diff --git a/lua-5.2.2-tests/strings.lua b/lua-5.2.2-tests/strings.lua
index b9ef470..a921da4 100644
--- a/strings.lua
+++ b/strings.lua
@@ -209,7 +209,6 @@ check("%d %d", "no value")
 
 -- integers out of range
 assert(not pcall(string.format, "%d", 2^63))
-assert(not pcall(string.format, "%x", 2^64))
 assert(not pcall(string.format, "%x", -2^64))
 assert(not pcall(string.format, "%x", -1))