diff --git a/spec/02-integration/18-hybrid_rpc/01-rpc_spec.lua b/spec/02-integration/18-hybrid_rpc/01-rpc_spec.lua
index bdcbd6f1c5fa..73535807692f 100644
--- a/spec/02-integration/18-hybrid_rpc/01-rpc_spec.lua
+++ b/spec/02-integration/18-hybrid_rpc/01-rpc_spec.lua
@@ -50,7 +50,9 @@ for _, strategy in helpers.each_strategy() do
           local body = assert.res_status(200, res)
           local json = cjson.decode(body)
 
-          --[[ TODO: need a new test method
+          assert(json)
+
+          -- TODO: need a new test method
           for _, v in pairs(json.data) do
             if v.ip == "127.0.0.1" and v.rpc_capabilities and #v.rpc_capabilities ~= 0 then
               table.sort(v.rpc_capabilities)
@@ -61,7 +63,6 @@ for _, strategy in helpers.each_strategy() do
           end
 
           return true
-          --]]
         end, 10)
       end)
     end)
diff --git a/spec/02-integration/18-hybrid_rpc/04-concentrator_spec.lua b/spec/02-integration/18-hybrid_rpc/04-concentrator_spec.lua
index 626193e35b49..600a8872f995 100644
--- a/spec/02-integration/18-hybrid_rpc/04-concentrator_spec.lua
+++ b/spec/02-integration/18-hybrid_rpc/04-concentrator_spec.lua
@@ -2,9 +2,8 @@ local helpers = require "spec.helpers"
 local cjson = require("cjson.safe")
 
 
---[[
 -- keep it for future usage
-local function obtain_dp_node_id()
+local function obtain_dp_node_id()  -- luacheck: ignore
   local dp_node_id
 
   helpers.wait_until(function()
@@ -27,7 +26,6 @@ local function obtain_dp_node_id()
 
   return dp_node_id
 end
---]]
 
 
 for _, inc_sync in ipairs { "on", "off"  } do