diff --git a/tests/utils/repository/test_model_repository.py b/tests/utils/repository/test_model_repository.py
index 61d1cea..8d7d84a 100644
--- a/tests/utils/repository/test_model_repository.py
+++ b/tests/utils/repository/test_model_repository.py
@@ -308,6 +308,23 @@ def test_init_artifacts_data_none_y_pred(mock_model_serving_class, mock_logger,
         repo._init_artifacts_data(mock_train_result)
 
 
+@patch('model_manager.utils.repository.model_repository.ModelServing')
+def test_init_artifacts_data_none_y_train_pred(
+    mock_model_serving_class, mock_logger, mock_train_result
+):
+    """Test _init_artifacts_data raises ValueError when y_train_pred is None."""
+    from model_manager.utils.repository.model_repository import ModelRepository
+
+    repo = ModelRepository(
+        url='http://mlflow.test', username='user', password='pass', logger=mock_logger
+    )
+
+    mock_train_result.y_train_pred = None
+
+    with pytest.raises(ValueError, match='Training predictions .* are None'):
+        repo._init_artifacts_data(mock_train_result)
+
+
 @patch('model_manager.utils.repository.model_repository.ModelServing')
 @patch('model_manager.utils.repository.model_repository.datetime')
 @patch('model_manager.utils.repository.model_repository.makedirs')