diff --git a/tests/unit/data/_async/test_client.py b/tests/unit/data/_async/test_client.py
index e43b4f849..6c49ca0da 100644
--- a/tests/unit/data/_async/test_client.py
+++ b/tests/unit/data/_async/test_client.py
@@ -1286,7 +1286,7 @@ async def test_customizable_retryable_errors(
             ("check_and_mutate_row", (b"row_key", None), "check_and_mutate_row"),
             (
                 "read_modify_write_row",
-                (b"row_key", IncrementRule('f', 'q')),
+                (b"row_key", IncrementRule("f", "q")),
                 "read_modify_write_row",
             ),
         ],