diff --git a/tests/test_litellm/llms/vertex_ai/vertex_ai_partner_models/anthropic/test_vertex_ai_partner_models_anthropic_transformation.py b/tests/test_litellm/llms/vertex_ai/vertex_ai_partner_models/anthropic/test_vertex_ai_partner_models_anthropic_transformation.py
index 4bcafd4c57e..3a49880ff16 100644
--- a/tests/test_litellm/llms/vertex_ai/vertex_ai_partner_models/anthropic/test_vertex_ai_partner_models_anthropic_transformation.py
+++ b/tests/test_litellm/llms/vertex_ai/vertex_ai_partner_models/anthropic/test_vertex_ai_partner_models_anthropic_transformation.py
@@ -459,7 +459,7 @@ def test_vertex_ai_partner_models_anthropic_remove_prompt_caching_scope_beta_hea
     assert PROMPT_CACHING_BETA_HEADER not in (
         beta_header or ""
     ), f"{PROMPT_CACHING_BETA_HEADER} should be filtered out"
-    assert "other-feature" in (
+    assert "other-feature" not in (
         beta_header or ""
     ), "Other non-excluded beta headers should remain"
     assert "web-search-2025-03-05" in (