Index: Ringtoets/HydraRing/test/Ringtoets.HydraRing.Calculation.Test/Data/Input/TargetProbabilityCalculationInputTest.cs
===================================================================
diff -u -r4ba68ad8c0ed15ce0449c39a5c6df1ef53daf866 -rab59b0648bcae3ff70932998fbfa1a266558b8e6
--- Ringtoets/HydraRing/test/Ringtoets.HydraRing.Calculation.Test/Data/Input/TargetProbabilityCalculationInputTest.cs	(.../TargetProbabilityCalculationInputTest.cs)	(revision 4ba68ad8c0ed15ce0449c39a5c6df1ef53daf866)
+++ Ringtoets/HydraRing/test/Ringtoets.HydraRing.Calculation.Test/Data/Input/TargetProbabilityCalculationInputTest.cs	(.../TargetProbabilityCalculationInputTest.cs)	(revision ab59b0648bcae3ff70932998fbfa1a266558b8e6)
@@ -20,6 +20,7 @@
 // All rights reserved.
 
 using System;
+using Core.Common.Utils;
 using MathNet.Numerics.Distributions;
 using NUnit.Framework;
 using Ringtoets.HydraRing.Calculation.Data;
@@ -38,10 +39,10 @@
         public void Constructed_UsingDifferentNormAndLocationId_ReturnDifferentBetaAndDefaultValues(int locationId, double norm)
         {
             // Call
-            var expectedBeta = -Normal.InvCDF(0.0, 1.0, 1.0/norm);
             var targetProbabilityCalculationInputImplementation = new SimpleTargetProbabilityCalculationInput(locationId, norm);
 
             // Assert
+            double expectedBeta = StatisticsConverter.NormToBeta(norm);
             Assert.AreEqual(locationId, targetProbabilityCalculationInputImplementation.HydraulicBoundaryLocationId);
             Assert.AreEqual(2, targetProbabilityCalculationInputImplementation.CalculationTypeId);
             CollectionAssert.IsEmpty(targetProbabilityCalculationInputImplementation.Variables);