diff --git a/tests/conftest.py b/tests/conftest.py
index ea47250..3144a78 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -43,9 +43,7 @@ class SyntheticUsageChatClient(OpenAIChatCompletionClient):
         default_reply: str = "ok",
         tokens_per_reply: int = 8,
     ) -> None:
-        super().__init__(
-            model="synthetic", api_key="synthetic", base_url="http://127.0.0.1:9/v1"
-        )
+        super().__init__(model="synthetic", api_key="synthetic", base_url="http://127.0.0.1:9/v1")
         self._scripted = list(scripted or [])
         self._idx = 0
         self._default = default_reply