.3.0" PrivateAssets="all" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/src/Tests/ObjectLifetimeTests/ObjectLifetimeTests.Lifted.csproj b/src/Tests/ObjectLifetimeTests/ObjectLifetimeTests.Lifted.csproj
index 206a3f1e9..152b51a06 100644
--- a/src/Tests/ObjectLifetimeTests/ObjectLifetimeTests.Lifted.csproj
+++ b/src/Tests/ObjectLifetimeTests/ObjectLifetimeTests.Lifted.csproj
@@ -58,6 +58,7 @@
         <PackageReference Include="MSTest.TestFramework">
             <Version>2.2.4-preview-20210513-02</Version>
         </PackageReference>
+        <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
     </ItemGroup>
 
     <ItemGroup>
diff --git a/src/Tests/UnitTest/UnitTest.csproj b/src/Tests/UnitTest/UnitTest.csproj
index 4ecfed5e5..a17ac4686 100644
--- a/src/Tests/UnitTest/UnitTest.csproj
+++ b/src/Tests/UnitTest/UnitTest.csproj
@@ -38,6 +38,7 @@
         <PrivateAssets>all</PrivateAssets>
         <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp2.0'">