t/content_id.t | 8 ++++----

diff --git a/t/content_id.t b/t/content_id.t
index 01ce65e5f264b4cff889b8f730943d254d936f90..990eabe16b1934dd17fd79e720ea7fe9c9fd47ef 100644
--- a/t/content_id.t
+++ b/t/content_id.t
@@ -23,11 +23,11 @@ my $reload = content_id(Email::MIME->new($mime->as_string));
 is($orig, $reload, 'content_id matches after serialization');
 
 foreach my $h (qw(From To Cc)) {
-	my $n = '"Quoted N\'Ame" <foo@EXAMPLE.com>';
-	$mime->header_str_set($h, "$n");
+	my $n = q("Quoted N'Ame" <foo@EXAMPLE.com>);
+	$mime->header_set($h, "$n");
 	my $q = content_id($mime);
-	is($n, $mime->header($h), "content_id does not mutate $h:");
-	$mime->header_str_set($h, 'Quoted N\'Ame <foo@example.com>');
+	is($mime->header($h), $n, "content_id does not mutate $h:");
+	$mime->header_set($h, 'Quoted N\'Ame <foo@example.com>');
 	my $nq = content_id($mime);
 	is($nq, $q, "quotes ignored in $h:");
 }