Index: Ringtoets/Revetment/src/Ringtoets.Revetment.Forms/PropertyClasses/WaveConditionsOutputProperties.cs
===================================================================
diff -u -r6300c24a20d2bc8bf9d2e66b727d8fc8e5d2ff54 -r2019968ec46375ee661021e396120c90185fb430
--- Ringtoets/Revetment/src/Ringtoets.Revetment.Forms/PropertyClasses/WaveConditionsOutputProperties.cs	(.../WaveConditionsOutputProperties.cs)	(revision 6300c24a20d2bc8bf9d2e66b727d8fc8e5d2ff54)
+++ Ringtoets/Revetment/src/Ringtoets.Revetment.Forms/PropertyClasses/WaveConditionsOutputProperties.cs	(.../WaveConditionsOutputProperties.cs)	(revision 2019968ec46375ee661021e396120c90185fb430)
@@ -19,6 +19,7 @@
 // Stichting Deltares and remain full property of Stichting Deltares at all times.
 // All rights reserved.
 
+using System;
 using System.ComponentModel;
 using Core.Common.Base.Data;
 using Core.Common.Gui.PropertyBag;
@@ -83,5 +84,10 @@
                 return data.WaveAngle;
             }
         }
+
+        public override string ToString()
+        {
+            return string.Empty;
+        }
     }
 }
\ No newline at end of file
Index: Ringtoets/StabilityStoneCover/src/Ringtoets.StabilityStoneCover.Forms/PropertyClasses/StabilityStoneCoverWaveConditionsOutputProperties.cs
===================================================================
diff -u -r37213b379dafd60f815fce7cb7fd70e8b85d0ec5 -r2019968ec46375ee661021e396120c90185fb430
--- Ringtoets/StabilityStoneCover/src/Ringtoets.StabilityStoneCover.Forms/PropertyClasses/StabilityStoneCoverWaveConditionsOutputProperties.cs	(.../StabilityStoneCoverWaveConditionsOutputProperties.cs)	(revision 37213b379dafd60f815fce7cb7fd70e8b85d0ec5)
+++ Ringtoets/StabilityStoneCover/src/Ringtoets.StabilityStoneCover.Forms/PropertyClasses/StabilityStoneCoverWaveConditionsOutputProperties.cs	(.../StabilityStoneCoverWaveConditionsOutputProperties.cs)	(revision 2019968ec46375ee661021e396120c90185fb430)
@@ -34,7 +34,6 @@
     /// <summary>
     /// ViewModel of <see cref="StabilityStoneCoverWaveConditionsOutput"/> for properties panel.
     /// </summary>
-    [TypeConverter(typeof(ExpandableObjectConverter))]
     public class StabilityStoneCoverWaveConditionsOutputProperties : ObjectProperties<StabilityStoneCoverWaveConditionsOutput>
     {
         [TypeConverter(typeof(ExpandableArrayConverter))]
Index: Ringtoets/StabilityStoneCover/test/Ringtoets.StabilityStoneCover.Forms.Test/PropertyClasses/StabilityStoneCoverWaveConditionsOutputPropertiesTest.cs
===================================================================
diff -u -r1d39fe9482efbe216335028d9bbceb8fc4563ab6 -r2019968ec46375ee661021e396120c90185fb430
--- Ringtoets/StabilityStoneCover/test/Ringtoets.StabilityStoneCover.Forms.Test/PropertyClasses/StabilityStoneCoverWaveConditionsOutputPropertiesTest.cs	(.../StabilityStoneCoverWaveConditionsOutputPropertiesTest.cs)	(revision 1d39fe9482efbe216335028d9bbceb8fc4563ab6)
+++ Ringtoets/StabilityStoneCover/test/Ringtoets.StabilityStoneCover.Forms.Test/PropertyClasses/StabilityStoneCoverWaveConditionsOutputPropertiesTest.cs	(.../StabilityStoneCoverWaveConditionsOutputPropertiesTest.cs)	(revision 2019968ec46375ee661021e396120c90185fb430)
@@ -113,16 +113,13 @@
             };
 
             // Call
-            TypeConverter classTypeConverter = TypeDescriptor.GetConverter(properties, true);
-            Assert.IsInstanceOf<ExpandableObjectConverter>(classTypeConverter);
-
-            // Asssert
             var propertyBag = new DynamicPropertyBag(properties);
             PropertyDescriptorCollection dynamicProperties = propertyBag.GetProperties(new Attribute[]
             {
                 new BrowsableAttribute(true)
             });
 
+            // Asssert
             Assert.AreEqual(2, dynamicProperties.Count);
 
             PropertyDescriptor blocksProperty = dynamicProperties[requiredBlockPropertyIndex];