diff --git a/Lib/test/support.py b/Lib/test/support.py
--- a/Lib/test/support.py
+++ b/Lib/test/support.py
@@ -43,7 +43,7 @@ __all__ = [
     "findfile", "create_empty_file", "sortdict", "check_syntax_error", "open_urlresource",
     "check_warnings", "CleanImport", "EnvironmentVarGuard", "TransientResource",
     "captured_stdout", "captured_stdin", "captured_stderr", "time_out",
-    "socket_peer_reset", "ioerror_peer_reset", "run_with_locale", 'temp_umask',
+    "socket_peer_reset", "ioerror_peer_reset", "transient_errors", "run_with_locale", 'temp_umask',
     "transient_internet", "set_memlimit", "bigmemtest", "bigaddrspacetest",
     "BasicTestRunner", "run_unittest", "run_doctest", "threading_setup",
     "threading_cleanup", "reap_children", "cpython_only", "check_impl_detail",
@@ -896,18 +896,21 @@ time_out = TransientResource(IOError, er
 socket_peer_reset = TransientResource(socket.error, errno=errno.ECONNRESET)
 ioerror_peer_reset = TransientResource(IOError, errno=errno.ECONNRESET)
 
+transient_errors = tuple(
+    getattr(errno, name, num)
+    for (name, num) in (
+        ('ECONNREFUSED', 111),
+        ('ECONNRESET', 104),
+        ('EHOSTUNREACH', 113),
+        ('ENETUNREACH', 101),
+        ('ETIMEDOUT', 110),
+    )
+)
 
 @contextlib.contextmanager
 def transient_internet(resource_name, *, timeout=30.0, errnos=()):
     """Return a context manager that raises ResourceDenied when various issues
     with the Internet connection manifest themselves as exceptions."""
-    default_errnos = [
-        ('ECONNREFUSED', 111),
-        ('ECONNRESET', 104),
-        ('EHOSTUNREACH', 113),
-        ('ENETUNREACH', 101),
-        ('ETIMEDOUT', 110),
-    ]
     default_gai_errnos = [
         ('EAI_NONAME', -2),
         ('EAI_NODATA', -5),
@@ -919,8 +922,7 @@ def transient_internet(resource_name, *,
     captured_errnos = errnos
     gai_errnos = []
     if not captured_errnos:
-        captured_errnos = [getattr(errno, name, num)
-                           for (name, num) in default_errnos]
+        captured_errnos = transient_errors
         gai_errnos = [getattr(socket, name, num)
                       for (name, num) in default_gai_errnos]
 
diff --git a/Lib/test/test_ssl.py b/Lib/test/test_ssl.py
--- a/Lib/test/test_ssl.py
+++ b/Lib/test/test_ssl.py
@@ -492,7 +492,11 @@ class NetworkedTests(unittest.TestCase):
                                 cert_reqs=ssl.CERT_REQUIRED,
                                 ca_certs=SVN_PYTHON_ORG_ROOT_CERT)
             try:
-                self.assertEqual(0, s.connect_ex(("svn.python.org", 443)))
+                err = s.connect_ex(("svn.python.org", 443))
+                if err in support.transient_errors:
+                    self.skipTest("fail to connect to svn.python.org "
+                                  "(errno %s)" % err)
+                self.assertEqual(err, 0)
                 self.assertTrue(s.getpeercert())
             finally:
                 s.close()