Index: Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Data/GrassCoverErosionInwardsOutput.cs
===================================================================
diff -u -ra64e778ac45d89e0bc35900b5c5b4a85e1f24089 -re7f6578ada32ed199d2b028ebb5eaeb691344592
--- Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Data/GrassCoverErosionInwardsOutput.cs	(.../GrassCoverErosionInwardsOutput.cs)	(revision a64e778ac45d89e0bc35900b5c5b4a85e1f24089)
+++ Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Data/GrassCoverErosionInwardsOutput.cs	(.../GrassCoverErosionInwardsOutput.cs)	(revision e7f6578ada32ed199d2b028ebb5eaeb691344592)
@@ -28,7 +28,7 @@
     /// <summary>
     /// The overall result of a grass cover erosion inwards assessment.
     /// </summary>
-    public class GrassCoverErosionInwardsOutput : Observable, ICalculationOutput
+    public class GrassCoverErosionInwardsOutput : Observable, ICalculationOutput, ICloneable
     {
         /// <summary>
         /// Creates a new instance of <see cref="GrassCoverErosionInwardsOutput"/>.
@@ -54,16 +54,27 @@
         /// <summary>
         /// Gets the overtopping output.
         /// </summary>
-        public OvertoppingOutput OvertoppingOutput { get; }
+        public OvertoppingOutput OvertoppingOutput { get; private set; }
 
         /// <summary>
         /// Gets the dike height output.
         /// </summary>
-        public DikeHeightOutput DikeHeightOutput { get; }
+        public DikeHeightOutput DikeHeightOutput { get; private set; }
 
         /// <summary>
         /// Gets the overtopping rate output.
         /// </summary>
-        public OvertoppingRateOutput OvertoppingRateOutput { get; }
+        public OvertoppingRateOutput OvertoppingRateOutput { get; private set; }
+
+        public object Clone()
+        {
+            var clone = (GrassCoverErosionInwardsOutput) MemberwiseClone();
+
+            clone.OvertoppingOutput = (OvertoppingOutput) OvertoppingOutput.Clone();
+            clone.DikeHeightOutput = (DikeHeightOutput) DikeHeightOutput.Clone();
+            clone.OvertoppingRateOutput = (OvertoppingRateOutput) OvertoppingRateOutput.Clone();
+
+            return clone;
+        }
     }
 }
\ No newline at end of file
Index: Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Data.Test/DikeHeightOutputTest.cs
===================================================================
diff -u -r129a499de1e263e11a64ce31b0da70431120e264 -re7f6578ada32ed199d2b028ebb5eaeb691344592
--- Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Data.Test/DikeHeightOutputTest.cs	(.../DikeHeightOutputTest.cs)	(revision 129a499de1e263e11a64ce31b0da70431120e264)
+++ Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Data.Test/DikeHeightOutputTest.cs	(.../DikeHeightOutputTest.cs)	(revision e7f6578ada32ed199d2b028ebb5eaeb691344592)
@@ -117,11 +117,7 @@
             object clone = original.Clone();
 
             // Assert
-            CloneAssert.AreClones(original, clone, (o, c) =>
-            {
-                CustomCloneAssert.AreClones(o, c);
-                Assert.AreEqual(o.DikeHeight, c.DikeHeight);
-            });
+            CloneAssert.AreClones(original, clone, CustomCloneAssert.AreClones);
         }
     }
 }
\ No newline at end of file
Index: Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Data.Test/GrassCoverErosionInwardsOutputTest.cs
===================================================================
diff -u -r3c5eb8dc63626571ddee036cac675707bd0b0ff0 -re7f6578ada32ed199d2b028ebb5eaeb691344592
--- Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Data.Test/GrassCoverErosionInwardsOutputTest.cs	(.../GrassCoverErosionInwardsOutputTest.cs)	(revision 3c5eb8dc63626571ddee036cac675707bd0b0ff0)
+++ Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Data.Test/GrassCoverErosionInwardsOutputTest.cs	(.../GrassCoverErosionInwardsOutputTest.cs)	(revision e7f6578ada32ed199d2b028ebb5eaeb691344592)
@@ -24,6 +24,8 @@
 using NUnit.Framework;
 using Ringtoets.Common.Data.Calculation;
 using Ringtoets.GrassCoverErosionInwards.Data.TestUtil;
+using CloneAssert = Core.Common.Data.TestUtil.CloneAssert;
+using CustomCloneAssert = Ringtoets.GrassCoverErosionInwards.Data.TestUtil.CloneAssert;
 
 namespace Ringtoets.GrassCoverErosionInwards.Data.Test
 {
@@ -63,5 +65,26 @@
             Assert.AreSame(dikeHeightOutput, output.DikeHeightOutput);
             Assert.AreSame(overtoppingRateOutput, output.OvertoppingRateOutput);
         }
+
+        [Test]
+        public void Clone_Always_ReturnNewInstanceWithCopiedValues()
+        {
+            // Setup
+            var random = new Random(21);
+            var original = new GrassCoverErosionInwardsOutput(new TestOvertoppingOutput(random.NextDouble()),
+                                                              new TestDikeHeightOutput(random.NextDouble()),
+                                                              new TestOvertoppingRateOutput(random.NextDouble()));
+
+            // Call
+            object clone = original.Clone();
+
+            // Assert
+            CloneAssert.AreClones(original, clone, (o, c) =>
+            {
+                CloneAssert.AreClones(o.OvertoppingOutput, c.OvertoppingOutput, CustomCloneAssert.AreClones);
+                CloneAssert.AreClones(o.DikeHeightOutput, c.DikeHeightOutput, CustomCloneAssert.AreClones);
+                CloneAssert.AreClones(o.OvertoppingRateOutput, c.OvertoppingRateOutput, CustomCloneAssert.AreClones);
+            });
+        }
     }
 }
\ No newline at end of file
Index: Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Data.Test/OvertoppingOutputTest.cs
===================================================================
diff -u -rac1f0a30b87d9fa5dccb288115189b032035acde -re7f6578ada32ed199d2b028ebb5eaeb691344592
--- Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Data.Test/OvertoppingOutputTest.cs	(.../OvertoppingOutputTest.cs)	(revision ac1f0a30b87d9fa5dccb288115189b032035acde)
+++ Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Data.Test/OvertoppingOutputTest.cs	(.../OvertoppingOutputTest.cs)	(revision e7f6578ada32ed199d2b028ebb5eaeb691344592)
@@ -27,7 +27,7 @@
 using Ringtoets.Common.Data.TestUtil;
 using Ringtoets.Common.Data.TestUtil.IllustrationPoints;
 using CloneAssert = Core.Common.Data.TestUtil.CloneAssert;
-using CustomCloneAssert = Ringtoets.Common.Data.TestUtil.CloneAssert;
+using CustomCloneAssert = Ringtoets.GrassCoverErosionInwards.Data.TestUtil.CloneAssert;
 
 namespace Ringtoets.GrassCoverErosionInwards.Data.Test
 {
@@ -111,12 +111,7 @@
             object clone = original.Clone();
 
             // Assert
-            CloneAssert.AreClones(original, clone, (o, c) =>
-            {
-                Assert.AreEqual(o.WaveHeight, c.WaveHeight);
-                Assert.AreEqual(o.IsOvertoppingDominant, c.IsOvertoppingDominant);
-                CloneAssert.AreClones(o.ProbabilityAssessmentOutput, c.ProbabilityAssessmentOutput, CustomCloneAssert.AreClones);
-            });
+            CloneAssert.AreClones(original, clone, CustomCloneAssert.AreClones);
         }
     }
 }
\ No newline at end of file
Index: Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Data.Test/OvertoppingRateOutputTest.cs
===================================================================
diff -u -r129a499de1e263e11a64ce31b0da70431120e264 -re7f6578ada32ed199d2b028ebb5eaeb691344592
--- Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Data.Test/OvertoppingRateOutputTest.cs	(.../OvertoppingRateOutputTest.cs)	(revision 129a499de1e263e11a64ce31b0da70431120e264)
+++ Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Data.Test/OvertoppingRateOutputTest.cs	(.../OvertoppingRateOutputTest.cs)	(revision e7f6578ada32ed199d2b028ebb5eaeb691344592)
@@ -121,11 +121,7 @@
             object clone = original.Clone();
 
             // Assert
-            CloneAssert.AreClones(original, clone, (o, c) =>
-            {
-                CustomCloneAssert.AreClones(o, c);
-                Assert.AreEqual(o.OvertoppingRate, c.OvertoppingRate);
-            });
+            CloneAssert.AreClones(original, clone, CustomCloneAssert.AreClones);
         }
     }
 }
\ No newline at end of file
Index: Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Data.TestUtil/CloneAssert.cs
===================================================================
diff -u -r129a499de1e263e11a64ce31b0da70431120e264 -re7f6578ada32ed199d2b028ebb5eaeb691344592
--- Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Data.TestUtil/CloneAssert.cs	(.../CloneAssert.cs)	(revision 129a499de1e263e11a64ce31b0da70431120e264)
+++ Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Data.TestUtil/CloneAssert.cs	(.../CloneAssert.cs)	(revision e7f6578ada32ed199d2b028ebb5eaeb691344592)
@@ -20,6 +20,8 @@
 // All rights reserved.
 
 using NUnit.Framework;
+using BaseCloneAssert = Core.Common.Data.TestUtil.CloneAssert;
+using CommonCloneAssert = Ringtoets.Common.Data.TestUtil.CloneAssert;
 
 namespace Ringtoets.GrassCoverErosionInwards.Data.TestUtil
 {
@@ -36,6 +38,21 @@
         /// <param name="clone">The cloned object.</param>
         /// <exception cref="AssertionException">Thrown when <paramref name="original"/> and
         /// <paramref name="clone"/> are not clones.</exception>
+        public static void AreClones(OvertoppingOutput original, OvertoppingOutput clone)
+        {
+            Assert.AreEqual(original.WaveHeight, clone.WaveHeight);
+            Assert.AreEqual(original.IsOvertoppingDominant, clone.IsOvertoppingDominant);
+            BaseCloneAssert.AreClones(original.ProbabilityAssessmentOutput, clone.ProbabilityAssessmentOutput, CommonCloneAssert.AreClones);
+        }
+
+        /// <summary>
+        /// Method that asserts whether <paramref name="original"/> and <paramref name="clone"/>
+        /// are clones.
+        /// </summary>
+        /// <param name="original">The original object.</param>
+        /// <param name="clone">The cloned object.</param>
+        /// <exception cref="AssertionException">Thrown when <paramref name="original"/> and
+        /// <paramref name="clone"/> are not clones.</exception>
         public static void AreClones(HydraulicLoadsOutput original, HydraulicLoadsOutput clone)
         {
             Assert.AreEqual(original.TargetProbability, clone.TargetProbability);
@@ -44,5 +61,33 @@
             Assert.AreEqual(original.CalculatedReliability, clone.CalculatedReliability);
             Assert.AreEqual(original.CalculationConvergence, clone.CalculationConvergence);
         }
+
+        /// <summary>
+        /// Method that asserts whether <paramref name="original"/> and <paramref name="clone"/>
+        /// are clones.
+        /// </summary>
+        /// <param name="original">The original object.</param>
+        /// <param name="clone">The cloned object.</param>
+        /// <exception cref="AssertionException">Thrown when <paramref name="original"/> and
+        /// <paramref name="clone"/> are not clones.</exception>
+        public static void AreClones(DikeHeightOutput original, DikeHeightOutput clone)
+        {
+            AreClones((HydraulicLoadsOutput) original, clone);
+            Assert.AreEqual(original.DikeHeight, clone.DikeHeight);
+        }
+
+        /// <summary>
+        /// Method that asserts whether <paramref name="original"/> and <paramref name="clone"/>
+        /// are clones.
+        /// </summary>
+        /// <param name="original">The original object.</param>
+        /// <param name="clone">The cloned object.</param>
+        /// <exception cref="AssertionException">Thrown when <paramref name="original"/> and
+        /// <paramref name="clone"/> are not clones.</exception>
+        public static void AreClones(OvertoppingRateOutput original, OvertoppingRateOutput clone)
+        {
+            AreClones((HydraulicLoadsOutput) original, clone);
+            Assert.AreEqual(original.OvertoppingRate, clone.OvertoppingRate);
+        }
     }
-}
+}
\ No newline at end of file
Index: Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Data.TestUtil/Ringtoets.GrassCoverErosionInwards.Data.TestUtil.csproj
===================================================================
diff -u -r129a499de1e263e11a64ce31b0da70431120e264 -re7f6578ada32ed199d2b028ebb5eaeb691344592
--- Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Data.TestUtil/Ringtoets.GrassCoverErosionInwards.Data.TestUtil.csproj	(.../Ringtoets.GrassCoverErosionInwards.Data.TestUtil.csproj)	(revision 129a499de1e263e11a64ce31b0da70431120e264)
+++ Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Data.TestUtil/Ringtoets.GrassCoverErosionInwards.Data.TestUtil.csproj	(.../Ringtoets.GrassCoverErosionInwards.Data.TestUtil.csproj)	(revision e7f6578ada32ed199d2b028ebb5eaeb691344592)
@@ -63,12 +63,20 @@
       <Project>{3BBFD65B-B277-4E50-AE6D-BD24C3434609}</Project>
       <Name>Core.Common.Base</Name>
     </ProjectReference>
+    <ProjectReference Include="..\..\..\..\Core\Common\test\Core.Common.Data.TestUtil\Core.Common.Data.TestUtil.csproj">
+      <Project>{0b0d2dff-7e7e-4bb0-a007-61800c85809a}</Project>
+      <Name>Core.Common.Data.TestUtil</Name>
+    </ProjectReference>
     <ProjectReference Include="..\..\..\Common\src\Ringtoets.Common.Data\Ringtoets.Common.Data.csproj">
       <Project>{d4200f43-3f72-4f42-af0a-8ced416a38ec}</Project>
       <Name>Ringtoets.Common.Data</Name>
     </ProjectReference>
+    <ProjectReference Include="..\..\..\Common\test\Ringtoets.Common.Data.TestUtil\Ringtoets.Common.Data.TestUtil.csproj">
+      <Project>{4843d6e5-066f-4795-94f5-1d53932dd03c}</Project>
+      <Name>Ringtoets.Common.Data.TestUtil</Name>
+    </ProjectReference>
     <ProjectReference Include="..\..\src\Ringtoets.GrassCoverErosionInwards.Data\Ringtoets.GrassCoverErosionInwards.Data.csproj">
-      <Project>{90de728e-48ef-4665-ab38-3d88e41d9f4d}</Project>
+      <Project>{90DE728E-48EF-4665-AB38-3D88E41D9F4D}</Project>
       <Name>Ringtoets.GrassCoverErosionInwards.Data</Name>
     </ProjectReference>
   </ItemGroup>