diff --git a/stream_upstream_zone.t b/stream_upstream_zone.t
index 77a99d9..edb4096 100644
--- a/stream_upstream_zone.t
+++ b/stream_upstream_zone.t
@@ -76,8 +76,8 @@
 
 my $p = port(8081);
 
-stream('127.0.0.1:' . port(8091));
-stream("127.0.0.1:" . port(8092));
+stream('127.0.0.1:' . port(8091))->read();
+stream("127.0.0.1:" . port(8092))->read();
 
 $t->stop();