tests.patch

diff --git a/examples/t/async_request.t b/examples/t/async_request.t
index 3d09ddd5..88b1e37e 100644
--- a/examples/t/async_request.t
+++ b/examples/t/async_request.t
@@ -21,7 +21,7 @@ use Test::Nginx;
 select STDERR; $| = 1;
 select STDOUT; $| = 1;
 
-my $t = Test::Nginx->new()->has(qw/http/)->plan(1)
+my $t = Test::Nginx->new()->has(qw/http proxy/)->plan(2)
 	->write_file_expand('nginx.conf', <<"EOF");
 
 %%TEST_GLOBALS%%
@@ -40,6 +40,12 @@ http {
 
         location / {
             async_request on;
+            async_uri /proxy;
+        }
+
+        location /non_existing {
+            async_request on;
+            async_uri /non_existing_upstream;
         }
 
         location /proxy {
@@ -63,4 +69,6 @@ EOF
 $t->write_file('index.html', '');
 $t->run();
 
-like(http_get('/'), qr/200 OK.*Hello from backend/s, 'async subrequest works');
+like(http_get('/'), qr/200 OK.*Hello from backend/s, 'async subrequest');
+like(http_get('/non_existing'), qr/404 Not Found/s,
+	'async subrequest to non-existing upstream');
diff --git a/nginx-src/nginx b/nginx-src/nginx
index 073ed332..481d28cb 160000
--- a/nginx-src/nginx
+++ b/nginx-src/nginx
@@ -1 +1 @@
-Subproject commit 073ed33202286a975964c3a08f522bf01dc6fecf
+Subproject commit 481d28cb4e04c8096b9b6134856891dc52ecc68f