Update test_databases.py

Author: tomchristie

tests/test_databases.py

@@ -809,8 +809,7 @@ async def test_iterate_outside_transaction_with_temp_table(database_url):
 @async_adapter
 async def test_column_names(database_url, select_query):
     """
-    Test that the basic `execute()`, `execute_many()`, `fetch_all()``, and
-    `fetch_one()` interfaces are all supported (using SQLAlchemy core).
+    Test that column names are exposed correctly through `.keys()` on each row.
     """
     async with Database(database_url) as database:
         async with database.transaction(force_rollback=True):