Index: Src/GoogleApis/Properties/AssemblyInfo.cs
===================================================================
--- a/Src/GoogleApis/Properties/AssemblyInfo.cs
+++ b/Src/GoogleApis/Properties/AssemblyInfo.cs
@@ -30,6 +30,7 @@
 [assembly: AssemblyCulture("")]
 [assembly: InternalsVisibleTo("Google.Apis.Tests")]
 [assembly: InternalsVisibleTo("Google.Apis.Auth")]
+[assembly: InternalsVisibleTo("Google.Apis.Auth.PlatformServices")]
 [assembly: InternalsVisibleTo("Google.Apis.Authentication.OAuth2")]
 
 // The assembly version has the format "{Major}.{Minor}.{Build}.{Revision}".