diff --git a/tests/conformance/errors.lua b/tests/conformance/errors.lua
index 7ab7099..b13e7a8 100644
--- a/tests/conformance/errors.lua
+++ b/tests/conformance/errors.lua
@@ -295,8 +295,9 @@ end
 
 
 -- testing syntax limits
+local syntaxdepth = if limitedstack then 200 else 1000
 local function testrep (init, rep)
-  local s = "local a; "..init .. string.rep(rep, 300)
+  local s = "local a; "..init .. string.rep(rep, syntaxdepth)
   local a,b = loadstring(s)
   assert(not a) -- and string.find(b, "syntax levels"))
 end