new file mode 100644
--- /dev/null
+++ b/js_var.t
@@ -0,0 +1,90 @@
+#!/usr/bin/perl
+
+# (C) Dmitry Volyntsev
+# (C) Nginx, Inc.
+
+# Tests for http njs module, js_var directive.
+
+###############################################################################
+
+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 rewrite/)
+	->write_file_expand('nginx.conf', <<'EOF');
+
+%%TEST_GLOBALS%%
+
+daemon off;
+
+events {
+}
+
+http {
+    %%TEST_GLOBALS_HTTP%%
+
+    js_import test.js;
+
+    js_var $foo;
+    js_var $bar a:$arg_a;
+
+    server {
+        listen       127.0.0.1:8080;
+        server_name  localhost;
+
+        location /test {
+            js_content test.test;
+        }
+
+        location /sub {
+            return 200 DONE;
+        }
+
+        location /dest {
+            return 200 $bar;
+        }
+    }
+}
+
+EOF
+
+$t->write_file('test.js', <<EOF);
+    function test(r) {
+        if (r.args.sub) {
+            r.subrequest('/sub')
+            .then(reply => {
+                r.variables.bar = reply.responseText;
+                r.internalRedirect('/dest');
+            });
+
+            return;
+        }
+
+        r.return(200, `V:\${r.variables[r.args.var]}`);
+    }
+
+    export default {test};
+
+EOF
+
+$t->try_run('no njs js_var')->plan(3);
+
+###############################################################################
+
+like(http_get('/test?var=bar&a=qq'), qr/200 OK.*V:a:qq$/s, 'default value');
+like(http_get('/test?var=foo'), qr/200 OK.*V:$/s, 'default empty value');
+like(http_get('/test?sub=1&var=bar&a=qq'), qr/200 OK.*DONE$/s, 'value set');
+
+###############################################################################

new file mode 100644
--- /dev/null
+++ b/stream_js_var.t
@@ -0,0 +1,75 @@
+#!/usr/bin/perl
+
+# (C) Dmitry Volyntsev
+# (C) Nginx, Inc.
+
+# Tests for stream njs module, js_var directive.
+
+###############################################################################
+
+use warnings;
+use strict;
+
+use Test::More;
+
+BEGIN { use FindBin; chdir($FindBin::Bin); }
+
+use lib 'lib';
+use Test::Nginx;
+use Test::Nginx::Stream qw/ stream /;
+
+###############################################################################
+
+select STDERR; $| = 1;
+select STDOUT; $| = 1;
+
+my $t = Test::Nginx->new()->has(qw/stream stream_return/)
+	->write_file_expand('nginx.conf', <<'EOF');
+
+%%TEST_GLOBALS%%
+
+daemon off;
+
+events {
+}
+
+stream {
+    %%TEST_GLOBALS_STREAM%%
+
+    js_import test.js;
+
+    js_var $foo;
+    js_var $bar a:$remote_addr;
+    js_set $var test.varr;
+
+    server {
+        listen  127.0.0.1:8081;
+        return  $bar$foo;
+    }
+
+    server {
+        listen  127.0.0.1:8082;
+        return  $var$foo;
+    }
+}
+
+EOF
+
+$t->write_file('test.js', <<EOF);
+    function varr(s) {
+        s.variables.foo = 'xxx';
+        return '';
+    }
+
+    export default {varr};
+EOF
+
+$t->try_run('no stream js_var')->plan(2);
+
+###############################################################################
+
+is(stream('127.0.0.1:' . port(8081))->io('###'), 'a:127.0.0.1',
+	'default value');
+is(stream('127.0.0.1:' . port(8082))->io('###'), 'xxx', 'value set');
+
+###############################################################################