diff --git a/tests/unit/test_storage/test_rows_cassandra_storage.py b/tests/unit/test_storage/test_rows_cassandra_storage.py
index ec2748dc..852f01a1 100644
--- a/tests/unit/test_storage/test_rows_cassandra_storage.py
+++ b/tests/unit/test_storage/test_rows_cassandra_storage.py
@@ -442,7 +442,7 @@ class TestUnifiedTableStructure:
     def test_ensure_tables_idempotent(self):
         """Test that ensure_tables is idempotent"""
         processor = MagicMock()
-        processor.tables_initialized = {"default"}  # Already initialized
+        processor.tables_initialized = {"test_user"}  # Already initialized
         processor.session = MagicMock()
         processor.ensure_tables = Processor.ensure_tables.__get__(processor, Processor)