new file mode 100644
--- /dev/null
+++ b/ssi.t
@@ -0,0 +1,74 @@
+#!/usr/bin/perl
+
+# (C) Maxim Dounin
+
+# Tests for nginx ssi module.
+
+###############################################################################
+
+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 $t = Test::Nginx->new()->plan(9);
+
+$t->write_file_expand('nginx.conf', <<'EOF');
+
+master_process off;
+daemon         off;
+
+events {
+}
+
+http {
+    access_log    off;
+    root          %%TESTDIR%%;
+
+    client_body_temp_path  %%TESTDIR%%/client_body_temp;
+    fastcgi_temp_path      %%TESTDIR%%/fastcgi_temp;
+    proxy_temp_path        %%TESTDIR%%/proxy_temp;
+
+    server {
+        listen       127.0.0.1:8080;
+        server_name  localhost;
+        ssi on;
+    }
+}
+
+EOF
+
+$t->write_file('test1.html', 'X<!--#echo var="arg_test" -->X');
+$t->write_file('test2.html',
+	'X<!--#include virtual="/test1.html?test=test" -->X');
+$t->write_file('test3.html',
+	'X<!--#set var="blah" value="test" --><!--#echo var="blah" -->X');
+
+$t->run();
+
+###############################################################################
+
+like(http_get('/test1.html'), qr/^X\(none\)X$/m, 'echo no argument');
+like(http_get('/test1.html?test='), qr/^XX$/m, 'empty argument');
+like(http_get('/test1.html?test=test'), qr/^XtestX$/m, 'argument');
+like(http_get('/test1.html?test=test&a=b'), qr/^XtestX$/m, 'argument 2');
+like(http_get('/test1.html?a=b&test=test'), qr/^XtestX$/m, 'argument 3');
+like(http_get('/test1.html?a=b&test=test&d=c'), qr/^XtestX$/m, 'argument 4');
+like(http_get('/test1.html?atest=a&testb=b&ctestc=c&test=test'), qr/^XtestX$/m,
+	'argument 5');
+
+like(http_get('/test2.html'), qr/^XXtestXX$/m, 'argument via include');
+
+like(http_get('/test3.html'), qr/^XtestX$/m, 'set');
+
+###############################################################################