--- a/proxy_cache_range.t
+++ b/proxy_cache_range.t
@@ -21,7 +21,7 @@ use Test::Nginx;
 select STDERR; $| = 1;
 select STDOUT; $| = 1;
 
-my $t = Test::Nginx->new()->has(qw/http proxy cache shmem/)->plan(6)
+my $t = Test::Nginx->new()->has(qw/http proxy cache shmem/)->plan(7)
 	->write_file_expand('nginx.conf', <<'EOF');
 
 %%TEST_GLOBALS%%
@@ -59,6 +59,9 @@ http {
         server_name  localhost;
 
         location / {
+            if ($arg_s) {
+                limit_rate 50k;
+            }
         }
     }
 }
@@ -66,6 +69,12 @@ http {
 EOF
 
 $t->write_file('t.html', 'SEE-THIS');
+
+# should not fit in a single proxy buffer
+
+$t->write_file('tbig.html',
+	join('', map { sprintf "XX%06dXX", $_ } (1 .. 7000)));
+
 $t->run();
 
 ###############################################################################
@@ -91,6 +100,15 @@ like(http_get_range('/min_uses/t.html?3'
 like(http_get_range('/min_uses/t.html?4', 'Range: bytes=0-2,4-'),
 	qr/^SEE.*^THIS/ms, 'multipart range below min_uses');
 
+TODO: {
+local $TODO = 'not yet' if $t->read_file('nginx.conf') =~ /sendfile on/
+	and $t->read_file('nginx.conf') =~ /aio threads/ and $^O eq 'linux';
+
+like(http_get_range('/tbig.html?s=1', 'Range: bytes=0-19'),
+	qr/^XX000001XXXX000002XX$/ms, 'range of response received in parts');
+
+}
+
 ###############################################################################
 
 sub http_get_range {