--- a/lib/Test/Nginx.pm
+++ b/lib/Test/Nginx.pm
@@ -44,10 +44,26 @@ sub DESTROY {
 }
 
 sub has {
-	my ($self, $feature, %options) = @_;
+	my ($self, $feature) = @_;
+
+	my %regex = (
+		mail	=> '--with-mail',
+		rewrite	=> '(?s)^(?!.*--without-http_rewrite_module)',
+		static	=> '(?s)^(?!.*--without-http_static_module)',
+	);
+
 	Test::More::plan(skip_all => "$feature not compiled in")
-		unless `$NGINX -V 2>&1` =~ $feature;
-	Test::More::plan($options{plan}) if defined $options{plan};
+		unless `$NGINX -V 2>&1` =~ $regex{$feature};
+
+	return $self;
+}
+
+sub plan {
+	my ($self, $plan) = @_;
+
+	Test::More::plan(tests => $plan);
+
+	return $self;
 }
 
 sub run {

--- a/smtp-greeting-delay.t
+++ b/smtp-greeting-delay.t
@@ -23,7 +23,7 @@ use Test::Nginx::SMTP;
 select STDERR; $| = 1;
 select STDOUT; $| = 1;
 
-my $t = Test::Nginx->new()->has('mail', plan => 2)
+my $t = Test::Nginx->new()->has('mail')->plan(2)
 	->write_file_expand('nginx.conf', <<'EOF')->run();
 
 master_process off;

--- a/smtp.t
+++ b/smtp.t
@@ -26,7 +26,7 @@ select STDERR; $| = 1;
 select STDOUT; $| = 1;
 
 my $t = Test::Nginx->new()
-	->has('mail', plan => 26)
+	->has('mail')->plan(26)
 	->run_daemon(\&Test::Nginx::SMTP::smtp_test_daemon)
 	->write_file_expand('nginx.conf', <<'EOF')->run();
 

--- a/ssi-include-big.t
+++ b/ssi-include-big.t
@@ -9,7 +9,7 @@
 use warnings;
 use strict;
 
-use Test::More tests => 3;
+use Test::More;
 
 BEGIN { use FindBin; chdir($FindBin::Bin); }
 
@@ -21,7 +21,7 @@ use Test::Nginx;
 select STDERR; $| = 1;
 select STDOUT; $| = 1;
 
-my $t = Test::Nginx->new();
+my $t = Test::Nginx->has('rewrite')->plan(3)->new();
 
 $t->write_file_expand('nginx.conf', <<'EOF');