diff --git a/src/firebolt_db/firebolt_async_dialect.py b/src/firebolt_db/firebolt_async_dialect.py
index 8ceeca0..9ca2bf2 100644
--- a/src/firebolt_db/firebolt_async_dialect.py
+++ b/src/firebolt_db/firebolt_async_dialect.py
@@ -126,7 +126,7 @@ def commit(self) -> None:
         self._connection.commit()
 
     def close(self) -> None:
-        self.await_(self._connection._aclose())
+        self.await_(self._connection.aclose())
 
 
 class AsyncAPIWrapper(ModuleType):
diff --git a/tests/unit/test_firebolt_async_dialect.py b/tests/unit/test_firebolt_async_dialect.py
index d6a49cb..977976d 100644
--- a/tests/unit/test_firebolt_async_dialect.py
+++ b/tests/unit/test_firebolt_async_dialect.py
@@ -58,7 +58,7 @@ def test_connection() -> AsyncConnectionWrapper:
         wrapper = await greenlet_spawn(test_connection)
         assert isinstance(wrapper.cursor(), AsyncCursorWrapper)
         async_api.connect.return_value.commit.assert_called_once()
-        async_api.connect.return_value._aclose.assert_awaited_once()
+        async_api.connect.return_value.aclose.assert_awaited_once()
 
     @pytest.mark.asyncio
     async def test_cursor_execute(