Test NH826 fails on PostgreSQL

Unit test NHibernate.Test.NHSpecificTest.NH826.Fixture.Bug() fails on PostgreSQL and will fail on any database with sequence id generator.

This test create first an entity "activity" and then create an other one named "activitySet".
Those two entities are mapped in two distinct tables. With identity column there each get the value 1 as id, but with sequence the "activity" get id 1 and "activitySet" id 2.

Then, the test execute that query:
session.CreateCriteria(typeof(ActivitySet)).Add(Expression.Expression.Eq("Id", 1))

But it should get the id from the activitySet to avoid the previously explained difference:
session.CreateCriteria(typeof(ActivitySet)).Add(Expression.Expression.Eq("Id", activitySet.Id))