Index: Riskeer/Revetment/test/Riskeer.Revetment.Data.Test/WaveConditionsInputHelperTest.cs
===================================================================
diff -u -r46f67cbfb21c6a0d524d242cddaadd5103c86151 -r617d32a3464bc84a25c83839b0701f5898300829
--- Riskeer/Revetment/test/Riskeer.Revetment.Data.Test/WaveConditionsInputHelperTest.cs	(.../WaveConditionsInputHelperTest.cs)	(revision 46f67cbfb21c6a0d524d242cddaadd5103c86151)
+++ Riskeer/Revetment/test/Riskeer.Revetment.Data.Test/WaveConditionsInputHelperTest.cs	(.../WaveConditionsInputHelperTest.cs)	(revision 617d32a3464bc84a25c83839b0701f5898300829)
@@ -20,13 +20,15 @@
 // All rights reserved.
 
 using System;
+using System.Collections.Generic;
 using System.ComponentModel;
 using Core.Common.Base.Data;
 using Core.Common.TestUtil;
 using NUnit.Framework;
 using Riskeer.Common.Data.AssessmentSection;
 using Riskeer.Common.Data.Contribution;
 using Riskeer.Common.Data.FailureMechanism;
+using Riskeer.Common.Data.Hydraulics;
 using Riskeer.Common.Data.TestUtil;
 using Riskeer.Revetment.Data.TestUtil;
 
@@ -187,6 +189,27 @@
         }
 
         [Test]
+        [TestCaseSource(nameof(GetTargetProbabilityConfigurations))]
+        public void GetTargetProbability_ValidInput_ReturnsExpectedValue(WaveConditionsInputWaterLevelType waterLevelType,
+                                                                         Func<WaveConditionsInput, IAssessmentSection, double> getExpectedTargetProbability)
+        {
+            // Setup
+            var input = new TestWaveConditionsInput
+            {
+                WaterLevelType = waterLevelType,
+                CalculationsTargetProbability = new HydraulicBoundaryLocationCalculationsForTargetProbability(0.01)
+            };
+
+            var assessmentSection = new AssessmentSectionStub();
+
+            // Call
+            double targetProbability = WaveConditionsInputHelper.GetTargetProbability(input, assessmentSection);
+
+            // Assert
+            Assert.AreEqual(getExpectedTargetProbability(input, assessmentSection), targetProbability);
+        }
+
+        [Test]
         public void GetAssessmentLevel_InputNull_ThrowsArgumentNullException()
         {
             // Call
@@ -226,5 +249,21 @@
             var exception = TestHelper.AssertThrowsArgumentExceptionAndTestMessage<InvalidEnumArgumentException>(Call, expectedMessage);
             Assert.AreEqual("WaterLevelType", exception.ParamName);
         }
+
+        private static IEnumerable<TestCaseData> GetTargetProbabilityConfigurations()
+        {
+            yield return new TestCaseData(
+                WaveConditionsInputWaterLevelType.None,
+                (Func<WaveConditionsInput, IAssessmentSection, double>) ((input, assessmentSection) => double.NaN));
+            yield return new TestCaseData(
+                WaveConditionsInputWaterLevelType.LowerLimit,
+                (Func<WaveConditionsInput, IAssessmentSection, double>) ((input, assessmentSection) => assessmentSection.FailureMechanismContribution.LowerLimitNorm));
+            yield return new TestCaseData(
+                WaveConditionsInputWaterLevelType.Signaling,
+                (Func<WaveConditionsInput, IAssessmentSection, double>) ((input, assessmentSection) => assessmentSection.FailureMechanismContribution.SignalingNorm));
+            yield return new TestCaseData(
+                WaveConditionsInputWaterLevelType.UserDefinedTargetProbability,
+                (Func<WaveConditionsInput, IAssessmentSection, double>) ((input, assessmentSection) => input.CalculationsTargetProbability.TargetProbability));
+        }
     }
 }
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