diff --git a/gooddata-sdk/tests/catalog/test_catalog_data_source.py b/gooddata-sdk/tests/catalog/test_catalog_data_source.py
index 41d3ba61..f69c4e7d 100644
--- a/gooddata-sdk/tests/catalog/test_catalog_data_source.py
+++ b/gooddata-sdk/tests/catalog/test_catalog_data_source.py
@@ -839,7 +839,6 @@ def test_jdbc_urls_creation(
     parameters: Optional[list],
     url_params: Optional[list],
 ):
-    db_class: type[CatalogDataSource] = db_class
     data_source = db_class(
         id="test",
         name="Test",