diff --git a/pytest.ini b/pytest.ini
index 0e4ee9ed1..db5bee228 100644
--- a/pytest.ini
+++ b/pytest.ini
@@ -10,7 +10,7 @@ flake8-ignore =
     extras/qpsclient.py E501 E261 E501
     # scrapy/commands
     scrapy/commands/__init__.py E128 E501
-    scrapy/commands/check.py F401 E501 W391
+    scrapy/commands/check.py F401 E501
     scrapy/commands/crawl.py E501
     scrapy/commands/edit.py E501
     scrapy/commands/fetch.py E401 E302 E501 E128 E502 E731
@@ -20,8 +20,8 @@ flake8-ignore =
     scrapy/commands/runspider.py E501
     scrapy/commands/settings.py E302 E128
     scrapy/commands/shell.py E128 E501 E502
-    scrapy/commands/startproject.py E502 E127 E501 E128 W391
-    scrapy/commands/version.py E501 E128 W391
+    scrapy/commands/startproject.py E502 E127 E501 E128
+    scrapy/commands/version.py E501 E128
     scrapy/commands/view.py F401 E302
     # scrapy/contracts
     scrapy/contracts/__init__.py E501 W504
@@ -29,15 +29,15 @@ flake8-ignore =
     # scrapy/core
     scrapy/core/engine.py E261 E501 E128 E127 E306 E502
     scrapy/core/scheduler.py E501
-    scrapy/core/scraper.py E501 E306 E261 E128 W391 W504
+    scrapy/core/scraper.py E501 E306 E261 E128 W504
     scrapy/core/spidermw.py E501 E731 E502 E231 E126 E226
     scrapy/core/downloader/__init__.py F401 E501
     scrapy/core/downloader/contextfactory.py E501 E128 E126
     scrapy/core/downloader/middleware.py E501 E502
     scrapy/core/downloader/tls.py E501 E305 E241
-    scrapy/core/downloader/webclient.py E731 E501 E261 E502 E128 W391 E126 E226
+    scrapy/core/downloader/webclient.py E731 E501 E261 E502 E128 E126 E226
     scrapy/core/downloader/handlers/__init__.py E501
-    scrapy/core/downloader/handlers/ftp.py E501 E305 E128 E127 W391
+    scrapy/core/downloader/handlers/ftp.py E501 E305 E128 E127
     scrapy/core/downloader/handlers/http.py F401
     scrapy/core/downloader/handlers/http10.py E501
     scrapy/core/downloader/handlers/http11.py E501
@@ -66,7 +66,6 @@ flake8-ignore =
     scrapy/http/__init__.py F401
     scrapy/http/common.py E501
     scrapy/http/cookies.py E501
-    scrapy/http/headers.py W391
     scrapy/http/request/__init__.py E501
     scrapy/http/request/form.py E501 E123
     scrapy/http/request/json_request.py E501
@@ -101,8 +100,7 @@ flake8-ignore =
     # scrapy/spiders
     scrapy/spiders/__init__.py F401 E501 E402
     scrapy/spiders/crawl.py E501
-    scrapy/spiders/feed.py E501 E261 W391
-    scrapy/spiders/init.py W391
+    scrapy/spiders/feed.py E501 E261
     scrapy/spiders/sitemap.py E501
     # scrapy/utils
     scrapy/utils/benchserver.py E501
@@ -118,7 +116,7 @@ flake8-ignore =
     scrapy/utils/engine.py F401 E261 E302
     scrapy/utils/ftp.py E302
     scrapy/utils/gz.py E305 E501 E302 W504
-    scrapy/utils/http.py F403 F401 W391 E226
+    scrapy/utils/http.py F403 F401 E226
     scrapy/utils/httpobj.py E302 E501
     scrapy/utils/iterators.py E501 E701
     scrapy/utils/job.py E302
@@ -148,9 +146,9 @@ flake8-ignore =
     scrapy/exceptions.py E302 E501
     scrapy/exporters.py E501 E261 E226
     scrapy/extension.py E302
-    scrapy/interfaces.py E302 E501 W391
+    scrapy/interfaces.py E302 E501
     scrapy/item.py E501 E128
-    scrapy/link.py E501 W391
+    scrapy/link.py E501
     scrapy/logformatter.py E501 W293
     scrapy/mail.py E402 E128 E501 E502
     scrapy/middleware.py E502 E128 E501
@@ -162,7 +160,7 @@ flake8-ignore =
     scrapy/signalmanager.py E501
     scrapy/spiderloader.py E225 F841 E501 E126
     scrapy/squeues.py E128
-    scrapy/statscollectors.py E501 W391
+    scrapy/statscollectors.py E501
     # tests
     tests/__init__.py F401 E402 E501
     tests/mockserver.py E401 E501 E126 E123 F401
@@ -218,20 +216,18 @@ flake8-ignore =
     tests/test_selector.py F401 E501 E127
     tests/test_spider.py E501 F401
     tests/test_spidermiddleware.py E501 E226
-    tests/test_spidermiddleware_depth.py W391
     tests/test_spidermiddleware_httperror.py E128 E501 E127 E121
     tests/test_spidermiddleware_offsite.py E302 E501 E128 E111 W293
     tests/test_spidermiddleware_output_chain.py F401 E501 E302 W293 E226
-    tests/test_spidermiddleware_referer.py F401 E501 E302 F841 E125 E201 E261 E124 E501 W391 E241 E121
-    tests/test_spidermiddleware_urllength.py W391
+    tests/test_spidermiddleware_referer.py F401 E501 E302 F841 E125 E201 E261 E124 E501 E241 E121
     tests/test_squeues.py E501 E302 E701 E741
     tests/test_utils_conf.py E501 E231 E303 E128
     tests/test_utils_console.py E302 E231
     tests/test_utils_curl.py E501
-    tests/test_utils_datatypes.py E402 E501 E305 W391
+    tests/test_utils_datatypes.py E402 E501 E305
     tests/test_utils_defer.py E306 E261 E501 E302 F841 E226
     tests/test_utils_deprecate.py F841 E306 E501
-    tests/test_utils_http.py E302 E501 E502 E128 W391 W504
+    tests/test_utils_http.py E302 E501 E502 E128 W504
     tests/test_utils_httpobj.py E302
     tests/test_utils_iterators.py E501 E128 E129 E302 E303 E241
     tests/test_utils_log.py E741 E226
@@ -241,15 +237,14 @@ flake8-ignore =
     tests/test_utils_response.py E501
     tests/test_utils_signal.py E741 F841 E302 E731 E226
     tests/test_utils_sitemap.py E302 E128 E501 E124
-    tests/test_utils_spider.py E261 E302 E305 W391
+    tests/test_utils_spider.py E261 E302 E305
     tests/test_utils_template.py E305
     tests/test_utils_url.py F401 E501 E127 E302 E305 E211 E125 E501 E226 E241 E126 E123
     tests/test_webclient.py E501 E128 E122 E303 E402 E306 E226 E241 E123 E126
     tests/mocks/dummydbm.py E302
     tests/test_cmdline/__init__.py E502 E501
-    tests/test_cmdline/extensions.py E302 W391
+    tests/test_cmdline/extensions.py E302
     tests/test_settings/__init__.py F401 E501 E128
-    tests/test_settings/default_settings.py W391
     tests/test_spiderloader/__init__.py E128 E501 E302
     tests/test_spiderloader/test_spiders/spider0.py E302
     tests/test_spiderloader/test_spiders/spider1.py E302
diff --git a/scrapy/commands/check.py b/scrapy/commands/check.py
index ab73e85e7..3e6c11b7d 100644
--- a/scrapy/commands/check.py
+++ b/scrapy/commands/check.py
@@ -96,4 +96,3 @@ class Command(ScrapyCommand):
             result.printErrors()
             result.printSummary(start, stop)
             self.exitcode = int(not result.wasSuccessful())
-
diff --git a/scrapy/commands/startproject.py b/scrapy/commands/startproject.py
index 67337c26e..3b9f6eabb 100644
--- a/scrapy/commands/startproject.py
+++ b/scrapy/commands/startproject.py
@@ -119,4 +119,3 @@ class Command(ScrapyCommand):
         _templates_base_dir = self.settings['TEMPLATES_DIR'] or \
             join(scrapy.__path__[0], 'templates')
         return join(_templates_base_dir, 'project')
-
diff --git a/scrapy/commands/version.py b/scrapy/commands/version.py
index 577365c3b..8651948f7 100644
--- a/scrapy/commands/version.py
+++ b/scrapy/commands/version.py
@@ -30,4 +30,3 @@ class Command(ScrapyCommand):
                 print(patt % (name, version))
         else:
             print("Scrapy %s" % scrapy.__version__)
-
diff --git a/scrapy/core/downloader/handlers/ftp.py b/scrapy/core/downloader/handlers/ftp.py
index 806a537d4..39ed67a1a 100644
--- a/scrapy/core/downloader/handlers/ftp.py
+++ b/scrapy/core/downloader/handlers/ftp.py
@@ -112,4 +112,3 @@ class FTPDownloadHandler(object):
                 httpcode = self.CODE_MAPPING.get(ftpcode, self.CODE_MAPPING["default"])
                 return Response(url=request.url, status=httpcode, body=to_bytes(message))
         raise result.type(result.value)
-
diff --git a/scrapy/core/downloader/webclient.py b/scrapy/core/downloader/webclient.py
index 3a5890ed0..3fe13414a 100644
--- a/scrapy/core/downloader/webclient.py
+++ b/scrapy/core/downloader/webclient.py
@@ -157,4 +157,3 @@ class ScrapyHTTPClientFactory(HTTPClientFactory):
     def gotHeaders(self, headers):
         self.headers_time = time()
         self.response_headers = headers
-
diff --git a/scrapy/core/scraper.py b/scrapy/core/scraper.py
index 1f389cf2e..40de6b87a 100644
--- a/scrapy/core/scraper.py
+++ b/scrapy/core/scraper.py
@@ -244,4 +244,3 @@ class Scraper(object):
             return self.signals.send_catch_log_deferred(
                 signal=signals.item_scraped, item=output, response=response,
                 spider=spider)
-
diff --git a/scrapy/http/headers.py b/scrapy/http/headers.py
index 62507eb19..f3b46b994 100644
--- a/scrapy/http/headers.py
+++ b/scrapy/http/headers.py
@@ -91,5 +91,3 @@ class Headers(CaselessDict):
     def __copy__(self):
         return self.__class__(self)
     copy = __copy__
-
-
diff --git a/scrapy/interfaces.py b/scrapy/interfaces.py
index 89ad2b14f..d48babc3c 100644
--- a/scrapy/interfaces.py
+++ b/scrapy/interfaces.py
@@ -15,4 +15,3 @@ class ISpiderLoader(Interface):
 
     def find_by_request(request):
         """Return the list of spiders names that can handle the given request"""
-
diff --git a/scrapy/link.py b/scrapy/link.py
index 2c8301680..f0638ced2 100644
--- a/scrapy/link.py
+++ b/scrapy/link.py
@@ -39,4 +39,3 @@ class Link(object):
     def __repr__(self):
         return 'Link(url=%r, text=%r, fragment=%r, nofollow=%r)' % \
             (self.url, self.text, self.fragment, self.nofollow)
-
diff --git a/scrapy/spiders/feed.py b/scrapy/spiders/feed.py
index 06e212e1c..197812a26 100644
--- a/scrapy/spiders/feed.py
+++ b/scrapy/spiders/feed.py
@@ -133,4 +133,3 @@ class CSVFeedSpider(Spider):
             raise NotConfigured('You must define parse_row method in order to scrape this CSV feed')
         response = self.adapt_response(response)
         return self.parse_rows(response)
-
diff --git a/scrapy/spiders/init.py b/scrapy/spiders/init.py
index 2efb1a869..fd41133ea 100644
--- a/scrapy/spiders/init.py
+++ b/scrapy/spiders/init.py
@@ -29,4 +29,3 @@ class InitSpider(Spider):
         spider
         """
         return self.initialized()
-
diff --git a/scrapy/statscollectors.py b/scrapy/statscollectors.py
index 6da9ddcd2..f0bfaed34 100644
--- a/scrapy/statscollectors.py
+++ b/scrapy/statscollectors.py
@@ -80,5 +80,3 @@ class DummyStatsCollector(StatsCollector):
 
     def min_value(self, key, value, spider=None):
         pass
-
-
diff --git a/scrapy/utils/http.py b/scrapy/utils/http.py
index b6e05c862..ad49ef3e9 100644
--- a/scrapy/utils/http.py
+++ b/scrapy/utils/http.py
@@ -34,4 +34,3 @@ def decode_chunked_transfer(chunked_body):
         body += t[:size]
         t = t[size+2:]
     return body
-
diff --git a/tests/test_cmdline/extensions.py b/tests/test_cmdline/extensions.py
index 72867eb56..28456b55d 100644
--- a/tests/test_cmdline/extensions.py
+++ b/tests/test_cmdline/extensions.py
@@ -12,4 +12,3 @@ class TestExtension(object):
 
 class DummyExtension(object):
     pass
-
diff --git a/tests/test_settings/default_settings.py b/tests/test_settings/default_settings.py
index c24b5a9b9..26a555275 100644
--- a/tests/test_settings/default_settings.py
+++ b/tests/test_settings/default_settings.py
@@ -2,4 +2,3 @@
 TEST_DEFAULT = 'defvalue'
 
 TEST_DICT = {'key': 'val'}
-
diff --git a/tests/test_spidermiddleware_depth.py b/tests/test_spidermiddleware_depth.py
index 3685d5a6f..71cca2472 100644
--- a/tests/test_spidermiddleware_depth.py
+++ b/tests/test_spidermiddleware_depth.py
@@ -40,4 +40,3 @@ class TestDepthMiddleware(TestCase):
 
     def tearDown(self):
         self.stats.close_spider(self.spider, '')
-
diff --git a/tests/test_spidermiddleware_urllength.py b/tests/test_spidermiddleware_urllength.py
index a0aae0fdd..5ef2b23fd 100644
--- a/tests/test_spidermiddleware_urllength.py
+++ b/tests/test_spidermiddleware_urllength.py
@@ -18,4 +18,3 @@ class TestUrlLengthMiddleware(TestCase):
         spider = Spider('foo')
         out = list(mw.process_spider_output(res, reqs, spider))
         self.assertEqual(out, [short_url_req])
-
diff --git a/tests/test_utils_datatypes.py b/tests/test_utils_datatypes.py
index 535095b8d..9455172fa 100644
--- a/tests/test_utils_datatypes.py
+++ b/tests/test_utils_datatypes.py
@@ -244,4 +244,3 @@ class SequenceExcludeTest(unittest.TestCase):
 
 if __name__ == "__main__":
     unittest.main()
-
diff --git a/tests/test_utils_http.py b/tests/test_utils_http.py
index 583105673..2524153ea 100644
--- a/tests/test_utils_http.py
+++ b/tests/test_utils_http.py
@@ -16,5 +16,3 @@ class ChunkedTest(unittest.TestCase):
             "This is the data in the first chunk\r\n" +
             "and this is the second one\r\n" +
             "consequence")
-
-
diff --git a/tests/test_utils_spider.py b/tests/test_utils_spider.py
index 045e72117..d9de1ce77 100644
--- a/tests/test_utils_spider.py
+++ b/tests/test_utils_spider.py
@@ -34,4 +34,3 @@ class UtilsSpidersTestCase(unittest.TestCase):
 
 if __name__ == "__main__":
     unittest.main()
-