diff --git a/access_log_none.t b/access_log_none.t
new file mode 100644
index 0000000..c968b9c
--- /dev/null
+++ b/access_log_none.t
@@ -0,0 +1,60 @@
+#!/usr/bin/perl
+
+# (C) Sergey Kandaurov
+# (C) Nginx, Inc.
+
+# Tests for access_log with escape parameter.
+
+###############################################################################
+
+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/)
+	->write_file_expand('nginx.conf', <<'EOF');
+
+%%TEST_GLOBALS%%
+
+daemon off;
+
+events {
+}
+
+http {
+    %%TEST_GLOBALS_HTTP%%
+
+    log_format none     escape=none     $arg_a$arg_b$arg_c;
+
+    server {
+        listen       127.0.0.1:8080;
+        server_name  localhost;
+
+        access_log %%TESTDIR%%/none.log none;
+    }
+}
+
+EOF
+
+$t->try_run('no escape=none')->plan(1);
+
+###############################################################################
+
+http_get('/?a="1 \\ ' . pack("n", 0x1b1c) . ' "&c=2');
+
+$t->stop();
+
+is($t->read_file('none.log'), '"1 \\ ' . pack("n", 0x1b1c) . " \"2\n", 'none');
+
+###############################################################################
diff --git a/stream_access_log_none.t b/stream_access_log_none.t
new file mode 100644
index 0000000..c946db5
--- /dev/null
+++ b/stream_access_log_none.t
@@ -0,0 +1,65 @@
+#!/usr/bin/perl
+
+# (C) Sergey Kandaurov
+# (C) Nginx, Inc.
+
+# Stream tests for access_log with escape parameter.
+
+###############################################################################
+
+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/stream stream_map stream_return/)
+	->write_file_expand('nginx.conf', <<'EOF');
+
+%%TEST_GLOBALS%%
+
+daemon off;
+
+events {
+}
+
+stream {
+    map $pid $a {
+        default '" \ "';
+    }
+    map $pid $b {
+        default "foo";
+    }
+
+    log_format none     escape=none     $a$b$upstream_addr;
+
+    server {
+        listen       127.0.0.1:8080;
+        return       ok;
+
+        access_log %%TESTDIR%%/none.log none;
+    }
+}
+
+EOF
+
+$t->try_run('no escape=none')->plan(1);
+
+###############################################################################
+
+http_get('/');
+
+$t->stop();
+
+is($t->read_file('none.log'), '" \\ "foo' . "\n", 'none');
+
+###############################################################################