[CI] Fix huggingface access for test_flash_attention_4.py (#12846)

scripts/ci/ci_install_dependency.sh

@@ -22,8 +22,6 @@ echo "CUDA_VISIBLE_DEVICES=${CUDA_VISIBLE_DEVICES:-}"
 
 # Clear torch compilation cache
 python3 -c 'import os, shutil, tempfile, getpass; cache_dir = os.environ.get("TORCHINDUCTOR_CACHE_DIR") or os.path.join(tempfile.gettempdir(), "torchinductor_" + getpass.getuser()); shutil.rmtree(cache_dir, ignore_errors=True)'
-rm -rf /root/.cache/flashinfer
-pip3 uninstall flashinfer-python flashinfer-cubin flashinfer-jit-cache || true
 
 # Install apt packages
 apt install -y git libnuma-dev libssl-dev pkg-config
@@ -80,6 +78,7 @@ if [ "$IS_BLACKWELL" = "1" ]; then
 
     # Clean up existing installations
     $PIP_CMD uninstall -y sgl-kernel sglang $PIP_INSTALL_SUFFIX || true
+    $PIP_CMD uninstall -y flashinfer-python flashinfer-cubin flashinfer-jit-cache $PIP_INSTALL_SUFFIX || true
 else
     # In normal cases, we use uv, which is much faster than pip.
     pip install --upgrade pip
@@ -91,6 +90,7 @@ else
 
     # Clean up existing installations
     $PIP_CMD uninstall sgl-kernel sglang || true
+    $PIP_CMD uninstall flashinfer-python flashinfer-cubin flashinfer-jit-cache || true
 fi
 
 # Install the main package

test/srt/test_flash_attention_4.py

@@ -5,7 +5,6 @@ from sglang.srt.environ import envs
 from sglang.srt.utils import get_device_sm, kill_process_tree
 from sglang.test.few_shot_gsm8k import run_eval as run_eval_few_shot_gsm8k
 from sglang.test.test_utils import (
-    DEFAULT_MODEL_NAME_FOR_TEST,
     DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
     DEFAULT_URL_FOR_TEST,
     popen_launch_server,
@@ -16,7 +15,7 @@ from sglang.test.test_utils import (
 class TestFlashAttention4(unittest.TestCase):
     @classmethod
     def setUpClass(cls):
-        cls.model = DEFAULT_MODEL_NAME_FOR_TEST
+        cls.model = "Qwen/Qwen3-8B"
         cls.base_url = DEFAULT_URL_FOR_TEST
         other_args = [
             "--trust-remote-code",
@@ -49,7 +48,7 @@ class TestFlashAttention4(unittest.TestCase):
         metrics = run_eval_few_shot_gsm8k(args)
         print(metrics)
 
-        self.assertGreater(metrics["accuracy"], 0.65)
+        self.assertGreater(metrics["accuracy"], 0.75)
 
 
 if __name__ == "__main__":