new file mode 100644
--- /dev/null
+++ b/h3_limit_req.t
@@ -0,0 +1,163 @@
+#!/usr/bin/perl
+
+# (C) Sergey Kandaurov
+# (C) Nginx, Inc.
+
+# Tests for HTTP/3 protocol with limit_req.
+
+###############################################################################
+
+use warnings;
+use strict;
+
+use Test::More;
+
+BEGIN { use FindBin; chdir($FindBin::Bin); }
+
+use lib 'lib';
+use Test::Nginx;
+use Test::Nginx::HTTP3;
+
+###############################################################################
+
+select STDERR; $| = 1;
+select STDOUT; $| = 1;
+
+eval { require Crypt::Misc; die if $Crypt::Misc::VERSION < 0.067; };
+plan(skip_all => 'CryptX version >= 0.067 required') if $@;
+
+my $t = Test::Nginx->new()->has(qw/http http_v3 proxy limit_req/)
+	->has_daemon('openssl')->plan(6);
+
+$t->write_file_expand('nginx.conf', <<'EOF');
+
+%%TEST_GLOBALS%%
+
+daemon off;
+
+events {
+}
+
+http {
+    %%TEST_GLOBALS_HTTP%%
+
+    ssl_certificate_key localhost.key;
+    ssl_certificate localhost.crt;
+
+    limit_req_zone   $binary_remote_addr  zone=req:1m rate=1r/s;
+
+    log_format test $status;
+
+    server {
+        listen       127.0.0.1:%%PORT_8980_UDP%% quic;
+        listen       127.0.0.1:8081;
+        server_name  localhost;
+
+        location / {
+            add_header X-Body $request_body;
+            add_header X-Body-File $request_body_file;
+            client_body_in_file_only on;
+            proxy_pass http://127.0.0.1:8081/stub;
+            limit_req  zone=req burst=2;
+            access_log %%TESTDIR%%/test.log test;
+        }
+
+        location /stub { }
+    }
+}
+
+EOF
+
+$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') {
+	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->write_file('stub', '');
+$t->run();
+
+###############################################################################
+
+# request body delayed in limit_req
+
+my $s = Test::Nginx::HTTP3->new();
+my $sid = $s->new_stream({ path => '/', body_more => 1 });
+$s->h3_body('TEST', $sid);
+my $frames = $s->read(all => [{ sid => $sid, fin => 1 }]);
+
+my ($frame) = grep { $_->{type} eq "HEADERS" } @$frames;
+is(read_body_file($frame->{headers}->{'x-body-file'}), 'TEST',
+	'request body - limit req');
+
+$s = Test::Nginx::HTTP3->new();
+$sid = $s->new_stream({ path => '/', body_more => 1 });
+select undef, undef, undef, 1.1;
+$s->h3_body('TEST', $sid);
+$frames = $s->read(all => [{ sid => $sid, fin => 1 }]);
+
+($frame) = grep { $_->{type} eq "HEADERS" } @$frames;
+is(read_body_file($frame->{headers}->{'x-body-file'}), 'TEST',
+	'request body - limit req - limited');
+
+# request body with request
+
+$s = Test::Nginx::HTTP3->new();
+$sid = $s->new_stream({ path => '/', body => 'TEST2' });
+select undef, undef, undef, 1.1;
+$frames = $s->read(all => [{ sid => $sid, fin => 1 }]);
+
+($frame) = grep { $_->{type} eq "HEADERS" } @$frames;
+is(read_body_file($frame->{headers}->{'x-body-file'}), 'TEST2',
+	'request body - limit req - with headers');
+
+# delayed with an empty DATA frame
+
+$s = Test::Nginx::HTTP3->new();
+$sid = $s->new_stream({ path => '/', body_more => 1 });
+$s->h3_body('', $sid);
+select undef, undef, undef, 1.1;
+$frames = $s->read(all => [{ sid => $sid, fin => 1 }]);
+
+($frame) = grep { $_->{type} eq "HEADERS" } @$frames;
+is($frame->{headers}->{':status'}, 200, 'request body - limit req - empty');
+
+# detect RESET_STREAM while request is delayed
+
+$s = Test::Nginx::HTTP3->new();
+$sid = $s->new_stream({ path => '/', body_more => 1 });
+$s->reset_stream($sid, 0x010c);
+$frames = $s->read(all => [{ type => 'DECODER_C' }]);
+
+($frame) = grep { $_->{type} eq "DECODER_C" } @$frames;
+is($frame->{'val'}, $sid, 'reset stream - cancellation');
+
+$t->stop();
+
+like($t->read_file('test.log'), qr/499/, 'reset stream - log');
+
+###############################################################################
+
+sub read_body_file {
+	my ($path) = @_;
+	return unless $path;
+	open FILE, $path or return "$!";
+	local $/;
+	my $content = <FILE>;
+	close FILE;
+	return $content;
+}
+
+###############################################################################