diff --git a/test/auto-pts/btp.h b/test/auto-pts/btp.h
index e8eb032ef..b3b20010f 100644
--- a/test/auto-pts/btp.h
+++ b/test/auto-pts/btp.h
@@ -201,6 +201,7 @@ extern "C" {
 #define BTP_GATT_OP_SIGNED_WRITE_WITHOUT_RSP    0x16
 #define BTP_GATT_OP_WRITE                       0x17
 #define BTP_GATT_OP_WRITE_LONG                  0x18
+#define BTP_GATT_OP_WRITE_RELIABLE              0x19
 #define BTP_GATT_OP_CFG_NOTIFY                  0x1a
 #define BTP_GATT_OP_CFG_INDICATE                0x1b
 #define BTP_GATT_OP_GET_ATTRIBUTES              0x1c
diff --git a/test/auto-pts/btpclient.c b/test/auto-pts/btpclient.c
index 0722cb743..d4c8c06f5 100644
--- a/test/auto-pts/btpclient.c
+++ b/test/auto-pts/btpclient.c
@@ -573,8 +573,9 @@ static void gatt_client_packet_handler(uint8_t packet_type, uint16_t channel, ui
                             btp_append_uint16(0);
                         }
                         break;
-                    case BTP_GATT_OP_WRITE_LONG:
                     case BTP_GATT_OP_WRITE:
+                    case BTP_GATT_OP_WRITE_LONG:
+                    case BTP_GATT_OP_WRITE_RELIABLE:
                         // ignore timeout / auto-pts framework expects to get a socket read timeout
                         if (att_status == ATT_ERROR_TIMEOUT) return;
 
@@ -1524,6 +1525,20 @@ static void btp_gatt_handler(uint8_t opcode, uint8_t controller_index, uint16_t
                 gatt_client_write_long_value_of_characteristic(&gatt_client_packet_handler, remote_handle, value_handle, value_length, value_buffer);
             }
             break;
+        case BTP_GATT_OP_WRITE_RELIABLE:
+        MESSAGE("BTP_GATT_OP_WRITE_RELIABLE");
+            response_len = 0;
+            response_service_id = BTP_SERVICE_ID_GATT;
+            response_op = opcode;
+            if (controller_index == 0){
+                uint16_t value_handle = little_endian_read_16(data, 7);
+                uint16_t value_offset = little_endian_read_16(data, 9);
+                uint16_t value_length = little_endian_read_16(data, 11);
+                memcpy(value_buffer,  &data[13], value_length);
+                UNUSED(value_offset); // offset not supported by gatt client
+                gatt_client_reliable_write_long_value_of_characteristic(&gatt_client_packet_handler, remote_handle, value_handle, value_length, value_buffer);
+            }
+
         case BTP_GATT_OP_CFG_NOTIFY:
             MESSAGE("BTP_GATT_OP_CFG_NOTIFY");
             response_len = 0;