Index: Application/Ringtoets/test/Application.Ringtoets.Storage.TestUtil/TestDbSet.cs
===================================================================
diff -u -re3f9dffa91a0def0b6e6bc7dfabef74cc64745c5 -rf62076c7d8b6a65856fbab6a1b34b4234aa319e5
--- Application/Ringtoets/test/Application.Ringtoets.Storage.TestUtil/TestDbSet.cs	(.../TestDbSet.cs)	(revision e3f9dffa91a0def0b6e6bc7dfabef74cc64745c5)
+++ Application/Ringtoets/test/Application.Ringtoets.Storage.TestUtil/TestDbSet.cs	(.../TestDbSet.cs)	(revision f62076c7d8b6a65856fbab6a1b34b4234aa319e5)
@@ -29,7 +29,7 @@
 
 namespace Application.Ringtoets.Storage.TestUtil
 {
-    public class TestDbSet<T> : DbSet<T>, IDbSet<T> where T : class
+    public sealed class TestDbSet<T> : DbSet<T>, IDbSet<T> where T : class
     {
         private readonly IQueryable<T> queryable;
         private readonly ObservableCollection<T> collection;