diff --git a/libraries/AP_Motors/AP_MotorsMatrix.cpp b/libraries/AP_Motors/AP_MotorsMatrix.cpp
index f9a93d4ecc..b4bc88c747 100644
--- a/libraries/AP_Motors/AP_MotorsMatrix.cpp
+++ b/libraries/AP_Motors/AP_MotorsMatrix.cpp
@@ -329,7 +329,7 @@ void AP_MotorsMatrix::output_disarmed()
     output_min();
 }
 
-// output_disarmed - sends commands to the motors
+// output_test - spin each motor for a moment to allow the user to confirm the motor order and spin direction
 void AP_MotorsMatrix::output_test()
 {
     uint8_t min_order, max_order;
diff --git a/libraries/AP_Motors/AP_MotorsMatrix.h b/libraries/AP_Motors/AP_MotorsMatrix.h
index ef7e0953bb..2400c4e4ed 100644
--- a/libraries/AP_Motors/AP_MotorsMatrix.h
+++ b/libraries/AP_Motors/AP_MotorsMatrix.h
@@ -39,7 +39,7 @@ public:
     // enable - starts allowing signals to be sent to motors
     virtual void        enable();
 
-    // motor test
+    // output_test - spin each motor for a moment to allow the user to confirm the motor order and spin direction
     virtual void        output_test();
 
     // output_min - sends minimum values out to the motors