diff --git a/include/mce/dbus-names.h b/include/mce/dbus-names.h
index 96db04e..5129420 100644
--- a/include/mce/dbus-names.h
+++ b/include/mce/dbus-names.h
@@ -1031,6 +1031,21 @@
  */
 # define MCE_BUTTON_BACKLIGHT_CHANGE_REQ   "req_button_backlight_change"
 
+/** Request button backlight mode change
+ *
+ * @since mce 1.98.0
+ *
+ * For use from the CSD application button backlight verification test.
+ *
+ * Allows bypassing of the button backlight policy and explicitly turn
+ * the backlight on or off.
+ *
+ * @param mode int32: #MCE_BUTTON_BACKLIGHT_MODE_OFF,
+ *                    #MCE_BUTTON_BACKLIGHT_MODE_ON, or
+ *                    #MCE_BUTTON_BACKLIGHT_MODE_POLICY
+ */
+# define MCE_BUTTON_BACKLIGHT_MODE_REQ     "req_button_backlight_mode"
+
 /** Indication for change of button backlight state
  *
  * @since mce 1.90.0
diff --git a/include/mce/mode-names.h b/include/mce/mode-names.h
index a0152da..0461c81 100644
--- a/include/mce/mode-names.h
+++ b/include/mce/mode-names.h
@@ -736,4 +736,31 @@
 
 /*@}*/
 
+/////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////
+/** @name Button backlight operation modes
+ *
+ *@{
+ */
+
+/** Button backlight should be turned off
+ *
+ * @since mce 1.98.0
+ */
+#define MCE_BUTTON_BACKLIGHT_MODE_OFF    0
+
+/** Button backlight should be turned on
+ *
+ * @since mce 1.98.0
+ */
+#define MCE_BUTTON_BACKLIGHT_MODE_ON     1
+
+/** Button backlight should be turned on/off according to policy
+ *
+ * @since mce 1.98.0
+ */
+#define MCE_BUTTON_BACKLIGHT_MODE_POLICY 2
+
+/*@}*/
+
 #endif /* MCE_MODE_NAMES_H_ */