Custom Test

Custom tests are fully configurable: each subtest defines its own DNS records (A, AAAA, HTTPS), per-record network delays, QUIC/TLS handshake delays, and Alt-Svc header overrides. This makes it possible to reproduce specific Happy Eyeballs scenarios precisely.

If a test ID is included in the URL (?testid=…), that configuration is loaded directly. Otherwise, publicly shared configurations are listed below — select one to run it, or enter a test ID manually.

To create your own custom test configuration, please contact us and then use the test builder. All saved configurations (including their visibility settings) can be managed in the overview.