diff --git a/tests/unittests/agents/test_readonly_context.py b/tests/unittests/agents/test_readonly_context.py
index 1ab14271..aa4bafec 100644
--- a/tests/unittests/agents/test_readonly_context.py
+++ b/tests/unittests/agents/test_readonly_context.py
@@ -2,26 +2,14 @@ from types import MappingProxyType
 from unittest.mock import MagicMock
 
 from google.adk.agents.readonly_context import ReadonlyContext
-from google.adk.auth.credential_service.base_credential_service import BaseCredentialService
 import pytest
 
-
-class DummyCredentialService(BaseCredentialService):
-  async def load_credential(self,auth_config, tool_context):
-    pass
-
-  async def save_credential(self,auth_config, tool_context):
-    pass
-
-
 @pytest.fixture
 def mock_invocation_context():
   mock_context = MagicMock()
   mock_context.invocation_id = "test-invocation-id"
   mock_context.agent.name = "test-agent-name"
   mock_context.session.state = {"key1": "value1", "key2": "value2"}
-  mock_context.credential_service = DummyCredentialService()
-
   return mock_context
 
 
@@ -42,9 +30,3 @@ def test_state_content(mock_invocation_context):
   assert isinstance(state, MappingProxyType)
   assert state["key1"] == "value1"
   assert state["key2"] == "value2"
-
-
-def test_credential_service(mock_invocation_context):
-  readonly_context = ReadonlyContext(mock_invocation_context)
-  assert readonly_context.credential_service is not None
-  assert isinstance(readonly_context.credential_service, BaseCredentialService)