diff --git a/pyproject.toml b/pyproject.toml
index 17fd838..3585173 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,6 +21,7 @@ server = ["fastapi", "redis", "hiredis"]
 dev = [
     "copier",
     "httpx",
+    "mockito",
     "pipdeptree",
     "pre-commit",
     "pyright",
diff --git a/src/daq_config_server/constants.py b/src/daq_config_server/constants.py
index caa3237..3a5f71e 100644
--- a/src/daq_config_server/constants.py
+++ b/src/daq_config_server/constants.py
@@ -4,6 +4,7 @@
 @dataclass(frozen=True)
 class Endpoints:
     FEATURE = "/featureflag"
+    FEATURE_DISALLOWED_SPECIALS = ["all"]
     BL_PARAM = "/beamlineparameters"
     INFO = "/info"
 
diff --git a/tests/test_api.py b/tests/test_api.py
index ccb889e..0825231 100644
--- a/tests/test_api.py
+++ b/tests/test_api.py
@@ -5,6 +5,7 @@
 import pytest
 from fastapi import status
 from fastapi.testclient import TestClient
+from mockito import when
 
 from daq_config_server.app import app
 from daq_config_server.beamline_parameters import GDABeamlineParameters
@@ -52,3 +53,15 @@ async def test_get_feature_list(self, mock_valkey: MagicMock, mock_app):
             ENDPOINTS.FEATURE,
             test_param_list,
         )
+
+    @patch("daq_config_server.app.valkey")
+    async def test_get_feature_list_w_values(self, mock_valkey: MagicMock, mock_app):
+        test_params = {"param_1": True, "param_2": True, "param_3": False}
+        mock_valkey.smembers.return_value = list(test_params.keys())
+        for param, value in test_params.items():
+            when(mock_valkey).get(param).thenReturn(value)
+        await _assert_get_and_response(
+            mock_app,
+            ENDPOINTS.FEATURE + "?get_values=true",
+            test_params,
+        )