diff --git a/dbt/adapters/clickhouse/impl.py b/dbt/adapters/clickhouse/impl.py
index 6be50365..4176e419 100644
--- a/dbt/adapters/clickhouse/impl.py
+++ b/dbt/adapters/clickhouse/impl.py
@@ -130,6 +130,7 @@ def get_clickhouse_local_suffix(self):
             if suffix.startswith('_'):
                 return f'{suffix}'
             return f'_{suffix}'
+        return ''
 
     @available.parse(lambda *a, **k: {})
     def get_clickhouse_local_db_prefix(self):