A bunch of cmd/go script tests make use of the external network (usually for fetching modules, or testing VCS integration). This was more necessary in the past but we migrated the serving of a lot of modules/packages used for tests from a public vcs-test.golang.org server to a server started locally alongside the tests in #27494. There has been a tail of tests that we haven't converted yet but most of them are able to be converted, with a handful that fundamentally need the external network. We should convert the ones that can be converted and sequester the rest in our cmd/go/internal/verylongtest package of shame.
A bunch of cmd/go script tests make use of the external network (usually for fetching modules, or testing VCS integration). This was more necessary in the past but we migrated the serving of a lot of modules/packages used for tests from a public vcs-test.golang.org server to a server started locally alongside the tests in #27494. There has been a tail of tests that we haven't converted yet but most of them are able to be converted, with a handful that fundamentally need the external network. We should convert the ones that can be converted and sequester the rest in our cmd/go/internal/verylongtest package of shame.