Index: src/Deltares.DSoilModel.Data/SosSoilLayer1D.cs
===================================================================
diff -u -r672 -r719
--- src/Deltares.DSoilModel.Data/SosSoilLayer1D.cs	(.../SosSoilLayer1D.cs)	(revision 672)
+++ src/Deltares.DSoilModel.Data/SosSoilLayer1D.cs	(.../SosSoilLayer1D.cs)	(revision 719)
@@ -120,9 +120,9 @@
         public virtual void Assign(SosSoilLayer1D layer)
         {
             base.Assign(layer);
-            RemarkTopLevel = this.remarkTopLevel;
-            MinimumTopLevel = this.minimumTopLevel;
-            MaximumTopLevel = this.maximumTopLevel;
+            remarkTopLevel = layer.RemarkTopLevel;
+            minimumTopLevel = layer.MinimumTopLevel;
+            maximumTopLevel = layer.MaximumTopLevel;
         }
     }
 }
\ No newline at end of file
Index: src/Deltares.DSoilModel.Data.Tests/SosSoilLayer1DTest.cs
===================================================================
diff -u -r680 -r719
--- src/Deltares.DSoilModel.Data.Tests/SosSoilLayer1DTest.cs	(.../SosSoilLayer1DTest.cs)	(revision 680)
+++ src/Deltares.DSoilModel.Data.Tests/SosSoilLayer1DTest.cs	(.../SosSoilLayer1DTest.cs)	(revision 719)
@@ -255,7 +255,6 @@
         }
 
         [Test]
-        [Category(Categories.WorkInProgress)]  // see issue DSB-535
         public void CloneTest()
         {
             var sosLayer1D = new SosSoilLayer1D()