// NonblockingPipe is the test name for nonblockingPipe.
	r, w, errno := runtime.NonblockingPipe()
	if errno != 0 {
		t.Fatal(syscall.Errno(errno))
	}
	defer runtime.Close(w)

	checkIsPipe(t, r, w)
	checkNonblocking(t, r, "reader")
	checkCloseonexec(t, r, "reader")
	checkNonblocking(t, w, "writer")
	checkCloseonexec(t, w, "writer")

	// Test that fcntl returns an error as expected.