diff --git a/tests-pl/iso-conformity-tests.pl b/tests-pl/iso-conformity-tests.pl
index 40242fca..630b2baa 100644
--- a/tests-pl/iso-conformity-tests.pl
+++ b/tests-pl/iso-conformity-tests.pl
@@ -753,12 +753,12 @@ test_194 :- op(0,xfy,.),
 test_170 :- set_prolog_flag(double_quotes,chars).
 
 test_171 :- writeq_term_to_chars("a", C),
-            C == "\"a\"".
+            C == "[a]".
 
 test_229 :- test_syntax_error("\"\\z.\"", syntax_error(missing_quote)).
 
 test_300 :- writeq_term_to_chars("\0\", C),
-            C == "\"\\x0\\\"".
+            C == "['\\x0\\']".
 
 test_172 :- X is 10.0** -323,
             writeq_term_to_chars(X, C),