diff --git a/h2.t b/h2.t
index 07dbf2f..a664d5c 100644
--- a/h2.t
+++ b/h2.t
@@ -852,6 +852,7 @@
 SKIP: {
 skip 'unsafe socket tests', 4 unless $ENV{TEST_NGINX_UNSAFE};
 
+$s = Test::Nginx::HTTP2->new();
 $sid = $s->new_stream({ path => '/tbig.html' });
 
 $s->h2_window(2**30, $sid);