new file mode 100644
--- /dev/null
+++ b/upstream_zone_ssl.t
@@ -0,0 +1,123 @@
+#!/usr/bin/perl
+
+# (C) Sergey Kandaurov
+# (C) Nginx, Inc.
+
+# Tests for upstream zone with ssl backend.
+
+###############################################################################
+
+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;
+
+my $t = Test::Nginx->new()->has(qw/http proxy http_ssl upstream_zone/)
+	->has_daemon('openssl')->write_file_expand('nginx.conf', <<'EOF');
+
+%%TEST_GLOBALS%%
+
+daemon off;
+
+events {
+}
+
+http {
+    %%TEST_GLOBALS_HTTP%%
+
+    upstream u {
+        zone u 32k;
+        server 127.0.0.1:8081;
+    }
+
+    upstream u2 {
+        zone u;
+        server 127.0.0.1:8081 backup;
+        server 127.0.0.1:8082 down;
+    }
+
+    server {
+        listen 127.0.0.1:8081 ssl;
+
+        ssl_certificate_key localhost.key;
+        ssl_certificate localhost.crt;
+        ssl_session_cache builtin;
+
+        location / {
+            add_header X-Session $ssl_session_reused;
+        }
+    }
+
+    server {
+        listen       127.0.0.1:8080;
+        server_name  localhost;
+
+        proxy_ssl_session_reuse off;
+
+        location /ssl_reuse {
+            proxy_pass https://u/;
+            proxy_ssl_session_reuse on;
+        }
+
+        location /ssl {
+            proxy_pass https://u/;
+        }
+
+        location /backup_reuse {
+            proxy_pass https://u2/;
+            proxy_ssl_session_reuse on;
+        }
+
+        location /backup {
+            proxy_pass https://u2/;
+        }
+    }
+}
+
+EOF
+
+$t->write_file('openssl.conf', <<EOF);
+[ req ]
+default_bits = 2048
+encrypt_key = no
+distinguished_name = req_distinguished_name
+[ req_distinguished_name ]
+EOF
+
+$t->write_file('index.html', '');
+
+my $d = $t->testdir();
+
+foreach my $name ('localhost') {
+	system('openssl req -x509 -new '
+		. "-config '$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 upstream zone')->plan(8);
+
+###############################################################################
+
+like(http_get('/ssl'), qr/200 OK.*X-Session: \./s, 'ssl');
+like(http_get('/ssl'), qr/200 OK.*X-Session: \./s, 'ssl 2');
+like(http_get('/ssl_reuse'), qr/200 OK.*X-Session: \./s, 'ssl reuse session');
+like(http_get('/ssl_reuse'), qr/200 OK.*X-Session: r/s, 'ssl reuse session 2');
+
+like(http_get('/backup'), qr/200 OK.*X-Session: \./s, 'backup');
+like(http_get('/backup'), qr/200 OK.*X-Session: \./s, 'backup 2');
+like(http_get('/backup_reuse'), qr/200 OK.*X-Session: \./s, 'backup reuse');
+like(http_get('/backup_reuse'), qr/200 OK.*X-Session: r/s, 'backup reuse 2');
+
+###############################################################################