diff --git a/mail_ssl_conf_command.t b/mail_ssl_conf_command.t
new file mode 100644
index 0000000..5948feb
--- /dev/null
+++ b/mail_ssl_conf_command.t
@@ -0,0 +1,120 @@
+#!/usr/bin/perl
+
+# (C) Sergey Kandaurov
+# (C) Nginx, Inc.
+
+# Tests for mail ssl module, ssl_conf_command.
+
+###############################################################################
+
+use warnings;
+use strict;
+
+use Test::More;
+
+BEGIN { use FindBin; chdir($FindBin::Bin); }
+
+use lib 'lib';
+use Test::Nginx;
+
+###############################################################################
+
+select STDERR; $| = 1;
+select STDOUT; $| = 1;
+
+eval {
+	require Net::SSLeay;
+	Net::SSLeay::load_error_strings();
+	Net::SSLeay::SSLeay_add_ssl_algorithms();
+	Net::SSLeay::randomize();
+};
+plan(skip_all => 'Net::SSLeay not installed') if $@;
+
+my $t = Test::Nginx->new()->has(qw/mail mail_ssl imap/)
+	->has_daemon('openssl');
+
+$t->write_file_expand('nginx.conf', <<'EOF');
+
+%%TEST_GLOBALS%%
+
+daemon off;
+
+events {
+}
+
+mail {
+    auth_http  http://127.0.0.1:8080;   # unused
+
+    server {
+        listen       127.0.0.1:8443 ssl;
+        protocol     imap;
+
+        ssl_protocols TLSv1.2;
+
+        ssl_session_tickets off;
+        ssl_conf_command Options SessionTicket;
+
+        ssl_prefer_server_ciphers on;
+        ssl_conf_command Options -ServerPreference;
+        ssl_ciphers ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256;
+
+        ssl_certificate localhost.crt;
+        ssl_certificate_key localhost.key;
+        ssl_conf_command Certificate override.crt;
+        ssl_conf_command PrivateKey override.key;
+    }
+}
+
+EOF
+
+$t->write_file('openssl.conf', <<EOF);
+[ req ]
+default_bits = 2048
+encrypt_key = no
+distinguished_name = req_distinguished_name
+[ req_distinguished_name ]
+EOF
+
+my $d = $t->testdir();
+
+foreach my $name ('localhost', 'override') {
+	system('openssl req -x509 -new '
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
+		. ">>$d/openssl.out 2>&1") == 0
+		or die "Can't create certificate for $name: $!\n";
+}
+
+$t->try_run('no ssl_conf_command')->plan(3);
+
+###############################################################################
+
+my $ctx = Net::SSLeay::CTX_new() or die("Failed to create SSL_CTX $!");
+
+my ($s, $ssl) = get_ssl_socket();
+like(Net::SSLeay::dump_peer_certificate($ssl), qr/CN=override/, 'Certificate');
+
+my $ses = Net::SSLeay::get_session($ssl);
+($s, $ssl) = get_ssl_socket(ses => $ses);
+ok(Net::SSLeay::session_reused($ssl), 'SessionTicket');
+
+($s, $ssl) = get_ssl_socket(ciphers =>
+	'ECDHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384');
+is(Net::SSLeay::get_cipher($ssl),
+	'ECDHE-RSA-AES128-GCM-SHA256', 'ServerPreference');
+
+###############################################################################
+
+sub get_ssl_socket {
+	my (%extra) = @_;
+
+	my $s = IO::Socket::INET->new('127.0.0.1:' . port(8443));
+	my $ssl = Net::SSLeay::new($ctx) or die("Failed to create SSL $!");
+	Net::SSLeay::set_session($ssl, $extra{ses}) if $extra{ses};
+	Net::SSLeay::set_cipher_list($ssl, $extra{ciphers}) if $extra{ciphers};
+	Net::SSLeay::set_fd($ssl, fileno($s));
+	Net::SSLeay::connect($ssl) or die("ssl connect");
+	return ($s, $ssl);
+}
+
+###############################################################################
diff --git a/ssl_conf_command.t b/ssl_conf_command.t
new file mode 100644
index 0000000..a90c869
--- /dev/null
+++ b/ssl_conf_command.t
@@ -0,0 +1,120 @@
+#!/usr/bin/perl
+
+# (C) Sergey Kandaurov
+# (C) Nginx, Inc.
+
+# Tests for http ssl module, ssl_conf_command.
+
+###############################################################################
+
+use warnings;
+use strict;
+
+use Test::More;
+
+BEGIN { use FindBin; chdir($FindBin::Bin); }
+
+use lib 'lib';
+use Test::Nginx;
+
+###############################################################################
+
+select STDERR; $| = 1;
+select STDOUT; $| = 1;
+
+eval {
+	require Net::SSLeay;
+	Net::SSLeay::load_error_strings();
+	Net::SSLeay::SSLeay_add_ssl_algorithms();
+	Net::SSLeay::randomize();
+};
+plan(skip_all => 'Net::SSLeay not installed') if $@;
+
+my $t = Test::Nginx->new()->has(qw/http http_ssl/)
+	->has_daemon('openssl');
+
+$t->write_file_expand('nginx.conf', <<'EOF');
+
+%%TEST_GLOBALS%%
+
+daemon off;
+
+events {
+}
+
+http {
+    %%TEST_GLOBALS_HTTP%%
+
+    server {
+        listen       127.0.0.1:8443 ssl;
+        server_name  localhost;
+
+        ssl_protocols TLSv1.2;
+
+        ssl_session_tickets off;
+        ssl_conf_command Options SessionTicket;
+
+        ssl_prefer_server_ciphers on;
+        ssl_conf_command Options -ServerPreference;
+        ssl_ciphers ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256;
+
+        ssl_certificate localhost.crt;
+        ssl_certificate_key localhost.key;
+        ssl_conf_command Certificate override.crt;
+        ssl_conf_command PrivateKey override.key;
+    }
+}
+
+EOF
+
+$t->write_file('openssl.conf', <<EOF);
+[ req ]
+default_bits = 2048
+encrypt_key = no
+distinguished_name = req_distinguished_name
+[ req_distinguished_name ]
+EOF
+
+my $d = $t->testdir();
+
+foreach my $name ('localhost', 'override') {
+	system('openssl req -x509 -new '
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
+		. ">>$d/openssl.out 2>&1") == 0
+		or die "Can't create certificate for $name: $!\n";
+}
+
+$t->try_run('no ssl_conf_command')->plan(3);
+
+###############################################################################
+
+my $ctx = Net::SSLeay::CTX_new() or die("Failed to create SSL_CTX $!");
+
+my ($s, $ssl) = get_ssl_socket();
+like(Net::SSLeay::dump_peer_certificate($ssl), qr/CN=override/, 'Certificate');
+
+my $ses = Net::SSLeay::get_session($ssl);
+($s, $ssl) = get_ssl_socket(ses => $ses);
+ok(Net::SSLeay::session_reused($ssl), 'SessionTicket');
+
+($s, $ssl) = get_ssl_socket(ciphers =>
+	'ECDHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384');
+is(Net::SSLeay::get_cipher($ssl),
+	'ECDHE-RSA-AES128-GCM-SHA256', 'ServerPreference');
+
+###############################################################################
+
+sub get_ssl_socket {
+	my (%extra) = @_;
+
+	my $s = IO::Socket::INET->new('127.0.0.1:' . port(8443));
+	my $ssl = Net::SSLeay::new($ctx) or die("Failed to create SSL $!");
+	Net::SSLeay::set_session($ssl, $extra{ses}) if $extra{ses};
+	Net::SSLeay::set_cipher_list($ssl, $extra{ciphers}) if $extra{ciphers};
+	Net::SSLeay::set_fd($ssl, fileno($s));
+	Net::SSLeay::connect($ssl) or die("ssl connect");
+	return ($s, $ssl);
+}
+
+###############################################################################
diff --git a/stream_ssl_conf_command.t b/stream_ssl_conf_command.t
new file mode 100644
index 0000000..d0b0ff0
--- /dev/null
+++ b/stream_ssl_conf_command.t
@@ -0,0 +1,118 @@
+#!/usr/bin/perl
+
+# (C) Sergey Kandaurov
+# (C) Nginx, Inc.
+
+# Tests for stream ssl module, ssl_conf_command.
+
+###############################################################################
+
+use warnings;
+use strict;
+
+use Test::More;
+
+BEGIN { use FindBin; chdir($FindBin::Bin); }
+
+use lib 'lib';
+use Test::Nginx;
+
+###############################################################################
+
+select STDERR; $| = 1;
+select STDOUT; $| = 1;
+
+eval {
+	require Net::SSLeay;
+	Net::SSLeay::load_error_strings();
+	Net::SSLeay::SSLeay_add_ssl_algorithms();
+	Net::SSLeay::randomize();
+};
+plan(skip_all => 'Net::SSLeay not installed') if $@;
+
+my $t = Test::Nginx->new()->has(qw/stream stream_ssl stream_return/)
+	->has_daemon('openssl');
+
+$t->write_file_expand('nginx.conf', <<'EOF');
+
+%%TEST_GLOBALS%%
+
+daemon off;
+
+events {
+}
+
+stream {
+    server {
+        listen       127.0.0.1:8443 ssl;
+        return       OK;
+
+        ssl_protocols TLSv1.2;
+
+        ssl_session_tickets off;
+        ssl_conf_command Options SessionTicket;
+
+        ssl_prefer_server_ciphers on;
+        ssl_conf_command Options -ServerPreference;
+        ssl_ciphers ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256;
+
+        ssl_certificate localhost.crt;
+        ssl_certificate_key localhost.key;
+        ssl_conf_command Certificate override.crt;
+        ssl_conf_command PrivateKey override.key;
+    }
+}
+
+EOF
+
+$t->write_file('openssl.conf', <<EOF);
+[ req ]
+default_bits = 2048
+encrypt_key = no
+distinguished_name = req_distinguished_name
+[ req_distinguished_name ]
+EOF
+
+my $d = $t->testdir();
+
+foreach my $name ('localhost', 'override') {
+	system('openssl req -x509 -new '
+		. "-config $d/openssl.conf -subj /CN=$name/ "
+		. "-out $d/$name.crt -keyout $d/$name.key "
+		. ">>$d/openssl.out 2>&1") == 0
+		or die "Can't create certificate for $name: $!\n";
+}
+
+$t->try_run('no ssl_conf_command')->plan(3);
+
+###############################################################################
+
+my $ctx = Net::SSLeay::CTX_new() or die("Failed to create SSL_CTX $!");
+
+my ($s, $ssl) = get_ssl_socket();
+like(Net::SSLeay::dump_peer_certificate($ssl), qr/CN=override/, 'Certificate');
+
+my $ses = Net::SSLeay::get_session($ssl);
+($s, $ssl) = get_ssl_socket(ses => $ses);
+ok(Net::SSLeay::session_reused($ssl), 'SessionTicket');
+
+($s, $ssl) = get_ssl_socket(ciphers =>
+	'ECDHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384');
+is(Net::SSLeay::get_cipher($ssl),
+	'ECDHE-RSA-AES128-GCM-SHA256', 'ServerPreference');
+
+###############################################################################
+
+sub get_ssl_socket {
+	my (%extra) = @_;
+
+	my $s = IO::Socket::INET->new('127.0.0.1:' . port(8443));
+	my $ssl = Net::SSLeay::new($ctx) or die("Failed to create SSL $!");
+	Net::SSLeay::set_session($ssl, $extra{ses}) if $extra{ses};
+	Net::SSLeay::set_cipher_list($ssl, $extra{ciphers}) if $extra{ciphers};
+	Net::SSLeay::set_fd($ssl, fileno($s));
+	Net::SSLeay::connect($ssl) or die("ssl connect");
+	return ($s, $ssl);
+}
+
+###############################################################################