diff --git a/android/hal-ipc-api.txt b/android/hal-ipc-api.txt
index 085e789..94432a1 100644
--- a/android/hal-ipc-api.txt
+++ b/android/hal-ipc-api.txt
@@ -1650,6 +1650,19 @@ Android HAL name: "gatt" (BT_PROFILE_GATT_ID)
 
 	Opcode 0x16 - Test Command command/response
 
+		Command parameters: Command (4 octets)
+		                    Test Parameters (32 octets)
+		Valid Test Parameter: Address (6 octets)
+		                      UUID (16 octets)
+		                      U1 (2 octets)
+		                      U2 (2 octets)
+		                      U3 (2 octets)
+		                      U4 (2 octets)
+		                      U5 (2 octets)
+		Response parameters: <none>
+
+		In case of an error, the error response will be returned.
+
 	Opcode 0x17 - Register Server command/response
 	Opcode 0x18 - Unregister Server command/response
 	Opcode 0x19 - Connect Peripheral command/response
diff --git a/android/hal-msg.h b/android/hal-msg.h
index 937aa20..9bb072d 100644
--- a/android/hal-msg.h
+++ b/android/hal-msg.h
@@ -686,6 +686,22 @@ struct hal_cmd_gatt_client_set_adv_data {
 	uint8_t  manufacturer_data[0];
 } __attribute__((packed));
 
+#define HAL_OP_GATT_CLIENT_TEST_COMMAND		0x16
+struct hal_gatt_test_params {
+	uint8_t  bda1[6];
+	uint8_t  uuid1[16];
+	uint16_t u1;
+	uint16_t u2;
+	uint16_t u3;
+	uint16_t u4;
+	uint16_t u5;
+} __attribute__((packed));
+
+struct hal_cmd_gatt_client_test_command {
+	int32_t command;
+	struct hal_gatt_test_params params;
+} __attribute__((packed));
+
 /* Notifications and confirmations */
 
 #define HAL_POWER_OFF			0x00