diff --git a/firmware/controllers/sensors/sensor.cpp b/firmware/controllers/sensors/sensor.cpp
index 2e12d73caa..d9afa168f8 100644
--- a/firmware/controllers/sensors/sensor.cpp
+++ b/firmware/controllers/sensors/sensor.cpp
@@ -85,7 +85,9 @@ bool Sensor::Register() {
 	// If there's somebody already here - a consumer tried to double-register a sensor
 	if (entry.getSensor()) {
 		// This sensor has already been registered. Don't re-register it.
+#if ! EFI_UNIT_TEST
 		firmwareError(CUSTOM_OBD_26, "Duplicate registration for %s sensor", s_sensorNames[getIndex()]);
+#endif
 		return false;
 	} else {
 		// put ourselves in the registry