diff --git a/tests/test_litellm/test_openai_service_tier_long_context_pricing.py b/tests/test_litellm/test_openai_service_tier_long_context_pricing.py
index 70e9c2720b8..bdb2dc26813 100644
--- a/tests/test_litellm/test_openai_service_tier_long_context_pricing.py
+++ b/tests/test_litellm/test_openai_service_tier_long_context_pricing.py
@@ -69,6 +69,7 @@ NO_PUBLISHED_PRIORITY_LONG_CONTEXT = ("gpt-5.4", "gpt-5.5")
 def _local_model_cost_map(monkeypatch: pytest.MonkeyPatch) -> None:
     monkeypatch.setenv("LITELLM_LOCAL_MODEL_COST_MAP", "True")
     monkeypatch.setattr(litellm, "model_cost", litellm.get_model_cost_map(url=""))
+    litellm.add_known_models()
 
 
 @lru_cache(maxsize=2)