Unable to benchmark IPv6-only localhost

[WGH-]

I have a webserver bound to [::1]:8080.

When I use the following plan:

---
base: 'http://localhost:8080'
iterations: 1000
concurrency: 10

plan:
- name: aaa
  request:
    url: /aaa.txt

All I get is connection refused errors. curl http://localhost:8080/aaa.txt works. Judging by strace, it doesn't even try to connect to ::1.

If I use http://[::1]:8080 as base, it works fine (which is a workaround).