diff --git a/spec/02-integration/09-hybrid_mode/01-sync_spec.lua b/spec/02-integration/09-hybrid_mode/01-sync_spec.lua
index 5f96f2738506..efcadf8aa46e 100644
--- a/spec/02-integration/09-hybrid_mode/01-sync_spec.lua
+++ b/spec/02-integration/09-hybrid_mode/01-sync_spec.lua
@@ -732,6 +732,8 @@ describe("CP/DP config sync #" .. strategy .. " inc_sync=" .. inc_sync, function
         end
       end, 5)
 
+      ngx.sleep(0.5)
+
       for i = 5, 2, -1 do
         res = proxy_client:get("/" .. i)
         assert.res_status(404, res)