diff --git a/src/Umbraco.Tests/Plugins/PluginManagerTests.cs b/src/Umbraco.Tests/Plugins/PluginManagerTests.cs
index 3d7517778d..1eff533a0c 100644
--- a/src/Umbraco.Tests/Plugins/PluginManagerTests.cs
+++ b/src/Umbraco.Tests/Plugins/PluginManagerTests.cs
@@ -271,7 +271,7 @@ AnotherContentFinder
         public void Resolves_Assigned_Mappers()
         {
             var foundTypes1 = _manager.ResolveAssignedMapperTypes();
-            Assert.AreEqual(28, foundTypes1.Count());
+            Assert.AreEqual(29, foundTypes1.Count());
         }
 
         [Test]