diff --git a/tests/fixtures/dummies.py b/tests/fixtures/dummies.py
index 63c4c52..ac84c5e 100644
--- a/tests/fixtures/dummies.py
+++ b/tests/fixtures/dummies.py
@@ -21,28 +21,6 @@
 from sms.models import Criteria, UpsertionDetails
 from sms.ports.inbound.docs_handler import DocsHandlerPort
 from sms.ports.inbound.objects_handler import ObjectsHandlerPort, S3ObjectStoragesPort
-from sms.ports.inbound.secrets_handler import SecretsHandlerPort
-
-
-class DummySecretsHandler(SecretsHandlerPort):
-    """Dummy SecretsHandler implementation for testing.
-
-    `secrets` is a dictionary that maps vault paths to lists of secrets.
-    """
-
-    def __init__(
-        self,
-        secrets: dict[str, list[str]] | None = None,
-    ):
-        self.secrets = secrets if secrets else {}
-
-    def get_secrets(self, vault_path: str) -> list[str]:
-        """Get all secrets currently stored for the specified vault."""
-        return self.secrets.get(vault_path, [])
-
-    def delete_secrets(self, vault_path: str) -> None:
-        """Delete all secrets stored in the vault."""
-        self.secrets.pop(vault_path, None)
 
 
 @dataclass
diff --git a/tests/unit/secrets/test_rest_secrets.py b/tests/unit/secrets/test_rest_secrets.py
index a8a0949..8d620b3 100644
--- a/tests/unit/secrets/test_rest_secrets.py
+++ b/tests/unit/secrets/test_rest_secrets.py
@@ -15,11 +15,11 @@
 """Unit tests for the Vault part of the SMS REST API."""
 
 from typing import Any
+from unittest.mock import Mock
 
 import pytest
 
 from tests.fixtures.config import DEFAULT_TEST_CONFIG
-from tests.fixtures.dummies import DummySecretsHandler
 from tests.fixtures.utils import VALID_BEARER_TOKEN, get_rest_client_with_mocks
 from tests.fixtures.vault import DEFAULT_VAULT_PATH
 
@@ -44,8 +44,8 @@
 )
 async def test_get_secrets(stored_secrets: list[str]):
     """Test the GET secrets endpoint without errors."""
-    vault_path_and_secrets = {DEFAULT_VAULT_PATH: stored_secrets}
-    secrets_handler = DummySecretsHandler(secrets=vault_path_and_secrets)
+    secrets_handler = Mock()
+    secrets_handler.get_secrets.return_value = stored_secrets
     async with get_rest_client_with_mocks(
         config=DEFAULT_TEST_CONFIG, secrets_handler_override=secrets_handler
     ) as client:
@@ -53,24 +53,16 @@ async def test_get_secrets(stored_secrets: list[str]):
 
     assert response.status_code == 200
     assert response.json() == stored_secrets
+    secrets_handler.get_secrets.assert_called_once_with(DEFAULT_VAULT_PATH)
 
 
-@pytest.mark.parametrize(
-    "stored_secrets",
-    [
-        [],
-        ["secret1", "secret2", "secret3"],
-    ],
-    ids=["VaultIsEmpty", "VaultHasThreeSecrets"],
-)
-async def test_delete_secrets(stored_secrets: list[str]):
+async def test_delete_secrets():
     """Test the DELETE secrets endpoint without errors."""
-    vault_path_and_secrets = {DEFAULT_VAULT_PATH: stored_secrets}
-    secrets_handler = DummySecretsHandler(secrets=vault_path_and_secrets)
+    secrets_handler = Mock()
     async with get_rest_client_with_mocks(
         config=DEFAULT_TEST_CONFIG, secrets_handler_override=secrets_handler
     ) as client:
         response = await client.delete(TEST_URL, headers=HEADERS)
 
     assert response.status_code == 204
-    assert secrets_handler.secrets.get(DEFAULT_VAULT_PATH, []) == []
+    secrets_handler.delete_secrets.assert_called_once_with(DEFAULT_VAULT_PATH)