[Test] Re-enable Voxtral HF reference test on Transformers v5 (#59771)

Signed-off-by: AbhayShuklaIIT <abhay.shukla@live.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

tests/models/multimodal/generation/test_voxtral.py

@@ -146,10 +146,6 @@ def test_online_serving(vllm_runner, audio_assets: AudioTestAssets):
     )
 
 
-@pytest.mark.skip(
-    reason="VoxtralProcessor.apply_chat_template() in transformers v5 "
-    "doesn't resolve chat_template=None to the default template"
-)
 def test_hf_reference(hf_runner, vllm_runner, audio_assets: AudioTestAssets):
     """Compare vLLM Mistral-format output against HF Transformers reference.
 
@@ -157,9 +153,6 @@ def test_hf_reference(hf_runner, vllm_runner, audio_assets: AudioTestAssets):
     attention backends), we compare per-token logprobs using the standard
     check_logprobs_close helper: when tokens diverge at a position, each
     runner's chosen token must appear in the other's top-k logprobs.
-
-    Marked xfail(strict=False) so remaining edge-case mismatches
-    don't block CI.
     """
     question = f"What's happening in these {len(audio_assets)} audio clips?"
     max_tokens = 10