Does not use HTTP/2 for all of its resources

HTTP/2 serves your page's resources faster and with less data moving over the wire.

How the Lighthouse HTTP/2 audit fails

Lighthouse lists all resources not served over HTTP/2:

Lighthouse audit shows resources not served over HTTP/2

Lighthouse gathers all resources requested by the page and checks the HTTP protocol version of each. There are some cases where non-HTTP/2 requests will be ignored in the audit results. See the implementation for more details.

How to pass this audit

Serve your resources over HTTP/2.

To learn how to enable HTTP/2 on your servers, see Setting up HTTP/2.