diff --git a/test_regress/t/t_flag_werror_bad2.pl b/test_regress/t/t_flag_werror_bad2.pl
index f30202b04..b0a8e80df 100755
--- a/test_regress/t/t_flag_werror_bad2.pl
+++ b/test_regress/t/t_flag_werror_bad2.pl
@@ -13,7 +13,7 @@ compile (
 	 fails=>$Last_Self->{v3},
 	 verilator_flags=> [qw(-sp -Werror-WIDTH)],
 	 expect=>
-'%Error: t/t_flag_werror.v:\d+: Operator ASSIGNW expects 4 bits on the Assign RHS, but Assign RHS.s CONST generates 6 bits.
+'%Error-WIDTH: t/t_flag_werror.v:\d+: Operator ASSIGNW expects 4 bits on the Assign RHS, but Assign RHS.s CONST generates 6 bits.
 %Error: Exiting due to',
 	 ) if $Last_Self->{v3};