Index: Ringtoets/HydraRing/test/Ringtoets.HydraRing.Calculation.Test/Data/Input/Hydraulics/AssessmentLevelCalculationInputTest.cs
===================================================================
diff -u -rd6042fd94b713810bdf59312d322e1dcc76dc586 -rff012303ef231b9e823e1c59f0829030962c8115
--- Ringtoets/HydraRing/test/Ringtoets.HydraRing.Calculation.Test/Data/Input/Hydraulics/AssessmentLevelCalculationInputTest.cs	(.../AssessmentLevelCalculationInputTest.cs)	(revision d6042fd94b713810bdf59312d322e1dcc76dc586)
+++ Ringtoets/HydraRing/test/Ringtoets.HydraRing.Calculation.Test/Data/Input/Hydraulics/AssessmentLevelCalculationInputTest.cs	(.../AssessmentLevelCalculationInputTest.cs)	(revision ff012303ef231b9e823e1c59f0829030962c8115)
@@ -20,7 +20,7 @@
 // All rights reserved.
 
 using System.Linq;
-using MathNet.Numerics.Distributions;
+using Core.Common.Utils;
 using NUnit.Framework;
 using Ringtoets.HydraRing.Calculation.Data;
 using Ringtoets.HydraRing.Calculation.Data.Input.Hydraulics;
@@ -37,12 +37,12 @@
             const int norm = 10000;
             const int sectionId = 1;
             const long hydraulicBoundaryLocationId = 1234;
-            var expectedBeta = -Normal.InvCDF(0.0, 1.0, 1.0/norm);
 
             // Call
             var assessmentLevelCalculationInput = new AssessmentLevelCalculationInput(sectionId, hydraulicBoundaryLocationId, norm);
 
             // Assert
+            double expectedBeta = StatisticsConverter.NormToBeta(norm);
             Assert.AreEqual(HydraRingFailureMechanismType.AssessmentLevel, assessmentLevelCalculationInput.FailureMechanismType);
             Assert.AreEqual(2, assessmentLevelCalculationInput.CalculationTypeId);
             Assert.AreEqual(26, assessmentLevelCalculationInput.VariableId);