diff --git a/configs/config_all.yaml b/configs/config_all.yaml
index 82cd6824e..5e12f5d8c 100644
--- a/configs/config_all.yaml
+++ b/configs/config_all.yaml
@@ -726,7 +726,7 @@ process:
   - key_value_grouper:                                      # Group samples to batched samples according values in given keys.
       group_by_keys: null                                     # Group samples according values in the keys. Support for nested keys such as "__dj__stats__.text_len". It is [self.text_key] in default.
 
-# Aggregator ops.
+# aggregator ops.
   - entity_attribute_aggregator:                            # Return conclusion of the given entity's attribute from some docs.
       api_model: 'gpt-4o'                                     # API model name.
       entity: '孙悟空'                                         # The given entity.
diff --git a/tests/ops/Aggregator/__init__.py b/tests/ops/aggregator/__init__.py
similarity index 100%
rename from tests/ops/Aggregator/__init__.py
rename to tests/ops/aggregator/__init__.py
diff --git a/tests/ops/Aggregator/test_entity_attribute_aggregator.py b/tests/ops/aggregator/test_entity_attribute_aggregator.py
similarity index 100%
rename from tests/ops/Aggregator/test_entity_attribute_aggregator.py
rename to tests/ops/aggregator/test_entity_attribute_aggregator.py
diff --git a/tests/ops/Aggregator/test_most_relavant_entities_aggregator.py b/tests/ops/aggregator/test_most_relavant_entities_aggregator.py
similarity index 100%
rename from tests/ops/Aggregator/test_most_relavant_entities_aggregator.py
rename to tests/ops/aggregator/test_most_relavant_entities_aggregator.py
diff --git a/tests/ops/Aggregator/test_nested_aggregator.py b/tests/ops/aggregator/test_nested_aggregator.py
similarity index 100%
rename from tests/ops/Aggregator/test_nested_aggregator.py
rename to tests/ops/aggregator/test_nested_aggregator.py