diff --git a/caimira/apps/calculator/report_generator.py b/caimira/apps/calculator/report_generator.py
index 432cf286..885c2e8d 100644
--- a/caimira/apps/calculator/report_generator.py
+++ b/caimira/apps/calculator/report_generator.py
@@ -15,7 +15,7 @@ import matplotlib.pyplot as plt
 from caimira import models
 from caimira.apps.calculator import markdown_tools
 from ... import monte_carlo as mc
-from .model_generator import FormData, _DEFAULT_MC_SAMPLE_SIZE
+from .model_generator import FormData, DEFAULT_MC_SAMPLE_SIZE
 from ... import dataclass_utils
 
 
@@ -362,7 +362,7 @@ def manufacture_alternative_scenarios(form: FormData) -> typing.Dict[str, mc.Exp
 
 
 def scenario_statistics(mc_model: mc.ExposureModel, sample_times: typing.List[float], compute_prob_exposure: bool):
-    model = mc_model.build_model(size=_DEFAULT_MC_SAMPLE_SIZE)
+    model = mc_model.build_model(size=DEFAULT_MC_SAMPLE_SIZE)
     if (compute_prob_exposure):
         # It means we have data to calculate the total_probability_rule
         prob_probabilistic_exposure = model.total_probability_rule()
diff --git a/caimira/tests/apps/calculator/test_model_generator.py b/caimira/tests/apps/calculator/test_model_generator.py
index 787e7a8e..099a00d2 100644
--- a/caimira/tests/apps/calculator/test_model_generator.py
+++ b/caimira/tests/apps/calculator/test_model_generator.py
@@ -540,7 +540,7 @@ def test_default_types():
             # Handle typing.NewType definitions.
             field_type = field_type.__supertype__
 
-        if value is model_generator._NO_DEFAULT:
+        if value is model_generator.NO_DEFAULT:
             continue
 
         if field in model_generator._CAST_RULES_FORM_ARG_TO_NATIVE: