diff --git a/tests/unit/test_prompt.py b/tests/unit/test_prompt.py
index eadfb8221..598deaec5 100644
--- a/tests/unit/test_prompt.py
+++ b/tests/unit/test_prompt.py
@@ -127,15 +127,13 @@ def test_compile_with_placeholders(
 
 @pytest.fixture
 def langfuse():
-    from langfuse._client.resource_manager import LangfuseResourceManager
-
-    langfuse_instance = Langfuse()
+    langfuse_instance = Langfuse(
+        public_key="pk-lf-test",
+        secret_key="sk-lf-test",
+        base_url="http://localhost:3000",
+    )
     langfuse_instance.api = Mock()
 
-    if langfuse_instance._resources is None:
-        langfuse_instance._resources = Mock(spec=LangfuseResourceManager)
-        langfuse_instance._resources.prompt_cache = PromptCache()
-
     return langfuse_instance