Index: Ringtoets/Piping/test/Ringtoets.Piping.IO.Test/Builders/SoilProfileBuilder1DTest.cs
===================================================================
diff -u -rd2b5b334c49948fa49297a1d24c13bc98aa6ee1e -rdc2b06cb5a46cf2508d28fe9a6f8dcaa710346a7
--- Ringtoets/Piping/test/Ringtoets.Piping.IO.Test/Builders/SoilProfileBuilder1DTest.cs	(.../SoilProfileBuilder1DTest.cs)	(revision d2b5b334c49948fa49297a1d24c13bc98aa6ee1e)
+++ Ringtoets/Piping/test/Ringtoets.Piping.IO.Test/Builders/SoilProfileBuilder1DTest.cs	(.../SoilProfileBuilder1DTest.cs)	(revision dc2b06cb5a46cf2508d28fe9a6f8dcaa710346a7)
@@ -53,8 +53,8 @@
             var profileName = "SomeProfile";
             var random = new Random(22);
             var bottom = random.NextDouble();
-            var top = random.NextDouble();
-            var top2 = random.NextDouble();
+            var top = bottom + random.NextDouble();
+            var top2 = bottom + random.NextDouble();
 
             var builder = new SoilProfileBuilder1D(profileName, bottom);
             builder.Add(new PipingSoilLayer(top)