diff --git a/responsibleai/responsibleai/rai_insights/rai_base_insights.py b/responsibleai/responsibleai/rai_insights/rai_base_insights.py
index f108b41fe3..bb34ae05ab 100644
--- a/responsibleai/responsibleai/rai_insights/rai_base_insights.py
+++ b/responsibleai/responsibleai/rai_insights/rai_base_insights.py
@@ -29,7 +29,7 @@ class RAIBaseInsights(ABC):
     This class is abstract and should not be instantiated.
     """
 
-    def __init__(self, model: Optional[Any], train: pd.DataFrame,
+    def __init__(self, model: Optional[Any], train: Optional[pd.DataFrame],
                  test: pd.DataFrame, target_column: str, task_type: str,
                  serializer: Optional[Any] = None):
         """Creates an RAIBaseInsights object.
@@ -39,8 +39,11 @@ def __init__(self, model: Optional[Any], train: pd.DataFrame,
             or function that accepts a 2d ndarray.
         :type model: object
         :param train: The training dataset including the label column.
+            This parameter is optional as some extending downstream classes
+            may not require it.
         :type train: pandas.DataFrame
         :param test: The test dataset including the label column.
+            Note this parameter is always required.
         :type test: pandas.DataFrame
         :param target_column: The name of the label column.
         :type target_column: str
@@ -138,13 +141,14 @@ def _save_data(self, path):
         """
         data_directory = Path(path) / SerializationAttributes.DATA_DIRECTORY
         data_directory.mkdir(parents=True, exist_ok=True)
-        dtypes = self.train.dtypes.astype(str).to_dict()
-        self._write_to_file(data_directory /
-                            (Metadata.TRAIN + _DTYPES + FileFormats.JSON),
-                            json.dumps(dtypes))
-        self._write_to_file(data_directory /
-                            (Metadata.TRAIN + FileFormats.JSON),
-                            self.train.to_json(orient='split'))
+        if self.train is not None:
+            dtypes = self.train.dtypes.astype(str).to_dict()
+            self._write_to_file(data_directory /
+                                (Metadata.TRAIN + _DTYPES + FileFormats.JSON),
+                                json.dumps(dtypes))
+            self._write_to_file(data_directory /
+                                (Metadata.TRAIN + FileFormats.JSON),
+                                self.train.to_json(orient='split'))
 
         dtypes = self.test.dtypes.astype(str).to_dict()
         self._write_to_file(data_directory /
@@ -231,12 +235,16 @@ def _load_data(inst, path):
         :type path: str
         """
         data_directory = Path(path) / SerializationAttributes.DATA_DIRECTORY
-        with open(data_directory /
-                  (Metadata.TRAIN + _DTYPES + FileFormats.JSON), 'r') as file:
-            types = json.load(file)
-        with open(data_directory / (Metadata.TRAIN + FileFormats.JSON),
-                  'r') as file:
-            train = pd.read_json(file, dtype=types, orient='split')
+        train_data_json = data_directory / (Metadata.TRAIN + FileFormats.JSON)
+        if train_data_json.exists():
+            train_dtypes_path = (Metadata.TRAIN + _DTYPES + FileFormats.JSON)
+            train_dtypes_json = data_directory / train_dtypes_path
+            with open(train_dtypes_json, 'r') as file:
+                types = json.load(file)
+            with open(train_data_json, 'r') as file:
+                train = pd.read_json(file, dtype=types, orient='split')
+        else:
+            train = None
         inst.__dict__[Metadata.TRAIN] = train
         with open(data_directory /
                   (Metadata.TEST + _DTYPES + FileFormats.JSON), 'r') as file: