diff --git a/types/sensor_test.go b/types/sensor_test.go
index a1e06f4..c32277d 100644
--- a/types/sensor_test.go
+++ b/types/sensor_test.go
@@ -34,6 +34,7 @@ func TestSensor_New(t *testing.T) {
 				min:       -10,
 				max:       -5,
 				amplitude: 8,
+				mode:      WithSensorRandomMode,
 			},
 			want: want{
 				name: "negative sensors",