diff --git a/tests/test_dem_model_structure.py b/tests/test_dem_model_structure.py
index 2ecf076..0555528 100644
--- a/tests/test_dem_model_structure.py
+++ b/tests/test_dem_model_structure.py
@@ -201,7 +201,10 @@ def model_generator(structure):
                     for i in range(len(model.variables)):
                         var = model.variables[i]
                         if isinstance(var, PopulationSizeVariable):
-                            model.variables[i].domain = [1e-1, 5.]
+                            if var.name == "Nanc":
+                                model.variables[i].domain = [1000, 2000]
+                            else:
+                                model.variables[i].domain = [1e-1, 5.]
                         elif isinstance(var, TimeVariable):
                             model.variables[i].domain = [0.1, 1.]
                         elif isinstance(var, MigrationVariable):
@@ -236,7 +239,7 @@ def model_generator(structure):
                         sizes = [8 for _ in range(len(structure))]
                         if len(structure) == 1:
                             sizes = [20]
-                        kwargs = {"pts": [10, 12, 14]}  # pts
+                        kwargs = {"pts": [8, 10, 12]}  # pts
                     else:
                         sizes = [4 for _ in range(len(structure))]
                         kwargs = {}
@@ -306,15 +309,17 @@ def model_generator(structure):
                                 self.assertTrue(is_equal,
                                                 msg=f"{ll_true} != {new_ll} : {msg}")
                             except AttributeError as e:
-                                assert engine.id in ["dadi"], str(e)
+                                print(e)
+                                assert engine.id in ["dadi"]
                                 failed += 1
                             except TypeError as e:
-                                assert engine.id in ["dadi"], str(e)
+                                print(e)
+                                assert engine.id in ["dadi"]
                                 failed += 1
 
                 dm.final_structure = dm.get_structure()
                 self.assertRaises(ValueError, dm.increase_structure)
-        self.assertTrue(failed <= 5, "Dadi failed more that 5 times")
+        self.assertTrue(failed <= 5, "Dadi and momi2 failed more that 5 times")
 
     def _data_for_ll_ld_test(self, ii):
         return VCFDataHolder(