diff --git a/src/Umbraco.Tests/Plugins/PluginManagerTests.cs b/src/Umbraco.Tests/Plugins/PluginManagerTests.cs
index d5461efd5d..a8c779d093 100644
--- a/src/Umbraco.Tests/Plugins/PluginManagerTests.cs
+++ b/src/Umbraco.Tests/Plugins/PluginManagerTests.cs
@@ -268,7 +268,7 @@ namespace Umbraco.Tests.Plugins
         public void Resolves_Assigned_Mappers()
         {
             var foundTypes1 = _manager.ResolveAssignedMapperTypes();
-            Assert.AreEqual(27, foundTypes1.Count());
+            Assert.AreEqual(28, foundTypes1.Count());
         }
 
         [Test]