diff --git a/test/nginx.conf b/test/nginx.conf
index c4add6ac..3c9c07d0 100644
--- a/test/nginx.conf
+++ b/test/nginx.conf
@@ -4,7 +4,7 @@ events {
 
 http {
   server {
-    listen 8081;
+    listen [::]:8081 ipv6only=off;
 
     location ~ ^/_matrix/client/(r0|v3)/rooms/([^/]*)/report/(.*)$ {
       # Abuse reports should be sent to Mjölnir.