--- a/contrib/ltree_plpython/expected/ltree_plpython.out
+++ b/contrib/ltree_plpython/expected/ltree_plpython.out
@@ -39,5 +39,6 @@ $$;
 -- string.
 SELECT test2();
 ERROR:  ltree syntax error at character 1
+DETAIL:  Unexpected character
 CONTEXT:  while creating return value
 PL/Python function "test2"