Merge pull request #4519 from Gallaecio/test-ubuntu-bionic

Test the latest Ubuntu along the latest Python

.travis.yml

@@ -27,10 +27,13 @@ matrix:
       python: 3.7
     - env: TOXENV=py PYPI_RELEASE_JOB=true
       python: 3.8
+      dist: bionic
     - env: TOXENV=extra-deps
       python: 3.8
+      dist: bionic
     - env: TOXENV=asyncio
       python: 3.8
+      dist: bionic
 install:
   - |
       if [ "$TOXENV" = "pypy3" ]; then

tests/test_crawler.py

@@ -311,14 +311,7 @@ class CrawlerProcessSubprocess(ScriptRunnerMixin, unittest.TestCase):
     def test_ipv6_alternative_name_resolver(self):
         log = self.run_script('alternative_name_resolver.py')
         self.assertIn('Spider closed (finished)', log)
-        self.assertTrue(any([
-            "twisted.internet.error.ConnectionRefusedError" in log,
-            "twisted.internet.error.ConnectError" in log,
-        ]))
-        self.assertTrue(any([
-            "'downloader/exception_type_count/twisted.internet.error.ConnectionRefusedError': 1," in log,
-            "'downloader/exception_type_count/twisted.internet.error.ConnectError': 1," in log,
-        ]))
+        self.assertNotIn("twisted.internet.error.DNSLookupError", log)
 
     def test_reactor_select(self):
         log = self.run_script("twisted_reactor_select.py")