Index: Ringtoets/Piping/test/Ringtoets.Piping.IO.Test/Builders/SoilLayer1DTest.cs
===================================================================
diff -u -r49f905d3363336d44ef828259692644dcf5f9edc -r8ed108b83f575f6cb7dc1b89224606894a4bcb7a
--- Ringtoets/Piping/test/Ringtoets.Piping.IO.Test/Builders/SoilLayer1DTest.cs	(.../SoilLayer1DTest.cs)	(revision 49f905d3363336d44ef828259692644dcf5f9edc)
+++ Ringtoets/Piping/test/Ringtoets.Piping.IO.Test/Builders/SoilLayer1DTest.cs	(.../SoilLayer1DTest.cs)	(revision 8ed108b83f575f6cb7dc1b89224606894a4bcb7a)
@@ -65,5 +65,20 @@
             Assert.AreEqual(materialName, result.MaterialName);
             Assert.AreEqual(Color.FromArgb(color.ToArgb()), result.Color);
         }
+
+        [Test]
+        public void AsPipingSoilLayer_PropertiesSetWithNullMaterialName_MaterialNameEmptyInPipingSoilLayer()
+        {
+            // Setup
+            var random = new Random(22);
+            var top = random.NextDouble();
+            var layer = new SoilLayer1D(top);
+
+            // Call
+            var result = layer.AsPipingSoilLayer();
+
+            // Assert
+            Assert.IsEmpty(result.MaterialName);
+        }
     }
 }
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