diff --git a/src/Umbraco.Core/Umbraco.Core.csproj b/src/Umbraco.Core/Umbraco.Core.csproj
index 6fa21130fc..fadf6b592d 100644
--- a/src/Umbraco.Core/Umbraco.Core.csproj
+++ b/src/Umbraco.Core/Umbraco.Core.csproj
@@ -39,5 +39,8 @@
         <AssemblyAttribute Include="System.Runtime.CompilerServices.InternalsVisibleTo">
             <_Parameter1>Umbraco.Tests.Integration</_Parameter1>
         </AssemblyAttribute>
+        <AssemblyAttribute Include="System.Runtime.CompilerServices.InternalsVisibleTo">
+            <_Parameter1>DynamicProxyGenAssembly2</_Parameter1>
+        </AssemblyAttribute>
     </ItemGroup>
 </Project>
diff --git a/src/Umbraco.Infrastructure/Umbraco.Infrastructure.csproj b/src/Umbraco.Infrastructure/Umbraco.Infrastructure.csproj
index 2b663431ae..5c27322a68 100644
--- a/src/Umbraco.Infrastructure/Umbraco.Infrastructure.csproj
+++ b/src/Umbraco.Infrastructure/Umbraco.Infrastructure.csproj
@@ -90,6 +90,9 @@
         <AssemblyAttribute Include="System.Runtime.CompilerServices.InternalsVisibleTo">
             <_Parameter1>Umbraco.Tests.UnitTests</_Parameter1>
         </AssemblyAttribute>
+        <AssemblyAttribute Include="System.Runtime.CompilerServices.InternalsVisibleTo">
+            <_Parameter1>DynamicProxyGenAssembly2</_Parameter1>
+        </AssemblyAttribute>
     </ItemGroup>
 
     <ItemGroup>
diff --git a/src/Umbraco.PublishedCache.NuCache/Umbraco.PublishedCache.NuCache.csproj b/src/Umbraco.PublishedCache.NuCache/Umbraco.PublishedCache.NuCache.csproj
index 4a7733a810..a44ffcadb7 100644
--- a/src/Umbraco.PublishedCache.NuCache/Umbraco.PublishedCache.NuCache.csproj
+++ b/src/Umbraco.PublishedCache.NuCache/Umbraco.PublishedCache.NuCache.csproj
@@ -27,6 +27,9 @@
         <AssemblyAttribute Include="System.Runtime.CompilerServices.InternalsVisibleTo">
             <_Parameter1>Umbraco.Tests.Benchmarks</_Parameter1>
         </AssemblyAttribute>
+        <AssemblyAttribute Include="System.Runtime.CompilerServices.InternalsVisibleTo">
+            <_Parameter1>DynamicProxyGenAssembly2</_Parameter1>
+        </AssemblyAttribute>
     </ItemGroup>
 
 </Project>
diff --git a/src/Umbraco.Tests/TestHelpers/Stubs/TestControllerFactory.cs b/src/Umbraco.Tests/TestHelpers/Stubs/TestControllerFactory.cs
index d0348cf589..c2bb9032d2 100644
--- a/src/Umbraco.Tests/TestHelpers/Stubs/TestControllerFactory.cs
+++ b/src/Umbraco.Tests/TestHelpers/Stubs/TestControllerFactory.cs
@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.Linq;
 using System.Reflection;
+using System.Runtime.CompilerServices;
 using System.Web.Mvc;
 using System.Web.Routing;
 using System.Web.SessionState;
@@ -12,6 +13,7 @@ using Umbraco.Core.Composing;
 using Umbraco.Web;
 using Current = Umbraco.Web.Composing.Current;
 
+[assembly: InternalsVisibleTo("DynamicProxyGenAssembly2")]
 namespace Umbraco.Tests.TestHelpers.Stubs
 {
     /// <summary>