diff --git a/nixos/tests/shadowsocks/common.nix b/nixos/tests/shadowsocks/common.nix
index 8cbbc3f20684..82a63771b03a 100644
--- a/nixos/tests/shadowsocks/common.nix
+++ b/nixos/tests/shadowsocks/common.nix
@@ -69,6 +69,7 @@ import ../make-test-python.nix ({ pkgs, lib, ... }: {
       start_all()
 
       server.wait_for_unit("shadowsocks-libev.service")
+      server.wait_for_unit("nginx.service")
       client.wait_for_unit("shadowsocks-client.service")
 
       client.fail(