Index: Ringtoets/Piping/test/Ringtoets.Piping.Primitives.Test/PipingSoilLayerTest.cs
===================================================================
diff -u -r5edeb0ef7899f4554c0c06d0e3f3b8269666e65e -rd502e52f215cfeb0b08dcc3289e5fbf1a6bce625
--- Ringtoets/Piping/test/Ringtoets.Piping.Primitives.Test/PipingSoilLayerTest.cs	(.../PipingSoilLayerTest.cs)	(revision 5edeb0ef7899f4554c0c06d0e3f3b8269666e65e)
+++ Ringtoets/Piping/test/Ringtoets.Piping.Primitives.Test/PipingSoilLayerTest.cs	(.../PipingSoilLayerTest.cs)	(revision d502e52f215cfeb0b08dcc3289e5fbf1a6bce625)
@@ -101,15 +101,15 @@
 
             protected override TestLayer CreateDerivedObject()
             {
-                PipingSoilLayer baseLayer = CreateRandomLayer(21);
+                PipingSoilLayer baseLayer = CreateRandomLayer(seed);
                 return new TestLayer(baseLayer);
             }
 
             private static IEnumerable<TestCaseData> GetUnequalTestCases()
             {
                 PipingSoilLayer baseLayer = CreateRandomLayer(seed);
 
-                var random = new Random(21);
+                var random = new Random(seed);
                 double offset = random.NextDouble();
 
                 yield return new TestCaseData(new PipingSoilLayer(double.NaN)