if err != nil {
			t.Fatal(err)
		}
		defer w.Close()
		stdout, stderr := runTerminalPassthrough(t, r, w)
		if !stdout {
			t.Errorf("stdout is not a terminal")
		}
		if !stderr {
			t.Errorf("stderr is not a terminal")
		}
	})
}

func runTerminalPassthrough(t *testing.T, r, w *os.File) (stdout, stderr bool) {
	cmd := testenv.Command(t, testGo, "test", "-run=^$")