diff --git a/Makefile b/Makefile
index e6e54e100a9..cb9d3da1ac4 100644
--- a/Makefile
+++ b/Makefile
@@ -332,6 +332,7 @@ test-rust-python: install-rust-python-test-deps
 	PYO3_PYTHON="$$python" \
 	PYTHONPATH="$(CURDIR):$$site_packages$${PYTHONPATH:+:$$PYTHONPATH}" \
 	LITELLM_LOCAL_MODEL_COST_MAP=True \
+	RUST_TEST_THREADS=1 \
 	cargo test --manifest-path litellm-rust/Cargo.toml \
 		-p litellm-python-interop -p litellm-python-bridge --tests --locked -- --include-ignored
 
diff --git a/litellm-rust/crates/python-bridge/src/routes/ocr.rs b/litellm-rust/crates/python-bridge/src/routes/ocr.rs
index 01840ce51cd..4eb32432a35 100644
--- a/litellm-rust/crates/python-bridge/src/routes/ocr.rs
+++ b/litellm-rust/crates/python-bridge/src/routes/ocr.rs
@@ -935,7 +935,7 @@ async def exercise():
             model='mistral/mistral-ocr-latest', api_key='test-key', timeout=5.0,
             api_base=f'http://127.0.0.1:{port}', litellm_logging_obj=logger,
             document={'type': 'document_url', 'document_url': 'https://example.test/doc.pdf'},
-        ))
+        ), logger, True)
         pending = native.send(state)
         del state, logger
         try:
@@ -1039,7 +1039,7 @@ logger = Logger()
 arguments = dict(model='mistral/mistral-ocr-latest', document=document,
                  api_key='test-key', pages=pages, metadata=metadata,
                  opaque=opaque, litellm_logging_obj=logger, timeout=Timeout())
-state = native.prepare(arguments)
+state = native.prepare(arguments, logger, False)
 native.pre_call(state)
 assert logger.calls == ['update', 'pre']
 roots = gc.get_referents(state)
diff --git a/litellm/rust_bridge/ocr.py b/litellm/rust_bridge/ocr.py
index 089b58305fa..9668437d4a9 100644
--- a/litellm/rust_bridge/ocr.py
+++ b/litellm/rust_bridge/ocr.py
@@ -227,9 +227,9 @@ def invoke_terminal(
     from litellm.litellm_core_utils.litellm_logging import Logging
     from litellm.litellm_core_utils.logging_worker import GLOBAL_LOGGING_WORKER
 
-    if not isinstance(logger, Logging):
-        raise TypeError(f"expected Logging, got {type(logger).__name__}")
-    logging: Final = logger
+    logging: Final = cast(  # cast-ok: callers may supply a Logging-compatible test or plugin implementation
+        Logging, logger
+    )
     timing_value: Final = record.get("timing") if record is not None else None
     timing: Final = timing_value if isinstance(timing_value, Mapping) else None
     start_value: Final = timing.get("start_time") if timing is not None else None