[V1] V1 Enablement Oracle (#13726)

Signed-off-by: rshaw@neuralmagic.com <rshaw@neuralmagic.com>
Co-authored-by: rshaw@neuralmagic.com <rshaw@neuralmagic.com>
Co-authored-by: Nicolò Lucchesi <nlucches@redhat.com>
Co-authored-by: Tyler Michael Smith <tyler@neuralmagic.com>
Co-authored-by: Michael Goin <michael@neuralmagic.com>

tests/basic_correctness/test_cpu_offload.py

@@ -1,8 +1,15 @@
 # SPDX-License-Identifier: Apache-2.0
 
+import pytest
+
 from ..utils import compare_two_settings
 
 
+@pytest.fixture(scope="function", autouse=True)
+def use_v0_only(monkeypatch):
+    monkeypatch.setenv('VLLM_USE_V1', '0')
+
+
 def test_cpu_offload():
     compare_two_settings("meta-llama/Llama-3.2-1B-Instruct", [],
                          ["--cpu-offload-gb", "1"])