diff --git a/scrapy/core/downloader/handlers/ftp.py b/scrapy/core/downloader/handlers/ftp.py
index 1398140b4..933bc7e8d 100644
--- a/scrapy/core/downloader/handlers/ftp.py
+++ b/scrapy/core/downloader/handlers/ftp.py
@@ -39,12 +39,13 @@ from twisted.internet.protocol import Protocol, ClientCreator
 from scrapy.http import Response
 from scrapy.responsetypes import responsetypes
 from scrapy.utils.httpobj import urlparse_cached
+from scrapy.utils.python import to_bytes
 
 
 class ReceivedDataProtocol(Protocol):
     def __init__(self, filename=None):
         self.__filename = filename
-        self.body = open(filename, "w") if filename else BytesIO()
+        self.body = open(filename, "wb") if filename else BytesIO()
         self.size = 0
 
     def dataReceived(self, data):
@@ -97,7 +98,7 @@ class FTPDownloadHandler(object):
         protocol.close()
         body = protocol.filename or protocol.body.read()
         headers = {"local filename": protocol.filename or '', "size": protocol.size}
-        return respcls(url=request.url, status=200, body=body, headers=headers)
+        return respcls(url=request.url, status=200, body=to_bytes(body), headers=headers)
 
     def _failed(self, result, request):
         message = result.getErrorMessage()
@@ -106,6 +107,6 @@ class FTPDownloadHandler(object):
             if m:
                 ftpcode = m.group()
                 httpcode = self.CODE_MAPPING.get(ftpcode, self.CODE_MAPPING["default"])
-                return Response(url=request.url, status=httpcode, body=message)
+                return Response(url=request.url, status=httpcode, body=to_bytes(message))
         raise result.type(result.value)
 
diff --git a/tests/py3-ignores.txt b/tests/py3-ignores.txt
index ec2947003..313e74ec9 100644
--- a/tests/py3-ignores.txt
+++ b/tests/py3-ignores.txt
@@ -1,13 +1,6 @@
 tests/test_linkextractors_deprecated.py
 tests/test_proxy_connect.py
 
-scrapy/xlib/tx/iweb.py
-scrapy/xlib/tx/interfaces.py
-scrapy/xlib/tx/endpoints.py
-scrapy/xlib/tx/client.py
-scrapy/xlib/tx/_newclient.py
-scrapy/xlib/tx/__init__.py
-scrapy/core/downloader/handlers/ftp.py
 scrapy/linkextractors/sgml.py
 scrapy/linkextractors/regex.py
 scrapy/linkextractors/htmlparser.py
diff --git a/tests/test_downloader_handlers.py b/tests/test_downloader_handlers.py
index c1683fb3e..e49a514b8 100644
--- a/tests/test_downloader_handlers.py
+++ b/tests/test_downloader_handlers.py
@@ -687,9 +687,6 @@ class BaseFTPTestCase(unittest.TestCase):
     password = "passwd"
     req_meta = {"ftp_user": username, "ftp_password": password}
 
-    if six.PY3:
-        skip = "Twisted missing ftp support for PY3"
-
     def setUp(self):
         from twisted.protocols.ftp import FTPRealm, FTPFactory
         from scrapy.core.downloader.handlers.ftp import FTPDownloadHandler
@@ -700,8 +697,8 @@ class BaseFTPTestCase(unittest.TestCase):
         userdir = os.path.join(self.directory, self.username)
         os.mkdir(userdir)
         fp = FilePath(userdir)
-        fp.child('file.txt').setContent("I have the power!")
-        fp.child('file with spaces.txt').setContent("Moooooooooo power!")
+        fp.child('file.txt').setContent(b"I have the power!")
+        fp.child('file with spaces.txt').setContent(b"Moooooooooo power!")
 
         # setup server
         realm = FTPRealm(anonymousRoot=self.directory, userHome=self.directory)
@@ -736,8 +733,8 @@ class BaseFTPTestCase(unittest.TestCase):
 
         def _test(r):
             self.assertEqual(r.status, 200)
-            self.assertEqual(r.body, 'I have the power!')
-            self.assertEqual(r.headers, {'Local Filename': [''], 'Size': ['17']})
+            self.assertEqual(r.body, b'I have the power!')
+            self.assertEqual(r.headers, {b'Local Filename': [b''], b'Size': [b'17']})
         return self._add_test_callbacks(d, _test)
 
     def test_ftp_download_path_with_spaces(self):
@@ -749,8 +746,8 @@ class BaseFTPTestCase(unittest.TestCase):
 
         def _test(r):
             self.assertEqual(r.status, 200)
-            self.assertEqual(r.body, 'Moooooooooo power!')
-            self.assertEqual(r.headers, {'Local Filename': [''], 'Size': ['18']})
+            self.assertEqual(r.body, b'Moooooooooo power!')
+            self.assertEqual(r.headers, {b'Local Filename': [b''], b'Size': [b'18']})
         return self._add_test_callbacks(d, _test)
 
     def test_ftp_download_notexist(self):
@@ -763,7 +760,7 @@ class BaseFTPTestCase(unittest.TestCase):
         return self._add_test_callbacks(d, _test)
 
     def test_ftp_local_filename(self):
-        local_fname = "/tmp/file.txt"
+        local_fname = b"/tmp/file.txt"
         meta = {"ftp_local_filename": local_fname}
         meta.update(self.req_meta)
         request = Request(url="ftp://127.0.0.1:%s/file.txt" % self.portNum,
@@ -772,10 +769,10 @@ class BaseFTPTestCase(unittest.TestCase):
 
         def _test(r):
             self.assertEqual(r.body, local_fname)
-            self.assertEqual(r.headers, {'Local Filename': ['/tmp/file.txt'], 'Size': ['17']})
+            self.assertEqual(r.headers, {b'Local Filename': [b'/tmp/file.txt'], b'Size': [b'17']})
             self.assertTrue(os.path.exists(local_fname))
-            with open(local_fname) as f:
-                self.assertEqual(f.read(), "I have the power!")
+            with open(local_fname, "rb") as f:
+                self.assertEqual(f.read(), b"I have the power!")
             os.remove(local_fname)
         return self._add_test_callbacks(d, _test)
 
@@ -810,8 +807,8 @@ class AnonymousFTPTestCase(BaseFTPTestCase):
         os.mkdir(self.directory)
 
         fp = FilePath(self.directory)
-        fp.child('file.txt').setContent("I have the power!")
-        fp.child('file with spaces.txt').setContent("Moooooooooo power!")
+        fp.child('file.txt').setContent(b"I have the power!")
+        fp.child('file with spaces.txt').setContent(b"Moooooooooo power!")
 
         # setup server for anonymous access
         realm = FTPRealm(anonymousRoot=self.directory)