[Hotfix] [Debug] test_openai_server.py::test_guided_regex_completion (#3383)

.buildkite/test-pipeline.yaml

@@ -13,7 +13,7 @@ steps:
 
 - label: Basic Correctness Test
   command: pytest -v -s --forked basic_correctness
-  
+
 - label: Core Test
   command: pytest -v -s core
 

requirements.txt

@@ -12,5 +12,5 @@ pydantic >= 2.0  # Required for OpenAI server.
 prometheus_client >= 0.18.0
 pynvml == 11.5.0
 triton >= 2.1.0
-outlines >= 0.0.27
+outlines == 0.0.34
 cupy-cuda12x == 12.1.0  # Required for CUDA graphs. CUDA 11.8 users should install cupy-cuda11x instead.