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 6b717e293cbf..8f670a0388e1 100644
--- a/spec/02-integration/18-hybrid_rpc/01-rpc_spec.lua
+++ b/spec/02-integration/18-hybrid_rpc/01-rpc_spec.lua
@@ -2,10 +2,9 @@ local helpers = require "spec.helpers"
 local cjson = require("cjson.safe")
 local CLUSTERING_SYNC_STATUS = require("kong.constants").CLUSTERING_SYNC_STATUS
 
--- we need incremental sync to verify rpc
-for _, inc_sync in ipairs { "on" } do
+-- register a test rpc service in custom plugin rpc-hello-test
 for _, strategy in helpers.each_strategy() do
-  describe("Hybrid Mode RPC #" .. strategy .. " inc_sync=" .. inc_sync, function()
+  describe("Hybrid Mode RPC #" .. strategy, function()
 
     lazy_setup(function()
       helpers.get_db_utils(strategy, {
@@ -20,7 +19,8 @@ for _, strategy in helpers.each_strategy() do
         cluster_listen = "127.0.0.1:9005",
         nginx_conf = "spec/fixtures/custom_nginx.template",
         cluster_rpc = "on",
-        cluster_incremental_sync = inc_sync, -- incremental sync
+        plugins = "bundled,rpc-hello-test",
+        cluster_incremental_sync = "off",
       }))
 
       assert(helpers.start_kong({
@@ -33,7 +33,8 @@ for _, strategy in helpers.each_strategy() do
         proxy_listen = "0.0.0.0:9002",
         nginx_conf = "spec/fixtures/custom_nginx.template",
         cluster_rpc = "on",
-        cluster_incremental_sync = inc_sync, -- incremental sync
+        plugins = "bundled,rpc-hello-test",
+        cluster_incremental_sync = "off",
       }))
     end)
 
@@ -69,9 +70,13 @@ for _, strategy in helpers.each_strategy() do
               assert(tonumber(m[2]) >= 9)
 
               -- check the available rpc service
-              table.sort(v.rpc_capabilities)
-              assert.same("kong.sync.v2", v.rpc_capabilities[1])
-              return true
+              for _, c in ipairs(v.rpc_capabilities) do
+                if c == "kong.test" then
+                  return true
+                end
+              end
+
+              return false
             end
           end
         end, 10)
@@ -79,4 +84,3 @@ for _, strategy in helpers.each_strategy() do
     end)
   end)
 end -- for _, strategy
-end -- for inc_sync
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 f88e0bba8aa1..445bcee6ec12 100644
--- a/spec/02-integration/18-hybrid_rpc/04-concentrator_spec.lua
+++ b/spec/02-integration/18-hybrid_rpc/04-concentrator_spec.lua
@@ -28,10 +28,9 @@ local function obtain_dp_node_id()  -- luacheck: ignore
 end
 
 
--- we need incremental sync to verify rpc
-for _, inc_sync in ipairs { "on" } do
+-- register a test rpc service in custom plugin rpc-hello-test
 for _, strategy in helpers.each_strategy() do
-  describe("Hybrid Mode RPC over DB concentrator #" .. strategy .. " inc_sync=" .. inc_sync, function()
+  describe("Hybrid Mode RPC over DB concentrator #" .. strategy, function()
 
     lazy_setup(function()
       helpers.get_db_utils(strategy, {
@@ -47,7 +46,8 @@ for _, strategy in helpers.each_strategy() do
         admin_listen = "127.0.0.1:" .. helpers.get_available_port(),
         nginx_conf = "spec/fixtures/custom_nginx.template",
         cluster_rpc = "on",
-        cluster_incremental_sync = inc_sync, -- incremental sync
+        plugins = "bundled,rpc-hello-test",
+        cluster_incremental_sync = "off",
       }))
 
       assert(helpers.start_kong({
@@ -59,7 +59,8 @@ for _, strategy in helpers.each_strategy() do
         cluster_listen = "127.0.0.1:" .. helpers.get_available_port(),
         nginx_conf = "spec/fixtures/custom_nginx.template",
         cluster_rpc = "on",
-        cluster_incremental_sync = inc_sync, -- incremental sync
+        plugins = "bundled,rpc-hello-test",
+        cluster_incremental_sync = "off",
       }))
 
       assert(helpers.start_kong({
@@ -72,7 +73,8 @@ for _, strategy in helpers.each_strategy() do
         proxy_listen = "0.0.0.0:9002",
         nginx_conf = "spec/fixtures/custom_nginx.template",
         cluster_rpc = "on",
-        cluster_incremental_sync = inc_sync, -- incremental sync
+        plugins = "bundled,rpc-hello-test",
+        cluster_incremental_sync = "off",
       }))
     end)
 
@@ -87,4 +89,3 @@ for _, strategy in helpers.each_strategy() do
     --end)
   end)
 end -- for _, strategy
-end -- for inc_sync
diff --git a/spec/fixtures/custom_plugins/kong/plugins/rpc-hello-test/handler.lua b/spec/fixtures/custom_plugins/kong/plugins/rpc-hello-test/handler.lua
new file mode 100644
index 000000000000..7ef7af7a4da4
--- /dev/null
+++ b/spec/fixtures/custom_plugins/kong/plugins/rpc-hello-test/handler.lua
@@ -0,0 +1,14 @@
+local RpcHelloTestHandler = {
+  VERSION = "1.0",
+  PRIORITY = 1000,
+}
+
+
+function RpcHelloTestHandler:init_worker()
+  kong.rpc.callbacks:register("kong.test.hello", function(node_id, greeting)
+    return "hello ".. greeting
+  end)
+end
+
+
+return RpcHelloTestHandler
diff --git a/spec/fixtures/custom_plugins/kong/plugins/rpc-hello-test/schema.lua b/spec/fixtures/custom_plugins/kong/plugins/rpc-hello-test/schema.lua
new file mode 100644
index 000000000000..a11e24948267
--- /dev/null
+++ b/spec/fixtures/custom_plugins/kong/plugins/rpc-hello-test/schema.lua
@@ -0,0 +1,12 @@
+return {
+  name = "rpc-hello-test",
+  fields = {
+    {
+      config = {
+        type = "record",
+        fields = {
+        },
+      },
+    },
+  },
+}