Index: Core/Common/test/Core.Common.Utils.Test/Extensions/EnumerableExtensionsTest.cs
===================================================================
diff -u -rec84445b6e1b637f216885ccff122821eac68a94 -r6ec54db28a95fcbcd1617ec742a354dafc09b59c
--- Core/Common/test/Core.Common.Utils.Test/Extensions/EnumerableExtensionsTest.cs	(.../EnumerableExtensionsTest.cs)	(revision ec84445b6e1b637f216885ccff122821eac68a94)
+++ Core/Common/test/Core.Common.Utils.Test/Extensions/EnumerableExtensionsTest.cs	(.../EnumerableExtensionsTest.cs)	(revision 6ec54db28a95fcbcd1617ec742a354dafc09b59c)
@@ -108,11 +108,40 @@
         }
 
         [Test]
-        public void HasDuplicates_WithUniqueItems_ReturnsFalse()
+        public void HasDuplicates_WithoutItems_ReturnsFalse()
         {
             // Setup
+            var items = new List<int>();
+
+            // Call
+            bool hasDuplicates = items.HasDuplicates(t => t);
+
+            // Assert
+            Assert.IsFalse(hasDuplicates);
+        }
+
+        [Test]
+        public void HasDuplicates_WithSingleItem_ReturnsFalse()
+        {
+            // Setup
             var items = new List<int>
             {
+                1
+            };
+
+            // Call
+            bool hasDuplicates = items.HasDuplicates(t => t);
+
+            // Assert
+            Assert.IsFalse(hasDuplicates);
+        }
+
+        [Test]
+        public void HasDuplicates_WithMultipleItemsAllUnique_ReturnsFalse()
+        {
+            // Setup
+            var items = new List<int>
+            {
                 1,
                 2,
                 3
@@ -126,7 +155,7 @@
         }
 
         [Test]
-        public void HasDuplicates_WithDuplicateItems_ReturnsTrue()
+        public void HasDuplicates_WithMultipleItemsContainingSingleDuplicate_ReturnsTrue()
         {
             // Setup
             var items = new List<int>
@@ -172,9 +201,22 @@
         }
 
         [Test]
-        public void HasMultipleUniqueValues_WithSingleUniqueItem_ReturnsFalse()
+        public void HasMultipleUniqueValues_WithoutItems_ReturnsFalse()
         {
             // Setup
+            var items = new List<int>();
+
+            // Call
+            bool hasMultipleUniqueValues = items.HasMultipleUniqueValues(t => t);
+
+            // Assert
+            Assert.IsFalse(hasMultipleUniqueValues);
+        }
+
+        [Test]
+        public void HasMultipleUniqueValues_WithSingleItem_ReturnsFalse()
+        {
+            // Setup
             var items = new List<int>
             {
                 1
@@ -188,7 +230,7 @@
         }
 
         [Test]
-        public void HasMultipleUniqueValues_WithMultipleItemsOneUnique_ReturnsFalse()
+        public void HasMultipleUniqueValues_WithMultipleItemsAllDuplicate_ReturnsFalse()
         {
             // Setup
             var items = new List<int>
@@ -199,29 +241,28 @@
             };
 
             // Call
-            bool hasNonDistinct = items.HasMultipleUniqueValues(t => t);
+            bool hasMultipleUniqueValues = items.HasMultipleUniqueValues(t => t);
 
             // Assert
-            Assert.IsFalse(hasNonDistinct);
+            Assert.IsFalse(hasMultipleUniqueValues);
         }
 
         [Test]
-        public void HasMultipleUniqueValues_WithMultipleUniqueItems_ReturnsTrue()
+        public void HasMultipleUniqueValues_WithMultipleItemsContainingSingleNonDuplicate_ReturnsTrue()
         {
             // Setup
             var items = new List<int>
             {
                 1,
                 2,
-                2,
-                3
+                2
             };
 
             // Call
-            bool hasNonDistinct = items.HasMultipleUniqueValues(t => t);
+            bool hasMultipleUniqueValues = items.HasMultipleUniqueValues(t => t);
 
             // Assert
-            Assert.IsTrue(hasNonDistinct);
+            Assert.IsTrue(hasMultipleUniqueValues);
         }
     }
 }
\ No newline at end of file
Index: Ringtoets/Common/test/Ringtoets.Common.Forms.Test/Factories/RingtoetsStackChartDataFactoryTest.cs
===================================================================
diff -u -rda57945a7b1346cbd6cedb57477e4329d75b02c8 -r6ec54db28a95fcbcd1617ec742a354dafc09b59c
--- Ringtoets/Common/test/Ringtoets.Common.Forms.Test/Factories/RingtoetsStackChartDataFactoryTest.cs	(.../RingtoetsStackChartDataFactoryTest.cs)	(revision da57945a7b1346cbd6cedb57477e4329d75b02c8)
+++ Ringtoets/Common/test/Ringtoets.Common.Forms.Test/Factories/RingtoetsStackChartDataFactoryTest.cs	(.../RingtoetsStackChartDataFactoryTest.cs)	(revision 6ec54db28a95fcbcd1617ec742a354dafc09b59c)
@@ -108,7 +108,7 @@
         }
 
         [Test]
-        public void CreateColumns_SingleClosingSituationsSingleIllustrationPoint_ColumnsAddedToStackChartData()
+        public void CreateColumns_SingleClosingSituationSingleIllustrationPoint_ColumnsAddedToStackChartData()
         {
             // Setup
             var stackChartData = new StackChartData();
Index: Ringtoets/Common/test/Ringtoets.Common.Forms.Test/Views/GeneralResultFaultTreeIllustrationPointViewTest.cs
===================================================================
diff -u -r68ad4c0477e2ae7f325fef005b88d5be5c563840 -r6ec54db28a95fcbcd1617ec742a354dafc09b59c
--- Ringtoets/Common/test/Ringtoets.Common.Forms.Test/Views/GeneralResultFaultTreeIllustrationPointViewTest.cs	(.../GeneralResultFaultTreeIllustrationPointViewTest.cs)	(revision 68ad4c0477e2ae7f325fef005b88d5be5c563840)
+++ Ringtoets/Common/test/Ringtoets.Common.Forms.Test/Views/GeneralResultFaultTreeIllustrationPointViewTest.cs	(.../GeneralResultFaultTreeIllustrationPointViewTest.cs)	(revision 6ec54db28a95fcbcd1617ec742a354dafc09b59c)
@@ -282,7 +282,7 @@
                                                                          });
         }
 
-        private static GeneralResult<TopLevelFaultTreeIllustrationPoint> GetGeneralResultWithTwoTopLevelIllustrationPointsWithChildren(bool sameClosingSituations)
+        private static GeneralResult<TopLevelFaultTreeIllustrationPoint> GetGeneralResultWithThreeTopLevelIllustrationPointsWithChildren(bool sameClosingSituations)
         {
             var faultTreeNodeRootWithChildren = new IllustrationPointNode(new TestFaultTreeIllustrationPoint());
             faultTreeNodeRootWithChildren.SetChildren(new[]
@@ -303,13 +303,20 @@
                     sameClosingSituations ? "same closing situation" : "second closing situation",
                     new IllustrationPointNode(new TestSubMechanismIllustrationPoint()));
 
+            var topLevelFaultTreeIllustrationPoint3 =
+                new TopLevelFaultTreeIllustrationPoint(
+                    new WindDirection("Wind direction 3", 3.0),
+                    sameClosingSituations ? "same closing situation" : "second closing situation",
+                    new IllustrationPointNode(new TestSubMechanismIllustrationPoint()));
+
             var generalResultFunc = new GeneralResult<TopLevelFaultTreeIllustrationPoint>(
                 WindDirectionTestFactory.CreateTestWindDirection(),
                 Enumerable.Empty<Stochast>(),
                 new[]
                 {
                     topLevelFaultTreeIllustrationPoint1,
-                    topLevelFaultTreeIllustrationPoint2
+                    topLevelFaultTreeIllustrationPoint2,
+                    topLevelFaultTreeIllustrationPoint3
                 });
             return generalResultFunc;
         }
@@ -472,7 +479,7 @@
 
             mocks.ReplayAll();
 
-            GeneralResult<TopLevelFaultTreeIllustrationPoint> generalResultFunc = GetGeneralResultWithTwoTopLevelIllustrationPointsWithChildren(sameClosingSituations);
+            GeneralResult<TopLevelFaultTreeIllustrationPoint> generalResultFunc = GetGeneralResultWithThreeTopLevelIllustrationPointsWithChildren(sameClosingSituations);
             using (var view = new GeneralResultFaultTreeIllustrationPointView(() => generalResultFunc)
             {
                 Data = data
@@ -520,7 +527,7 @@
 
             mocks.ReplayAll();
 
-            GeneralResult<TopLevelFaultTreeIllustrationPoint> generalResultFunc = GetGeneralResultWithTwoTopLevelIllustrationPointsWithChildren(sameClosingSituations);
+            GeneralResult<TopLevelFaultTreeIllustrationPoint> generalResultFunc = GetGeneralResultWithThreeTopLevelIllustrationPointsWithChildren(sameClosingSituations);
             using (var view = new GeneralResultFaultTreeIllustrationPointView(() => generalResultFunc)
             {
                 Data = data