diff --git a/RubberduckTests/UnitTesting/MockedTestExplorer.cs b/RubberduckTests/UnitTesting/MockedTestExplorer.cs
index d8df212f5f..ee80e0c103 100644
--- a/RubberduckTests/UnitTesting/MockedTestExplorer.cs
+++ b/RubberduckTests/UnitTesting/MockedTestExplorer.cs
@@ -14,7 +14,7 @@ public MockedTestExplorer(MockedTestExplorerModel model)
             Vbe = model.Engine.Vbe.Object;
             State = model.Engine.ParserState;
             Model = model.Model;
-            ViewModel = new TestExplorerViewModel(null, Model, ClipboardWriter.Object, null, null);
+            ViewModel = new TestExplorerViewModel(null, Model, ClipboardWriter.Object, null, null, null);
         }
 
         public RubberduckParserState State { get; set; }