diff --git a/tests/src/mocks/sensor_mock.hpp b/tests/src/mocks/sensor_mock.hpp
index b86a26e..9ff72e2 100644
--- a/tests/src/mocks/sensor_mock.hpp
+++ b/tests/src/mocks/sensor_mock.hpp
@@ -24,6 +24,7 @@
     }
 
     MOCK_METHOD(Id, id, (), (const, override));
+    MOCK_METHOD(std::string, metadata, (), (const, override));
     MOCK_METHOD(void, registerForUpdates,
                 (const std::weak_ptr<interfaces::SensorListener>&), (override));
     MOCK_METHOD(void, unregisterFromUpdates,