Index: Ringtoets/AssemblyTool/test/Ringtoets.AssemblyTool.KernelWrapper.TestUtil/Kernels/AssemblyToolKernelFactoryConfig.cs
===================================================================
diff -u -raf2dccd51c7d3ece1434603ea37e8f75cdbb54a2 -r94f14096f9a5565b9f961c7b7e1822ef0976a42a
--- Ringtoets/AssemblyTool/test/Ringtoets.AssemblyTool.KernelWrapper.TestUtil/Kernels/AssemblyToolKernelFactoryConfig.cs	(.../AssemblyToolKernelFactoryConfig.cs)	(revision af2dccd51c7d3ece1434603ea37e8f75cdbb54a2)
+++ Ringtoets/AssemblyTool/test/Ringtoets.AssemblyTool.KernelWrapper.TestUtil/Kernels/AssemblyToolKernelFactoryConfig.cs	(.../AssemblyToolKernelFactoryConfig.cs)	(revision 94f14096f9a5565b9f961c7b7e1822ef0976a42a)
@@ -55,13 +55,22 @@
             AssemblyToolKernelFactory.Instance = new TestAssemblyToolKernelFactory();
         }
 
+        public void Dispose()
+        {
+            Dispose(true);
+            GC.SuppressFinalize(this);
+        }
+
         /// <summary>
         /// Reverts the <see cref="AssemblyToolKernelFactory.Instance"/> to the value
         /// it had at time of construction of the <see cref="AssemblyToolKernelFactoryConfig"/>.
         /// </summary>
-        public void Dispose()
+        protected virtual void Dispose(bool disposing)
         {
-            AssemblyToolKernelFactory.Instance = previousFactory;
+            if (disposing)
+            {
+                AssemblyToolKernelFactory.Instance = previousFactory;
+            }
         }
     }
 }
\ No newline at end of file