Index: Ringtoets/Common/src/Ringtoets.Common.Forms/Views/FailureMechanismResultView.cs
===================================================================
diff -u -r2f63c812bb240ed18c030efb1be331f06f74270f -r0078247e1ebbfa5d7c4a89795778ecd995611dd5
--- Ringtoets/Common/src/Ringtoets.Common.Forms/Views/FailureMechanismResultView.cs	(.../FailureMechanismResultView.cs)	(revision 2f63c812bb240ed18c030efb1be331f06f74270f)
+++ Ringtoets/Common/src/Ringtoets.Common.Forms/Views/FailureMechanismResultView.cs	(.../FailureMechanismResultView.cs)	(revision 0078247e1ebbfa5d7c4a89795778ecd995611dd5)
@@ -21,14 +21,12 @@
 
 using System;
 using System.Collections.Generic;
-using System.ComponentModel;
 using System.Linq;
 using System.Windows.Forms;
 using Core.Common.Base;
 using Core.Common.Controls.DataGrid;
 using Core.Common.Controls.Views;
 using Core.Common.Util.Extensions;
-using Ringtoets.AssemblyTool.Data;
 using Ringtoets.Common.Data.Exceptions;
 using Ringtoets.Common.Data.FailureMechanism;
 using Ringtoets.Common.Forms.Controls;
Index: Ringtoets/Common/test/Ringtoets.Common.Forms.TestUtil/FailureMechanismAssemblyCategoryGroupControlTestFixture.cs
===================================================================
diff -u -ree93ac5bb6cb37107dfbef6ea72287cf67f83cc0 -r0078247e1ebbfa5d7c4a89795778ecd995611dd5
--- Ringtoets/Common/test/Ringtoets.Common.Forms.TestUtil/FailureMechanismAssemblyCategoryGroupControlTestFixture.cs	(.../FailureMechanismAssemblyCategoryGroupControlTestFixture.cs)	(revision ee93ac5bb6cb37107dfbef6ea72287cf67f83cc0)
+++ Ringtoets/Common/test/Ringtoets.Common.Forms.TestUtil/FailureMechanismAssemblyCategoryGroupControlTestFixture.cs	(.../FailureMechanismAssemblyCategoryGroupControlTestFixture.cs)	(revision 0078247e1ebbfa5d7c4a89795778ecd995611dd5)
@@ -140,25 +140,25 @@
             var failureMechanism = new TFailureMechanism();
 
             using (new AssemblyToolCalculatorFactoryConfig())
-            using (ShowFailureMechanismResultsView(failureMechanism))
             {
-                var calculatorfactory = (TestAssemblyToolCalculatorFactory) AssemblyToolCalculatorFactory.Instance;
+                var calculatorfactory = (TestAssemblyToolCalculatorFactory)AssemblyToolCalculatorFactory.Instance;
                 FailureMechanismAssemblyCalculatorStub calculator = calculatorfactory.LastCreatedFailureMechanismAssemblyCalculator;
-
                 calculator.ThrowExceptionOnCalculate = true;
-                failureMechanism.NotifyObservers();
 
-                // Precondition
-                FailureMechanismAssemblyCategoryGroupControl assemblyControl = GetFailureMechanismAssemblyCategoryGroupControl();
-                ErrorProvider errorProvider = GetErrorProvider(assemblyControl);
-                Assert.AreEqual("Message", errorProvider.GetError(assemblyControl));
+                using (ShowFailureMechanismResultsView(failureMechanism))
+                {
+                    // Precondition
+                    FailureMechanismAssemblyCategoryGroupControl assemblyControl = GetFailureMechanismAssemblyCategoryGroupControl();
+                    ErrorProvider errorProvider = GetErrorProvider(assemblyControl);
+                    Assert.AreEqual("Message", errorProvider.GetError(assemblyControl));
 
-                // When
-                calculator.ThrowExceptionOnCalculate = false;
-                failureMechanism.NotifyObservers();
+                    // When
+                    calculator.ThrowExceptionOnCalculate = false;
+                    failureMechanism.NotifyObservers();
 
-                // Then
-                Assert.IsEmpty(errorProvider.GetError(assemblyControl));
+                    // Then
+                    Assert.IsEmpty(errorProvider.GetError(assemblyControl));
+                }
             }
         }
 
Index: Ringtoets/Common/test/Ringtoets.Common.Forms.TestUtil/FailureMechanismAssemblyResultWithProbabilityControlTestFixture.cs
===================================================================
diff -u -ree93ac5bb6cb37107dfbef6ea72287cf67f83cc0 -r0078247e1ebbfa5d7c4a89795778ecd995611dd5
--- Ringtoets/Common/test/Ringtoets.Common.Forms.TestUtil/FailureMechanismAssemblyResultWithProbabilityControlTestFixture.cs	(.../FailureMechanismAssemblyResultWithProbabilityControlTestFixture.cs)	(revision ee93ac5bb6cb37107dfbef6ea72287cf67f83cc0)
+++ Ringtoets/Common/test/Ringtoets.Common.Forms.TestUtil/FailureMechanismAssemblyResultWithProbabilityControlTestFixture.cs	(.../FailureMechanismAssemblyResultWithProbabilityControlTestFixture.cs)	(revision 0078247e1ebbfa5d7c4a89795778ecd995611dd5)
@@ -148,25 +148,25 @@
             var failureMechanism = new TFailureMechanism();
 
             using (new AssemblyToolCalculatorFactoryConfig())
-            using (ShowFailureMechanismResultsView(failureMechanism))
             {
-                var calculatorfactory = (TestAssemblyToolCalculatorFactory) AssemblyToolCalculatorFactory.Instance;
+                var calculatorfactory = (TestAssemblyToolCalculatorFactory)AssemblyToolCalculatorFactory.Instance;
                 FailureMechanismAssemblyCalculatorStub calculator = calculatorfactory.LastCreatedFailureMechanismAssemblyCalculator;
-
                 calculator.ThrowExceptionOnCalculate = true;
-                failureMechanism.NotifyObservers();
 
-                // Precondition
-                FailureMechanismAssemblyControl assemblyControl = GetFailureMechanismAssemblyControl();
-                ErrorProvider errorProvider = GetErrorProvider(assemblyControl);
-                Assert.AreEqual("Message", errorProvider.GetError(assemblyControl));
+                using (ShowFailureMechanismResultsView(failureMechanism))
+                {
+                    // Precondition
+                    FailureMechanismAssemblyControl assemblyControl = GetFailureMechanismAssemblyControl();
+                    ErrorProvider errorProvider = GetErrorProvider(assemblyControl);
+                    Assert.AreEqual("Message", errorProvider.GetError(assemblyControl));
 
-                // When
-                calculator.ThrowExceptionOnCalculate = false;
-                failureMechanism.NotifyObservers();
+                    // When
+                    calculator.ThrowExceptionOnCalculate = false;
+                    failureMechanism.NotifyObservers();
 
-                // Then
-                Assert.IsEmpty(errorProvider.GetError(assemblyControl));
+                    // Then
+                    Assert.IsEmpty(errorProvider.GetError(assemblyControl));
+                }
             }
         }