diff --git a/Src/Newtonsoft.Json.Tests/Newtonsoft.Json.Tests.Roslyn.csproj b/Src/Newtonsoft.Json.Tests/Newtonsoft.Json.Tests.Roslyn.csproj
index 92bda596..e09b6c63 100644
--- a/Src/Newtonsoft.Json.Tests/Newtonsoft.Json.Tests.Roslyn.csproj
+++ b/Src/Newtonsoft.Json.Tests/Newtonsoft.Json.Tests.Roslyn.csproj
@@ -13,6 +13,7 @@
     <NeutralLanguage>en-US</NeutralLanguage>
     <Copyright>Copyright © James Newton-King 2008</Copyright>
     <AssemblyName>Newtonsoft.Json.Tests</AssemblyName>
+    <RootNamespace>Newtonsoft.Json.Tests</RootNamespace>
     <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
     <!-- Workaround for https://github.com/nunit/nunit3-vs-adapter/issues/296 -->
     <DebugType Condition="'$(TargetFramework)' != '' AND '$(TargetFramework)' != 'netcoreapp1.0' AND '$(TargetFramework)' != 'netcoreapp1.1'">Full</DebugType>
diff --git a/Src/Newtonsoft.Json/Newtonsoft.Json.Roslyn.csproj b/Src/Newtonsoft.Json/Newtonsoft.Json.Roslyn.csproj
index cf2c0158..07a46e0d 100644
--- a/Src/Newtonsoft.Json/Newtonsoft.Json.Roslyn.csproj
+++ b/Src/Newtonsoft.Json/Newtonsoft.Json.Roslyn.csproj
@@ -18,6 +18,7 @@
     <PackageLicenseUrl>https://raw.github.com/JamesNK/Newtonsoft.Json/master/LICENSE.md</PackageLicenseUrl>
     <RepositoryUrl>https://github.com/JamesNK/Newtonsoft.Json</RepositoryUrl>
     <RepositoryType>git</RepositoryType>
+    <RootNamespace>Newtonsoft.Json</RootNamespace>
     <AssemblyName>Newtonsoft.Json</AssemblyName>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <GenerateAssemblyInfo>false</GenerateAssemblyInfo>