diff --git a/src/VisualStudio/TestUtilities2/CodeModel/CodeModelTestHelpers.vb b/src/VisualStudio/TestUtilities2/CodeModel/CodeModelTestHelpers.vb
index f6e2651b07f949209a26ef299bff6630308f8e05..33a7669f474477a4c8868ef3b1243ab7d23c998f 100644
--- a/src/VisualStudio/TestUtilities2/CodeModel/CodeModelTestHelpers.vb
+++ b/src/VisualStudio/TestUtilities2/CodeModel/CodeModelTestHelpers.vb
@@ -97,11 +97,9 @@ Namespace Microsoft.VisualStudio.LanguageServices.UnitTests.CodeModel
             Implements IServiceProvider
 
             Private ReadOnly _componentModel As MockComponentModel
-            Private ReadOnly _extensibility As MockVsExtensibility
 
             Public Sub New(componentModel As MockComponentModel)
                 _componentModel = componentModel
-                _extensibility = New MockVsExtensibility()
             End Sub
 
             Public Function GetService(serviceType As Type) As Object Implements IServiceProvider.GetService