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 73535807692f..8b7c679ba41d 100644
--- a/spec/02-integration/18-hybrid_rpc/01-rpc_spec.lua
+++ b/spec/02-integration/18-hybrid_rpc/01-rpc_spec.lua
@@ -1,7 +1,8 @@
 local helpers = require "spec.helpers"
 local cjson = require("cjson.safe")
 
-for _, inc_sync in ipairs { "on", "off"  } do
+-- we need incremental sync to verify rpc
+for _, inc_sync in ipairs { "on"  } do
 for _, strategy in helpers.each_strategy() do
   describe("Hybrid Mode RPC #" .. strategy .. " inc_sync=" .. inc_sync, function()
 
@@ -52,12 +53,13 @@ for _, strategy in helpers.each_strategy() do
 
           assert(json)
 
-          -- TODO: need a new test method
+          -- TODO: perhaps 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)
               assert.near(14 * 86400, v.ttl, 3)
-              -- TODO: check the available rpc service
+              -- check the available rpc service
+              assert.same("kong.sync.v2", v.rpc_capabilities[1])
               return true
             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 600a8872f995..1f681ebe633e 100644
--- a/spec/02-integration/18-hybrid_rpc/04-concentrator_spec.lua
+++ b/spec/02-integration/18-hybrid_rpc/04-concentrator_spec.lua
@@ -28,7 +28,8 @@ local function obtain_dp_node_id()  -- luacheck: ignore
 end
 
 
-for _, inc_sync in ipairs { "on", "off"  } do
+-- we need incremental sync to verify rpc
+for _, inc_sync in ipairs { "on"  } do
 for _, strategy in helpers.each_strategy() do
   describe("Hybrid Mode RPC over DB concentrator #" .. strategy .. " inc_sync=" .. inc_sync, function()