diff --git a/tests/files/nginx.default.conf b/tests/files/nginx.default.conf
index f394eab..b163551 100644
--- a/tests/files/nginx.default.conf
+++ b/tests/files/nginx.default.conf
@@ -3,6 +3,7 @@ ssl_certificate_key /root/certs/foobar.key;
 
 server {
     listen       80;
+    listen       [::]:80;
     server_name  localhost;
 
     location / {