diff --git a/.github/scripts/openresty-smoke.lua b/.github/scripts/openresty-smoke.lua
index 97f70f5..453ea76 100644
--- a/.github/scripts/openresty-smoke.lua
+++ b/.github/scripts/openresty-smoke.lua
@@ -21,6 +21,27 @@ assert(decoded.field == "value")
 assert(decoded.nested.n == 42)
 assert(decoded.list[1] == true)
 
+local plain_pairs_keys = {}
+local plain_pairs_values = {}
+for k, v in pairs(decoded) do
+    plain_pairs_keys[#plain_pairs_keys + 1] = k
+    plain_pairs_values[k] = v
+end
+assert(#plain_pairs_keys == 3)
+assert(plain_pairs_keys[1] == "field")
+assert(plain_pairs_keys[2] == "nested")
+assert(plain_pairs_keys[3] == "list")
+assert(plain_pairs_values.field == "value")
+assert(plain_pairs_values.nested.n == 42)
+assert(plain_pairs_values.list[1] == true)
+
+local plain_ipairs_values = {}
+for i, v in ipairs(decoded.list) do
+    plain_ipairs_values[i] = v
+end
+assert(#plain_ipairs_values == 1)
+assert(plain_ipairs_values[1] == true)
+
 local encoded = qjson.encode({
     field = "value",
     nested = { n = 42 },