Index: Ringtoets/Revetment/test/Ringtoets.Revetment.Data.Test/WaveConditionsInputTest.cs
===================================================================
diff -u -rb7e9a2c0ff0bb20209a80f5d96ffda1921ec724c -r07f3d67fe9512b3c8303ff09398b0a234900d546
--- Ringtoets/Revetment/test/Ringtoets.Revetment.Data.Test/WaveConditionsInputTest.cs	(.../WaveConditionsInputTest.cs)	(revision b7e9a2c0ff0bb20209a80f5d96ffda1921ec724c)
+++ Ringtoets/Revetment/test/Ringtoets.Revetment.Data.Test/WaveConditionsInputTest.cs	(.../WaveConditionsInputTest.cs)	(revision 07f3d67fe9512b3c8303ff09398b0a234900d546)
@@ -107,7 +107,7 @@
             var input = new WaveConditionsInput();
 
             // Assert
-            Assert.IsInstanceOf<Observable>(input);
+            Assert.IsInstanceOf<CloneableObservable>(input);
             Assert.IsInstanceOf<ICalculationInput>(input);
             Assert.IsInstanceOf<IUseBreakWater>(input);
             Assert.IsInstanceOf<IUseForeshore>(input);