Index: Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Forms.Test/Views/HeightStructuresFailureMechanismResultViewTest.cs
===================================================================
diff -u -rb28a844780b613e1901fa82328ba3917f485c729 -rb6e0f8d41d92ed18c902138dd49cce6e703ee883
--- Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Forms.Test/Views/HeightStructuresFailureMechanismResultViewTest.cs	(.../HeightStructuresFailureMechanismResultViewTest.cs)	(revision b28a844780b613e1901fa82328ba3917f485c729)
+++ Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Forms.Test/Views/HeightStructuresFailureMechanismResultViewTest.cs	(.../HeightStructuresFailureMechanismResultViewTest.cs)	(revision b6e0f8d41d92ed18c902138dd49cce6e703ee883)
@@ -243,11 +243,33 @@
         }
 
         [Test]
+        [SetCulture("nl-NL")]
+        [TestCase("1.01")]
+        [TestCase("-0.01")]
+        [TestCase("5")]
+        [TestCase("-10")]
+        public void FailureMechanismResultView_EditValueAssessmentLayerThreeInvalid_ShowErrorToolTip(string newValue)
+        {
+            // Setup
+            using (ShowFullyConfiguredFailureMechanismResultsView())
+            {
+                var dataGridView = (DataGridView)new ControlTester("dataGridView").TheObject;
+
+                // Call
+                dataGridView.Rows[0].Cells[assessmentLayerThreeIndex].Value = newValue;
+
+                // Assert
+                Assert.AreEqual("Kans moet in het bereik [0,0, 1,0] liggen.", dataGridView.Rows[0].ErrorText);
+            }
+        }
+
+        [Test]
         [TestCase("1")]
+        [TestCase("0")]
+        [TestCase("0.5")]
         [TestCase("1e-6")]
-        [TestCase("1e+6")]
-        [TestCase("14.3")]
-        public void FailureMechanismResultView_EditValueValid_DoNotShowErrorToolTipAndEditValue(string newValue)
+        [TestCase("NaN")]
+        public void FailureMechanismResultView_EditValueAssessmentLayerThreeValid_DoNotShowErrorToolTipAndEditValue(string newValue)
         {
             // Setup
             using (HeightStructuresFailureMechanismResultView view = ShowFullyConfiguredFailureMechanismResultsView())