diff --git a/h2_proxy_request_buffering_redirect.t b/h2_proxy_request_buffering_redirect.t
new file mode 100644
index 0000000..06ad92a
--- /dev/null
+++ b/h2_proxy_request_buffering_redirect.t
@@ -0,0 +1,92 @@
+#!/usr/bin/perl
+
+# (C) Sergey Kandaurov
+# (C) Nginx, Inc.
+
+# Tests for HTTP/2 protocol with unbuffered request body.
+
+###############################################################################
+
+use warnings;
+use strict;
+
+use Test::More;
+
+BEGIN { use FindBin; chdir($FindBin::Bin); }
+
+use lib 'lib';
+use Test::Nginx;
+use Test::Nginx::HTTP2;
+
+###############################################################################
+
+select STDERR; $| = 1;
+select STDOUT; $| = 1;
+
+my $t = Test::Nginx->new()->has(qw/http http_v2 proxy rewrite/)->plan(1);
+
+$t->write_file_expand('nginx.conf', <<'EOF')->run();
+
+%%TEST_GLOBALS%%
+
+daemon off;
+
+events {
+}
+
+http {
+    %%TEST_GLOBALS_HTTP%%
+
+    server {
+        listen       127.0.0.1:8080 http2;
+        listen       127.0.0.1:8081;
+        server_name  localhost;
+
+        proxy_http_version 1.1;
+
+        location / {
+            proxy_request_buffering off;
+            proxy_pass http://127.0.0.1:8081/bad;
+            proxy_intercept_errors on;
+            error_page 502 = /pass;
+        }
+
+        location /bad {
+            return 502;
+        }
+
+        location /pass {
+            proxy_pass http://127.0.0.1:8081/good;
+        }
+
+        location /good {
+            limit_rate 100;
+            return 200;
+        }
+    }
+}
+
+EOF
+
+###############################################################################
+
+# unbuffered request body
+
+TODO: {
+todo_skip 'leaves coredump', 1 unless $ENV{TEST_NGINX_UNSAFE}
+	or $t->has_version('1.17.4');
+
+my $s = Test::Nginx::HTTP2->new();
+my $sid = $s->new_stream({ body_more => 1 });
+
+$s->h2_body('SEE-', { body_more => 1 });
+sleep 1;
+$s->h2_body('THIS');
+
+my $frames = $s->read(all => [{ sid => $sid, fin => 1 }]);
+my ($frame) = grep { $_->{type} eq "HEADERS" } @$frames;
+is($frame->{headers}->{':status'}, 200, 'discard body rest on redirect');
+
+}
+
+###############################################################################