diff --git a/tests/helpers/assertions.py b/tests/helpers/assertions.py
index 7694761c6..9587d5591 100644
--- a/tests/helpers/assertions.py
+++ b/tests/helpers/assertions.py
@@ -1001,7 +1001,9 @@ def _assert_transcript_matches(
     )
 
 
-def _retain_failed_speech_audio(audio_bytes: bytes | None, transcript: str, expected_text: Any, error: AssertionError) -> None:
+def _retain_failed_speech_audio(
+    audio_bytes: bytes | None, transcript: str, expected_text: Any, error: AssertionError
+) -> None:
     """Retain the exact ASR input when a CI speech-content assertion fails."""
     directory = os.environ.get("VLLM_OMNI_FAILED_SPEECH_AUDIO_DIR")
     if not directory or not audio_bytes:
diff --git a/tests/helpers/tests/test_assertions.py b/tests/helpers/tests/test_assertions.py
index b4e54d094..2fca68d65 100644
--- a/tests/helpers/tests/test_assertions.py
+++ b/tests/helpers/tests/test_assertions.py
@@ -295,9 +295,7 @@ def test_failed_speech_capture_retains_exact_asr_input_and_original_failure(
 
 @pytest.mark.parametrize("capture_enabled", [False, True])
 @pytest.mark.parametrize("content_failure", [False, True])
-def test_speech_capture_is_opt_in_and_does_not_write_successes(
-    monkeypatch, tmp_path, capture_enabled, content_failure
-):
+def test_speech_capture_is_opt_in_and_does_not_write_successes(monkeypatch, tmp_path, capture_enabled, content_failure):
     directory = tmp_path / "failed_audio"
     if capture_enabled:
         monkeypatch.setenv("VLLM_OMNI_FAILED_SPEECH_AUDIO_DIR", str(directory))