Index: Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Data.Test/GrassCoverErosionInwardsInputTest.cs
===================================================================
diff -u -r30b8231f92b90ea4b05e98e3d0285368f6dfe2e4 -rf37230ff653580eb90dd878e6ecc4f15511a11d6
--- Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Data.Test/GrassCoverErosionInwardsInputTest.cs	(.../GrassCoverErosionInwardsInputTest.cs)	(revision 30b8231f92b90ea4b05e98e3d0285368f6dfe2e4)
+++ Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Data.Test/GrassCoverErosionInwardsInputTest.cs	(.../GrassCoverErosionInwardsInputTest.cs)	(revision f37230ff653580eb90dd878e6ecc4f15511a11d6)
@@ -129,7 +129,6 @@
         }
 
         [Test]
-        [Combinatorial]
         public void DikeProfile_SetNullValue_InputSyncedToDefaults()
         {
             // Setup
Index: Ringtoets/Revetment/src/Ringtoets.Revetment.Data/WaveConditionsInput.cs
===================================================================
diff -u -r48e1ce89dde79fee454de1157cf61b1c5525506a -rf37230ff653580eb90dd878e6ecc4f15511a11d6
--- Ringtoets/Revetment/src/Ringtoets.Revetment.Data/WaveConditionsInput.cs	(.../WaveConditionsInput.cs)	(revision 48e1ce89dde79fee454de1157cf61b1c5525506a)
+++ Ringtoets/Revetment/src/Ringtoets.Revetment.Data/WaveConditionsInput.cs	(.../WaveConditionsInput.cs)	(revision f37230ff653580eb90dd878e6ecc4f15511a11d6)
@@ -33,12 +33,19 @@
     public class WaveConditionsInput
     {
         private DikeProfile dikeProfile;
+        private RoundedDouble upperLevel;
+        private RoundedDouble lowerLevel;
+        private RoundedDouble stepSize;
 
         /// <summary>
         /// Creates a new instance of <see cref="WaveConditionsInput"/>.
         /// </summary>
         public WaveConditionsInput()
         {
+            upperLevel = new RoundedDouble(2);
+            lowerLevel = new RoundedDouble(2);
+            stepSize = new RoundedDouble(1);
+
             UpdateProfileParameters();
         }
 
@@ -91,6 +98,42 @@
             }
         }
 
+        public RoundedDouble UpperLevel
+        {
+            get
+            {
+                return upperLevel;
+            }
+            set
+            {
+                upperLevel = value.ToPrecision(upperLevel.NumberOfDecimalPlaces);
+            }
+        }
+
+        public RoundedDouble LowerLevel
+        {
+            get
+            {
+                return lowerLevel;
+            }
+            set
+            {
+                lowerLevel = value.ToPrecision(lowerLevel.NumberOfDecimalPlaces);
+            }
+        }
+
+        public RoundedDouble StepSize
+        {
+            get
+            {
+                return stepSize;
+            }
+            set
+            {
+                stepSize = value.ToPrecision(stepSize.NumberOfDecimalPlaces);
+            }
+        }
+
         private void UpdateProfileParameters()
         {
             if (dikeProfile == null)
Index: Ringtoets/Revetment/test/Ringtoets.Revetment.Data.Test/WaveConditionsInputTest.cs
===================================================================
diff -u -r48e1ce89dde79fee454de1157cf61b1c5525506a -rf37230ff653580eb90dd878e6ecc4f15511a11d6
--- Ringtoets/Revetment/test/Ringtoets.Revetment.Data.Test/WaveConditionsInputTest.cs	(.../WaveConditionsInputTest.cs)	(revision 48e1ce89dde79fee454de1157cf61b1c5525506a)
+++ Ringtoets/Revetment/test/Ringtoets.Revetment.Data.Test/WaveConditionsInputTest.cs	(.../WaveConditionsInputTest.cs)	(revision f37230ff653580eb90dd878e6ecc4f15511a11d6)
@@ -45,6 +45,9 @@
             Assert.AreEqual(new RoundedDouble(2), input.BreakWater.Height);
             Assert.IsFalse(input.UseForeshore);
             CollectionAssert.IsEmpty(input.ForeshoreGeometry);
+            Assert.AreEqual(new RoundedDouble(2), input.UpperLevel);
+            Assert.AreEqual(new RoundedDouble(2), input.LowerLevel);
+            Assert.AreEqual(new RoundedDouble(1), input.StepSize);
 		}
 
         [Test]
@@ -107,7 +110,6 @@
         }
 
         [Test]
-        [Combinatorial]
         public void DikeProfile_SetNullValue_InputSyncedToDefaults()
         {
             // Setup
@@ -154,5 +156,53 @@
             CollectionAssert.IsEmpty(input.ForeshoreGeometry);
             Assert.AreEqual(originalHydraulicBoundaryLocation, input.HydraulicBoundaryLocation);
         }
+
+        [Test]
+        public void UpperLevel_SetNewValue_ValueIsRounded()
+        {
+            // Setup
+            var input = new WaveConditionsInput();
+
+            int originalNumberOfDecimalPlaces = input.UpperLevel.NumberOfDecimalPlaces;
+
+            // Call
+            input.UpperLevel = new RoundedDouble(5, 1.23456);
+
+            // Assert
+            Assert.AreEqual(originalNumberOfDecimalPlaces, input.UpperLevel.NumberOfDecimalPlaces);
+            Assert.AreEqual(1.23, input.UpperLevel.Value);
+        }
+
+        [Test]
+        public void LowerLevel_SetNewValue_ValueIsRounded()
+        {
+            // Setup
+            var input = new WaveConditionsInput();
+
+            int originalNumberOfDecimalPlaces = input.LowerLevel.NumberOfDecimalPlaces;
+
+            // Call
+            input.LowerLevel = new RoundedDouble(5, 1.23456);
+
+            // Assert
+            Assert.AreEqual(originalNumberOfDecimalPlaces, input.LowerLevel.NumberOfDecimalPlaces);
+            Assert.AreEqual(1.23, input.LowerLevel.Value);
+        }
+
+        [Test]
+        public void StepSize_SetNewValue_ValueIsRounded()
+        {
+            // Setup
+            var input = new WaveConditionsInput();
+
+            int originalNumberOfDecimalPlaces = input.StepSize.NumberOfDecimalPlaces;
+
+            // Call
+            input.StepSize = new RoundedDouble(5, 1.23456);
+
+            // Assert
+            Assert.AreEqual(originalNumberOfDecimalPlaces, input.StepSize.NumberOfDecimalPlaces);
+            Assert.AreEqual(1.2, input.StepSize.Value);
+        }
     }
 }
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