diff --git a/src/Umbraco.Web.BackOffice/Umbraco.Web.BackOffice.csproj b/src/Umbraco.Web.BackOffice/Umbraco.Web.BackOffice.csproj
index d49eb6e4f5..967e2043f4 100644
--- a/src/Umbraco.Web.BackOffice/Umbraco.Web.BackOffice.csproj
+++ b/src/Umbraco.Web.BackOffice/Umbraco.Web.BackOffice.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
         <TargetFramework>net5.0</TargetFramework>
@@ -31,6 +31,11 @@
         <AssemblyAttribute Include="System.Runtime.CompilerServices.InternalsVisibleTo">
             <_Parameter1>Umbraco.Tests.Integration</_Parameter1>
         </AssemblyAttribute>
+
+      <!-- Making internals visible to Umbraco Forms -->
+      <AssemblyAttribute Include="System.Runtime.CompilerServices.InternalsVisibleTo">
+        <_Parameter1>Umbraco.Forms.Web</_Parameter1>
+      </AssemblyAttribute>
     </ItemGroup>
 
     <ItemGroup>
diff --git a/src/Umbraco.Web.Common/Umbraco.Web.Common.csproj b/src/Umbraco.Web.Common/Umbraco.Web.Common.csproj
index bb2ecbc346..24f20f2f4a 100644
--- a/src/Umbraco.Web.Common/Umbraco.Web.Common.csproj
+++ b/src/Umbraco.Web.Common/Umbraco.Web.Common.csproj
@@ -40,6 +40,11 @@
         <AssemblyAttribute Include="System.Runtime.CompilerServices.InternalsVisibleTo">
             <_Parameter1>Umbraco.Tests.UnitTests</_Parameter1>
         </AssemblyAttribute>
+
+      <!-- Making internals visible to Umbraco Forms -->
+      <AssemblyAttribute Include="System.Runtime.CompilerServices.InternalsVisibleTo">
+        <_Parameter1>Umbraco.Forms.Web</_Parameter1>
+      </AssemblyAttribute>
     </ItemGroup>
 
 </Project>
diff --git a/src/Umbraco.Web.Website/Umbraco.Web.Website.csproj b/src/Umbraco.Web.Website/Umbraco.Web.Website.csproj
index a7c5e7a277..31a2ef25b2 100644
--- a/src/Umbraco.Web.Website/Umbraco.Web.Website.csproj
+++ b/src/Umbraco.Web.Website/Umbraco.Web.Website.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
         <TargetFramework>net5.0</TargetFramework>
@@ -34,5 +34,10 @@
         <AssemblyAttribute Include="System.Runtime.CompilerServices.InternalsVisibleTo">
             <_Parameter1>Umbraco.Tests.Integration</_Parameter1>
         </AssemblyAttribute>
+
+      <!-- Making internals visible to Umbraco Forms -->
+      <AssemblyAttribute Include="System.Runtime.CompilerServices.InternalsVisibleTo">
+        <_Parameter1>Umbraco.Forms.Web</_Parameter1>
+      </AssemblyAttribute>
     </ItemGroup>
 </Project>