Index: Ringtoets/Piping/test/Ringtoets.Piping.Service.Test/PipingCalculationServiceTest.cs
===================================================================
diff -u -r41a37c93cb0b3e36ff7023c9f42b4e6225598b55 -r03a0bbc245b8da50ca603f18d5b9b8fb2d7593c5
--- Ringtoets/Piping/test/Ringtoets.Piping.Service.Test/PipingCalculationServiceTest.cs	(.../PipingCalculationServiceTest.cs)	(revision 41a37c93cb0b3e36ff7023c9f42b4e6225598b55)
+++ Ringtoets/Piping/test/Ringtoets.Piping.Service.Test/PipingCalculationServiceTest.cs	(.../PipingCalculationServiceTest.cs)	(revision 03a0bbc245b8da50ca603f18d5b9b8fb2d7593c5)
@@ -426,9 +426,9 @@
                                                     new PipingSoilLayer(10.5)
                                                     {
                                                         IsAquifer = false,
-                                                        BelowPhreaticLevelDeviation = GetRandomDoubleFromRange(random, 1e-6, 999.999),
-                                                        BelowPhreaticLevelMean = GetRandomDoubleFromRange(random, 10.0, 999.999),
-                                                        BelowPhreaticLevelShift = GetRandomDoubleFromRange(random, 1e-6, 10.0)
+                                                        BelowPhreaticLevelDeviation = RandomNumberGenerator.GetRandomDoubleFromRange(random, 1e-6, 999.999),
+                                                        BelowPhreaticLevelMean = RandomNumberGenerator.GetRandomDoubleFromRange(random, 10.0, 999.999),
+                                                        BelowPhreaticLevelShift = RandomNumberGenerator.GetRandomDoubleFromRange(random, 1e-6, 10.0)
                                                     },
                                                     incompletePipingSoilLayer
                                                 },
@@ -486,9 +486,9 @@
                                                     new PipingSoilLayer(10.5)
                                                     {
                                                         IsAquifer = false,
-                                                        BelowPhreaticLevelDeviation = GetRandomDoubleFromRange(random, 1e-6, 999.999),
-                                                        BelowPhreaticLevelMean = GetRandomDoubleFromRange(random, 10.0, 999.999),
-                                                        BelowPhreaticLevelShift = GetRandomDoubleFromRange(random, 1e-6, 10.0)
+                                                        BelowPhreaticLevelDeviation = RandomNumberGenerator.GetRandomDoubleFromRange(random, 1e-6, 999.999),
+                                                        BelowPhreaticLevelMean = RandomNumberGenerator.GetRandomDoubleFromRange(random, 10.0, 999.999),
+                                                        BelowPhreaticLevelShift = RandomNumberGenerator.GetRandomDoubleFromRange(random, 1e-6, 10.0)
                                                     },
                                                     incompletePipingSoilLayer
                                                 },
@@ -806,11 +806,5 @@
             Assert.AreEqual(input.SandParticlesVolumicWeight, sellmeijerCalculator.GammaSubParticles);
             Assert.AreEqual(input.Gravity, sellmeijerCalculator.Gravity);
         }
-
-        private double GetRandomDoubleFromRange(Random random, double lowerLimit, double upperLimit)
-        {
-            double difference = upperLimit - lowerLimit;
-            return lowerLimit + random.NextDouble()*difference;
-        }
     }
 }
\ No newline at end of file