Index: Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Plugin.Test/TreeNodeInfos/GrassCoverErosionInwardsOutputContextTreeNodeInfoTest.cs
===================================================================
diff -u -r711f6909f672eff30cea67489cb7372f01e7aff9 -re36e88b2cfbec3549a4b9e708b9c6d111a06ecb2
--- Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Plugin.Test/TreeNodeInfos/GrassCoverErosionInwardsOutputContextTreeNodeInfoTest.cs	(.../GrassCoverErosionInwardsOutputContextTreeNodeInfoTest.cs)	(revision 711f6909f672eff30cea67489cb7372f01e7aff9)
+++ Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Plugin.Test/TreeNodeInfos/GrassCoverErosionInwardsOutputContextTreeNodeInfoTest.cs	(.../GrassCoverErosionInwardsOutputContextTreeNodeInfoTest.cs)	(revision e36e88b2cfbec3549a4b9e708b9c6d111a06ecb2)
@@ -112,6 +112,7 @@
         [Test]
         public void ChildNodeObjects_Always_ReturnCollectionWithOutputObject()
         {
+            // Setup
             var assessmentSection = mocksRepository.Stub<IAssessmentSection>();
             mocksRepository.ReplayAll();
 
@@ -131,5 +132,31 @@
             var resultOutput = children[0] as GrassCoverErosionInwardsOvertoppingOutput;
             Assert.AreSame(context.WrappedData.OvertoppingOutput, resultOutput);
         }
+
+        [Test]
+        public void ChildNodeObjects_HBNNotCalculated_ReturnCollectionWithOutputObjects()
+        {
+            // Setup
+            var assessmentSection = mocksRepository.Stub<IAssessmentSection>();
+            mocksRepository.ReplayAll();
+
+            var output = new GrassCoverErosionInwardsOutput(new GrassCoverErosionInwardsOvertoppingOutput(
+                                                                0, true, new ProbabilityAssessmentOutput(0, 0, 0, 0, 0)),
+                                                            null,
+                                                            new TestOvertoppingRateOutput(0));
+
+            var context = new GrassCoverErosionInwardsOutputContext(output, new GrassCoverErosionInwardsFailureMechanism(), assessmentSection);
+
+            // Call
+            object[] children = info.ChildNodeObjects(context).ToArray();
+
+            // Assert
+            Assert.AreEqual(2, children.Length);
+
+            var resultOutput = children[0] as GrassCoverErosionInwardsOvertoppingOutput;
+            Assert.AreSame(context.WrappedData.OvertoppingOutput, resultOutput);
+
+            Assert.IsInstanceOf<EmptyDikeHeightOutput>(children[1]);
+        }
     }
 }
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