diff --git a/tests/test_crawler.py b/tests/test_crawler.py
index 4e9ef7740..e2a14be55 100644
--- a/tests/test_crawler.py
+++ b/tests/test_crawler.py
@@ -23,6 +23,8 @@ from scrapy.utils.test import get_crawler
 from scrapy.extensions.throttle import AutoThrottle
 from scrapy.extensions import telnet
 from scrapy.utils.test import get_testenv
+from pkg_resources import parse_version
+from w3lib import __version__ as w3lib_version
 
 from tests.mockserver import MockServer
 
@@ -378,6 +380,8 @@ class CrawlerProcessSubprocess(ScriptRunnerMixin, unittest.TestCase):
         self.assertIn('Spider closed (finished)', log)
         self.assertIn("Using reactor: twisted.internet.asyncioreactor.AsyncioSelectorReactor", log)
 
+    @mark.skipif(parse_version(w3lib_version) >= parse_version("2.0.0"),
+                 reason='w3lib 2.0.0 and later do not allow invalid domains.')
     def test_ipv6_default_name_resolver(self):
         log = self.run_script('default_name_resolver.py')
         self.assertIn('Spider closed (finished)', log)
diff --git a/tests/test_spider.py b/tests/test_spider.py
index 689349999..e1527620f 100644
--- a/tests/test_spider.py
+++ b/tests/test_spider.py
@@ -22,6 +22,7 @@ from scrapy.spiders import (
 from scrapy.linkextractors import LinkExtractor
 from scrapy.utils.test import get_crawler
 from tests import get_testdata
+from w3lib.url import safe_url_string
 
 
 class SpiderTest(unittest.TestCase):
@@ -361,9 +362,9 @@ class CrawlSpiderTest(SpiderTest):
         self.assertEqual(len(output), 3)
         self.assertTrue(all(map(lambda r: isinstance(r, Request), output)))
         self.assertEqual([r.url for r in output],
-                         ['http://EXAMPLE.ORG/SOMEPAGE/ITEM/12.HTML',
-                          'http://EXAMPLE.ORG/ABOUT.HTML',
-                          'http://EXAMPLE.ORG/NOFOLLOW.HTML'])
+                         [safe_url_string('http://EXAMPLE.ORG/SOMEPAGE/ITEM/12.HTML'),
+                          safe_url_string('http://EXAMPLE.ORG/ABOUT.HTML'),
+                          safe_url_string('http://EXAMPLE.ORG/NOFOLLOW.HTML')])
 
     def test_process_request_instance_method_with_response(self):