new file mode 100644
--- /dev/null
+++ b/xslt_params.t
@@ -0,0 +1,107 @@
+#!/usr/bin/perl
+
+# (C) Maxim Dounin
+
+# Tests for nginx xslt filter 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 $t = Test::Nginx->new()->has(qw/http xslt/);
+
+$t->write_file_expand('nginx.conf', <<'EOF');
+
+%%TEST_GLOBALS%%
+
+daemon         off;
+
+events {
+}
+
+http {
+    %%TEST_GLOBALS_HTTP%%
+
+    server {
+        listen       127.0.0.1:8080;
+        server_name  localhost;
+
+        default_type text/xml;
+
+        location /x1 {
+            xslt_stylesheet %%TESTDIR%%/test.xslt
+                            param1='value1':param2=root param3='value%33';
+        }
+        location /x2 {
+            xslt_stylesheet %%TESTDIR%%/test.xslt;
+            xslt_param param1 "'value1'";
+            xslt_param param2 "root";
+            xslt_string_param param3 "value3";
+        }
+        location /x3 {
+            xslt_stylesheet %%TESTDIR%%/test.xslt
+                            param1='value1':param2=root;
+            xslt_string_param param3 "value3";
+        }
+    }
+}
+
+EOF
+
+$t->write_file('test.xslt', <<'EOF');
+
+<xsl:stylesheet version="1.0"
+                xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
+
+<xsl:output method="html"/>
+
+<xsl:param name="param1"/>
+<xsl:param name="param2"/>
+<xsl:param name="param3"/>
+
+<xsl:template match="/">
+param1=<xsl:value-of select="$param1"/>
+param2=<xsl:value-of select="$param2"/>
+param3=<xsl:value-of select="$param3"/>
+</xsl:template>
+
+</xsl:stylesheet>
+
+EOF
+
+$t->write_file('x1', '<root>data</root>');
+$t->write_file('x2', '<root>data</root>');
+$t->write_file('x3', '<root>data</root>');
+
+eval {
+	open OLDERR, ">&", \*STDERR; close STDERR;
+	$t->run();
+	open STDERR, ">&", \*OLDERR;
+};
+
+plan(skip_all => 'no xslt_param') if $@;
+$t->plan(3);
+
+###############################################################################
+
+like(http_get("/x1"), qr!200 OK.*param1=value1.*param2=data.*param3=value3!ms,
+	'params from xslt_stylesheet');
+like(http_get("/x2"), qr!200 OK.*param1=value1.*param2=data.*param3=value3!ms,
+	'params from xslt_param/xslt_string_param');
+like(http_get("/x3"), qr!200 OK.*param1=value1.*param2=data.*param3=value3!ms,
+	'mixed');
+
+###############################################################################