What version of Go are you using (go version)?

$ go version
go version devel go1.22-36091d82f6 Fri Jul 21 16:04:09 2023 +0200 darwin/arm64

Does this issue reproduce with the latest release?

Yes

What did you do?

Run the go test -v -args -x -v example from go help testflag.

For instance, the command

go test -v -args -x -v

will compile the test binary and then run it as

pkg.test -test.v -x -v

What did you expect to see?

no error

What did you see instead?

Go(1) prints flag provided but not defined: -x with exit status 2.