new file mode 100644
--- /dev/null
+++ b/gzip.t
@@ -0,0 +1,89 @@
+#!/usr/bin/perl
+
+# (C) Maxim Dounin
+
+# Tests for nginx gzip filter module.
+
+###############################################################################
+
+use warnings;
+use strict;
+
+use Test::More;
+
+BEGIN { use FindBin; chdir($FindBin::Bin); }
+
+use lib 'lib';
+use Test::Nginx qw/ :DEFAULT :gzip /;
+
+###############################################################################
+
+select STDERR; $| = 1;
+select STDOUT; $| = 1;
+
+my $t = Test::Nginx->new()->plan(6);
+
+$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;
+        location / {
+            gzip on;
+        }
+        location /proxy/ {
+            gzip on;
+            proxy_pass http://127.0.0.1:8080/local/;
+        }
+        location /local/ {
+            gzip off;
+            alias %%TESTDIR%%/;
+        }
+    }
+}
+
+EOF
+
+$t->write_file('index.html', 'X' x 64);
+
+$t->run();
+
+###############################################################################
+
+my $r;
+
+$r = http_gzip_request('/');
+like($r, qr/^Content-Encoding: gzip/m, 'gzip');
+http_gzip_like($r, qr/^X{64}\Z/, 'gzip content correct');
+
+$r = http_gzip_request('/proxy/');
+like($r, qr/^Content-Encoding: gzip/m, 'gzip proxied');
+http_gzip_like($r, qr/^X{64}\Z/, 'gzip proxied content');
+
+# Accept-Ranges headers should be cleared
+
+unlike(http_gzip_request('/'), qr/Accept-Ranges/im, 'cleared accept-ranges');
+
+TODO: {
+local $TODO = 'broken since 0.7.44';
+
+unlike(http_gzip_request('/proxy/'), qr/Accept-Ranges/im,
+	'cleared headers from proxy');
+
+}
+
+###############################################################################

--- a/lib/Test/Nginx.pm
+++ b/lib/Test/Nginx.pm
@@ -12,6 +12,10 @@ use strict;
 use base qw/ Exporter /;
 
 our @EXPORT = qw/ log_in log_out http http_get http_head /;
+our @EXPORT_OK = qw/ http_gzip_request http_gzip_like /;
+our %EXPORT_TAGS = (
+	gzip => [ qw/ http_gzip_request http_gzip_like / ]
+);
 
 ###############################################################################
 
@@ -275,6 +279,61 @@ sub http($;%) {
 
 ###############################################################################
 
+sub http_gzip_request {
+	my ($url) = @_;
+	my $r = http(<<EOF);
+GET $url HTTP/1.1
+Host: localhost
+Connection: close
+Accept-Encoding: gzip
+
+EOF
+}
+
+sub http_content {
+	my ($text) = @_;
+
+	return undef if !defined $text;
+
+	if ($text !~ /(.*?)\x0d\x0a?\x0d\x0a?(.*)/ms) {
+		return undef;
+	}
+
+	my ($headers, $body) = ($1, $2);
+
+	if ($headers !~ /Transfer-Encoding: chunked/i) {
+		return $body;
+	}
+
+	my $content = '';
+	while ($body =~ /\G\x0d?\x0a?([0-9a-f]+)\x0d\x0a?/gcmsi) {
+		my $len = hex($1);
+		$content .= substr($body, pos($body), $len);
+		pos($body) += $len;
+	}
+
+	return $content;
+}
+
+sub http_gzip_like {
+	my ($text, $re, $name) = @_;
+
+	SKIP: {
+		eval { require IO::Uncompress::Gunzip; };
+		Test::More->builder->skip(
+			"IO::Uncompress::Gunzip not installed", 1) if $@;
+
+		my $in = http_content($text);
+		my $out;
+
+		IO::Uncompress::Gunzip::gunzip(\$in => \$out);
+
+		Test::More->builder->like($out, $re, $name);
+	}
+}
+
+###############################################################################
+
 1;
 
 ###############################################################################

--- a/ssi-include-big.t
+++ b/ssi-include-big.t
@@ -14,7 +14,7 @@ use Test::More;
 BEGIN { use FindBin; chdir($FindBin::Bin); }
 
 use lib 'lib';
-use Test::Nginx;
+use Test::Nginx qw/ :DEFAULT :gzip /;
 
 ###############################################################################
 
@@ -90,59 +90,4 @@ my $t4 = http_gzip_request('/test4.html'
 ok(defined $t4, 'big ssi main file');
 http_gzip_like($t4, qr/^X{1025}\Z/, 'big ssi main file content');
 
-
 ###############################################################################
-
-sub http_gzip_request {
-	my ($url) = @_;
-	my $r = http(<<EOF);
-GET $url HTTP/1.1
-Host: localhost
-Connection: close
-Accept-Encoding: gzip
-
-EOF
-}
-
-sub http_content {
-	my ($text) = @_;
-
-	return undef if !defined $text;
-
-	if ($text !~ /(.*?)\x0d\x0a?\x0d\x0a?(.*)/ms) {
-		return undef;
-	}
-
-	my ($headers, $body) = ($1, $2);
-
-	if ($headers !~ /Transfer-Encoding: chunked/i) {
-		return $body;
-	}
-
-	my $content = '';
-	while ($body =~ /\G\x0d?\x0a?([0-9a-f]+)\x0d\x0a?/gcmsi) {
-		my $len = hex($1);
-		$content .= substr($body, pos($body), $len);
-		pos($body) += $len;
-	}
-
-	return $content;
-}
-
-sub http_gzip_like {
-	my ($text, $re, $name) = @_;
-
-	SKIP: {
-		eval { require IO::Uncompress::Gunzip; };
-		skip "IO::Uncompress::Gunzip not installed", 1 if $@;
-
-		my $in = http_content($text);
-		my $out;
-
-		IO::Uncompress::Gunzip::gunzip(\$in => \$out);
-
-		like($out, $re, $name);
-	}
-}
-
-###############################################################################