diff --git a/tests/basic/test_reasoning.py b/tests/basic/test_reasoning.py
index b9b5363bd..b9db9c6c4 100644
--- a/tests/basic/test_reasoning.py
+++ b/tests/basic/test_reasoning.py
@@ -90,7 +90,9 @@ class TestReasoning(unittest.TestCase):
 
         # Mock streaming response chunks
         class MockStreamingChunk:
-            def __init__(self, content=None, reasoning_content=None, reasoning=None, finish_reason=None):
+            def __init__(
+                self, content=None, reasoning_content=None, reasoning=None, finish_reason=None
+            ):
                 self.choices = [MagicMock()]
                 self.choices[0].delta = MagicMock()
                 self.choices[0].finish_reason = finish_reason
@@ -108,7 +110,7 @@ class TestReasoning(unittest.TestCase):
                 else:
                     # Need to handle attribute access that would raise AttributeError
                     delattr(self.choices[0].delta, "reasoning_content")
-                
+
                 # Set reasoning if provided
                 if reasoning is not None:
                     self.choices[0].delta.reasoning = reasoning
@@ -271,7 +273,9 @@ class TestReasoning(unittest.TestCase):
 
         # Mock streaming response chunks
         class MockStreamingChunk:
-            def __init__(self, content=None, reasoning_content=None, reasoning=None, finish_reason=None):
+            def __init__(
+                self, content=None, reasoning_content=None, reasoning=None, finish_reason=None
+            ):
                 self.choices = [MagicMock()]
                 self.choices[0].delta = MagicMock()
                 self.choices[0].finish_reason = finish_reason
@@ -289,7 +293,7 @@ class TestReasoning(unittest.TestCase):
                 else:
                     # Need to handle attribute access that would raise AttributeError
                     delattr(self.choices[0].delta, "reasoning_content")
-                
+
                 # Set reasoning if provided
                 if reasoning is not None:
                     self.choices[0].delta.reasoning = reasoning