diff --git a/src/py/mat3ra/mode/methods/pseudopotential.py b/src/py/mat3ra/mode/methods/pseudopotential.py
index e0d5a27..ffb6031 100644
--- a/src/py/mat3ra/mode/methods/pseudopotential.py
+++ b/src/py/mat3ra/mode/methods/pseudopotential.py
@@ -2,10 +2,11 @@
 
 from mat3ra.esse.models.methods_directory.legacy.pseudopotential import LegacyMethodPseudopotential
 
-from ..method import Method
+from ..method import Method, MethodData
 
 
 class PseudopotentialMethod(LegacyMethodPseudopotential, Method):
+    data: MethodData = MethodData()
     pseudopotential_cls: Optional[type] = None
 
     @property
@@ -32,8 +33,6 @@ def to_dict(self, exclude: Optional[List[str]] = None) -> Dict[str, Any]:
         json_data = super().to_dict(exclude=exclude)
 
         if exclude is None or "data" not in exclude:
-            filtered_data = self.data.copy()
-            # filtered_data.pop("allPseudo", None)
-            json_data["data"] = filtered_data
+            json_data["data"] = self.data.to_dict(exclude={"allPseudo"})
 
         return json_data
diff --git a/tests/py/unit/test_pseudopotential_method.py b/tests/py/unit/test_pseudopotential_method.py
index 47b1185..8f46e43 100644
--- a/tests/py/unit/test_pseudopotential_method.py
+++ b/tests/py/unit/test_pseudopotential_method.py
@@ -40,13 +40,12 @@ def test_all_pseudo_property(config):
     assert isinstance(all_pseudo, list)
     assert len(all_pseudo) == 2
 
-@pytest.mark.skip(reason="TODO: fix this test")
 @pytest.mark.parametrize("config", TEST_CONFIGS)
 def test_to_dict_excludes_all_pseudo(config):
     config_with_data = {**config, "data": TEST_COMBINED_PSEUDO_DATA}
     method = PseudopotentialMethod.create(config_with_data)
 
-    json_data = method.model_dump()
+    json_data = method.to_dict()
     assert "allPseudo" not in json_data["data"]
     assert "pseudo" in json_data["data"]