diff --git a/tests/rust-python-harness/strategies/trace_parity/models.py b/tests/rust-python-harness/strategies/trace_parity/models.py
index fd4585d85c1..3701fb41e14 100644
--- a/tests/rust-python-harness/strategies/trace_parity/models.py
+++ b/tests/rust-python-harness/strategies/trace_parity/models.py
@@ -66,7 +66,6 @@ class TraceScenario:
     fixture: Callable[[Engine, str], RouteFixture]
     mappings: tuple[TraceMapping, ...]
     asynchronous: bool
-    python_rust_enabled: bool = False
 
 
 @dataclass(frozen=True, slots=True)
diff --git a/tests/rust-python-harness/strategies/trace_parity/sdk/execution.py b/tests/rust-python-harness/strategies/trace_parity/sdk/execution.py
index 2ef8a0584bc..ffdbe842e85 100644
--- a/tests/rust-python-harness/strategies/trace_parity/sdk/execution.py
+++ b/tests/rust-python-harness/strategies/trace_parity/sdk/execution.py
@@ -3,7 +3,6 @@ from __future__ import annotations
 import asyncio
 import os
 from collections.abc import AsyncIterable, Awaitable, Iterable
-from contextlib import nullcontext
 from dataclasses import dataclass
 from pathlib import Path
 from typing import Final, Protocol, cast
@@ -107,9 +106,7 @@ def _collect(
     return _CollectedTrace(tuple(profiler.events), error)
 
 
-def collect_trace(
-    spec: RouteSpec, engine: Engine, *, asynchronous: bool, python_rust_enabled: bool = False
-) -> tuple[FunctionTraceEvent, ...] | TraceExecutionFailure:
+def collect_trace(spec: RouteSpec, engine: Engine, *, asynchronous: bool) -> tuple[FunctionTraceEvent, ...] | TraceExecutionFailure:
     function: Final = _entrypoint(spec, engine, asynchronous=asynchronous)
     if isinstance(function, TraceExecutionFailure):
         return function
@@ -130,12 +127,7 @@ def collect_trace(
                 consume_stream=base_fixture.consume_stream,
                 environment=base_fixture.environment,
             )
-            environment: Final = (
-                patch.dict(os.environ, {"LITELLM_RUST": "1" if python_rust_enabled else "0"})
-                if engine == "python"
-                else nullcontext()
-            )
-            with environment, patch.dict(os.environ, fixture.environment):
+            with patch.dict(os.environ, fixture.environment):
                 collected: Final = _collect(function, fixture, engine, asynchronous=asynchronous)
             provider.take_requests(len(fixture.provider_responses))
     except Exception as error:
@@ -172,7 +164,6 @@ def execute_trace(
             scenario_route,
             "python",
             asynchronous=scenario.asynchronous,
-            python_rust_enabled=scenario.python_rust_enabled,
         )
         if engine != "rust"
         else ()
diff --git a/tests/rust-python-harness/strategies/trace_parity/sdk/ocr/case.py b/tests/rust-python-harness/strategies/trace_parity/sdk/ocr/case.py
index 58b16c68383..bb21e8ab0c5 100644
--- a/tests/rust-python-harness/strategies/trace_parity/sdk/ocr/case.py
+++ b/tests/rust-python-harness/strategies/trace_parity/sdk/ocr/case.py
@@ -498,14 +498,12 @@ TRACE_SUITE: Final = TraceSuite(
             fixture=_mistral_fixture,
             mappings=PUBLIC_RUST_DISPATCH_MAPPINGS,
             asynchronous=False,
-            python_rust_enabled=True,
         ),
         TraceScenario(
             name="async-public-rust-dispatch",
             fixture=_mistral_fixture,
             mappings=PUBLIC_RUST_DISPATCH_MAPPINGS,
             asynchronous=True,
-            python_rust_enabled=True,
         ),
     ),
 )
diff --git a/tests/rust-python-harness/strategies/trace_parity/test_runner.py b/tests/rust-python-harness/strategies/trace_parity/test_runner.py
index b940221bb7a..57364057788 100644
--- a/tests/rust-python-harness/strategies/trace_parity/test_runner.py
+++ b/tests/rust-python-harness/strategies/trace_parity/test_runner.py
@@ -80,7 +80,7 @@ def test_python_engine_skips_native_bridge(monkeypatch: pytest.MonkeyPatch, tmp_
     assert selected == [(frozenset({"mistral"}), "python")]
 
 
-def test_python_trace_controls_native_ocr_dispatch(monkeypatch: pytest.MonkeyPatch) -> None:
+def test_python_trace_preserves_native_ocr_dispatch_setting(monkeypatch: pytest.MonkeyPatch) -> None:
     execution: Final = importlib.import_module("tests.rust-python-harness.strategies.trace_parity.sdk.execution")
     route: Final = RouteSpec("ocr", ("ocr", "aocr"), ("ocr", "aocr"), _fixture)
     observed: list[str | None] = []
@@ -98,11 +98,12 @@ def test_python_trace_controls_native_ocr_dispatch(monkeypatch: pytest.MonkeyPat
             error=None,
         )
 
-    monkeypatch.setenv("LITELLM_RUST", "1")
     monkeypatch.setattr(execution, "_collect", collect)
 
+    monkeypatch.setenv("LITELLM_RUST", "0")
     collect_trace(route, "python", asynchronous=False)
-    collect_trace(route, "python", asynchronous=True, python_rust_enabled=True)
+    monkeypatch.setenv("LITELLM_RUST", "1")
+    collect_trace(route, "python", asynchronous=True)
 
     assert observed == ["0", "1"]
     assert os.environ["LITELLM_RUST"] == "1"