bpo-43921: Cleanup test_ssl.test_wrong_cert_tls13() (GH-26520)

Don't catch OSError, and check the SSLError message.

1 files changed, 5 insertions, 12 deletions

diff --git a/Lib/test/test_ssl.py b/Lib/test/test_ssl.py
index 85ad8ae..fdf5f19 100644
--- a/Lib/test/test_ssl.py
+++ b/Lib/test/test_ssl.py
@@ -3192,23 +3192,16 @@ class ThreadedTests(unittest.TestCase):
              client_context.wrap_socket(socket.socket(),
                                         server_hostname=hostname,
                                         suppress_ragged_eofs=False) as s:
-            # TLS 1.3 perform client cert exchange after handshake
             s.connect((HOST, server.port))
-            try:
+            with self.assertRaisesRegex(
+                ssl.SSLError,
+                'alert unknown ca|EOF occurred'
+            ):
+                # TLS 1.3 perform client cert exchange after handshake
                 s.write(b'data')
                 s.read(1000)
                 s.write(b'should have failed already')
                 s.read(1000)
-            except ssl.SSLError as e:
-                if support.verbose:
-                    sys.stdout.write("\nSSLError is %r\n" % e)
-            except OSError as e:
-                if e.errno != errno.ECONNRESET:
-                    raise
-                if support.verbose:
-                    sys.stdout.write("\nsocket.error is %r\n" % e)
-            else:
-                self.fail("Use of invalid cert should have failed!")
 
     def test_rude_shutdown(self):
         """A brutal shutdown of an SSL server should raise an OSError