diff --git a/litellm/constants.py b/litellm/constants.py
index 02413ee97ab..e7cb332e712 100644
--- a/litellm/constants.py
+++ b/litellm/constants.py
@@ -603,9 +603,7 @@ LOGGING_EXECUTOR_MAX_THREADS: Final = get_env_int("LOGGING_EXECUTOR_MAX_THREADS"
 LOGGING_EXECUTOR_MAX_PENDING_TASKS: Final = get_env_int("LOGGING_EXECUTOR_MAX_PENDING_TASKS", 10_000)
 LOGGING_EXECUTOR_DROPPED_TASK_LOG_INTERVAL_SECONDS: Final = 30.0
 AWS_SIGNING_MAX_THREADS: Final = 16
-PROMPT_INJECTION_HEURISTICS_MAX_THREADS: Final = get_env_int(
-    "PROMPT_INJECTION_HEURISTICS_MAX_THREADS", os.cpu_count() or 1
-)
+PROMPT_INJECTION_HEURISTICS_MAX_THREADS: Final = get_env_int("PROMPT_INJECTION_HEURISTICS_MAX_THREADS", 1)
 DD_TRACER_STREAMING_CHUNK_YIELD_RESOURCE: Final = os.getenv(
     "DD_TRACER_STREAMING_CHUNK_YIELD_RESOURCE", "streaming.chunk.yield"
 )
diff --git a/tests/test_litellm/proxy/hooks/test_prompt_injection_detection.py b/tests/test_litellm/proxy/hooks/test_prompt_injection_detection.py
index b189ee740fe..919914b6a0b 100644
--- a/tests/test_litellm/proxy/hooks/test_prompt_injection_detection.py
+++ b/tests/test_litellm/proxy/hooks/test_prompt_injection_detection.py
@@ -1,6 +1,5 @@
 import asyncio
 import importlib
-import os
 import time
 from concurrent.futures import ThreadPoolExecutor
 
@@ -156,7 +155,7 @@ async def test_heuristics_check_does_not_occupy_default_executor():
 
 @pytest.mark.parametrize(
     ("configured", "expected"),
-    [("3", 3), ("not-an-int", os.cpu_count() or 1)],
+    [("3", 3), ("not-an-int", 1)],
 )
 def test_heuristics_thread_count_config_is_honoured(monkeypatch: pytest.MonkeyPatch, configured: str, expected: int):
     monkeypatch.setenv("PROMPT_INJECTION_HEURISTICS_MAX_THREADS", configured)