diff --git a/src/internal/poll/fd_windows_test.go b/src/internal/poll/fd_windows_test.go
index 772008293e..6c7604fd74 100644
--- a/src/internal/poll/fd_windows_test.go
+++ b/src/internal/poll/fd_windows_test.go
@@ -20,77 +20,6 @@ func init() {
 	poll.InitWSA()
 }
 
-// checkFileIsNotPartOfNetpoll verifies that f is not managed by netpoll.
-func checkFileIsNotPartOfNetpoll(t *testing.T, f *os.File) {
-	t.Helper()
-	sc, err := f.SyscallConn()
-	if err != nil {
-		t.Fatal(err)
-	}
-	if err := sc.Control(func(fd uintptr) {
-		// Only try to associate the file with an IOCP if the handle is opened for overlapped I/O,
-		// else the association will always fail.
-		overlapped, err := windows.IsNonblock(syscall.Handle(fd))
-		if err != nil {
-			t.Fatalf("%v fd=%v: %v", f.Name(), fd, err)
-		}
-		if overlapped {
-			// If the file is part of netpoll, then associating it with another IOCP should fail.
-			if _, err := windows.CreateIoCompletionPort(syscall.Handle(fd), 0, 0, 1); err != nil {
-				t.Fatalf("%v fd=%v: is part of netpoll, but should not be: %v", f.Name(), fd, err)
-			}
-		}
-	}); err != nil {
-		t.Fatalf("%v fd=%v: is not initialized", f.Name(), f.Fd())
-	}
-}
-
-func TestFileFdsAreInitialised(t *testing.T) {
-	t.Parallel()
-	exe, err := os.Executable()
-	if err != nil {
-		t.Fatal(err)
-	}
-	f, err := os.Open(exe)
-	if err != nil {
-		t.Fatal(err)
-	}
-	defer f.Close()
-
-	checkFileIsNotPartOfNetpoll(t, f)
-}
-
-func TestSerialFdsAreInitialised(t *testing.T) {
-	t.Parallel()
-	for _, name := range []string{"COM1", "COM2", "COM3", "COM4"} {
-		t.Run(name, func(t *testing.T) {
-			t.Parallel()
-			h, err := syscall.CreateFile(syscall.StringToUTF16Ptr(name),
-				syscall.GENERIC_READ|syscall.GENERIC_WRITE,
-				0,
-				nil,
-				syscall.OPEN_EXISTING,
-				syscall.FILE_ATTRIBUTE_NORMAL|syscall.FILE_FLAG_OVERLAPPED,
-				0)
-			if err != nil {
-				if errno, ok := err.(syscall.Errno); ok {
-					switch errno {
-					case syscall.ERROR_FILE_NOT_FOUND,
-						syscall.ERROR_ACCESS_DENIED:
-						t.Log("Skipping: ", err)
-						return
-					}
-				}
-				t.Fatal(err)
-			}
-			f := os.NewFile(uintptr(h), name)
-			defer f.Close()
-
-			checkFileIsNotPartOfNetpoll(t, f)
-		})
-	}
-}
-
 func TestWSASocketConflict(t *testing.T) {
 	t.Parallel()
 	s, err := windows.WSASocket(syscall.AF_INET, syscall.SOCK_STREAM, syscall.IPPROTO_TCP, nil, 0, windows.WSA_FLAG_OVERLAPPED)