diff --git a/tests/lua53/strings.lua b/tests/lua53/strings.lua
index 6a05cf6..b1f118a 100644
--- a/tests/lua53/strings.lua
+++ b/tests/lua53/strings.lua
@@ -187,6 +187,7 @@ do  -- tests for '%p' format
 
   do     -- long strings aren't internalized
     local s1 = string.rep("a", 300); local s2 = string.rep("a", 300)
+    -- FIXME
     --assert(string.format("%p", s1) ~= string.format("%p", s2))
   end
 end