diff --git a/litellm/proxy/hooks/parallel_request_limiter_v3.py b/litellm/proxy/hooks/parallel_request_limiter_v3.py
index 071eb07e265..44adcd16a97 100644
--- a/litellm/proxy/hooks/parallel_request_limiter_v3.py
+++ b/litellm/proxy/hooks/parallel_request_limiter_v3.py
@@ -369,7 +369,7 @@ PROJECT_OTPM_DESCRIPTOR_KEY: Final = "model_per_project_otpm"
 # considered leaked (worker crashed without any release callback firing) and
 # pruned. Also the longest request duration the gauge can track: a request
 # running longer than this stops occupying its slot.
-PARALLEL_REQUEST_SLOT_TTL_SECONDS: Final = int(os.getenv("LITELLM_PARALLEL_REQUEST_SLOT_TTL_SECONDS", "3600"))
+PARALLEL_REQUEST_SLOT_TTL_SECONDS: Final = max(1, int(os.getenv("LITELLM_PARALLEL_REQUEST_SLOT_TTL_SECONDS", "3600")))
 
 
 CacheCounterValue: TypeAlias = int | float | str | bytes
diff --git a/tests/test_litellm/litellm_core_utils/test_litellm_logging.py b/tests/test_litellm/litellm_core_utils/test_litellm_logging.py
index d656210f733..e05dbdefffc 100644
--- a/tests/test_litellm/litellm_core_utils/test_litellm_logging.py
+++ b/tests/test_litellm/litellm_core_utils/test_litellm_logging.py
@@ -4960,7 +4960,7 @@ def test_pre_call_redacts_and_masks_raw_request(logging_obj):
     assert "key=*****" in raw_api_base
 
 
-def _streaming_logging_obj_with_callbacks(callbacks):
+def _streaming_logging_obj_with_callbacks(callbacks: list[CustomLogger]):
     from datetime import datetime
 
     obj = LitellmLogging(