Automatically call a method after ExMachina's `insert()` has completed?

Is there a way to hook into ExMachina in order to perform an action post insert?

I have a scenario where in my unit test after performing two separate inserts, I repeatedly need to take an action on the two items as exemplified by this contrived example

 test "my test" do
      a = insert(:a)
      b = insert(:b, attribute: a)
      Logbooks.write_entry_for(a, b)

      assert ...

I would like to automate calling Logbooks.write_entry_for() whenever insert(:b, attribute: a) happens but calling it inside the definition of b_factory doesn’t work as b itself isn’t persisted at that point.

Does anyone know of a way to solve this?