diff --git a/contrib/netbsd-tests/lib/libc/regex/t_regex_att.c b/contrib/netbsd-tests/lib/libc/regex/t_regex_att.c
index 1873e853750a..0ca44b47577e 100644
--- a/contrib/netbsd-tests/lib/libc/regex/t_regex_att.c
+++ b/contrib/netbsd-tests/lib/libc/regex/t_regex_att.c
@@ -631,7 +631,7 @@ ATF_TP_ADD_TCS(tp)
 	ATF_TP_ADD_TC(tp, basic);
 	ATF_TP_ADD_TC(tp, categorization);
 	ATF_TP_ADD_TC(tp, nullsubexpr);
-//	ATF_TP_ADD_TC(tp, leftassoc);
+	ATF_TP_ADD_TC(tp, leftassoc);
 	ATF_TP_ADD_TC(tp, rightassoc);
 	ATF_TP_ADD_TC(tp, forcedassoc);
 	ATF_TP_ADD_TC(tp, repetition);