diff --git a/test/app-tap/json.test.lua b/test/app-tap/json.test.lua
index 8b90ccbb761c0f86b2523589936125b9147e2a65..fadfc74eccbe2c8724b3619437a64bd738fe132a 100755
--- a/test/app-tap/json.test.lua
+++ b/test/app-tap/json.test.lua
@@ -22,7 +22,7 @@ end
 
 tap.test("json", function(test)
     local serializer = require('json')
-    test:plan(33)
+    test:plan(40)
 
     test:test("unsigned", common.test_unsigned, serializer)
     test:test("signed", common.test_signed, serializer)