rely on pycurl error code instead of changeable string

landscape/client/broker/tests/test_transport.py

@@ -193,16 +193,10 @@ def test_ssl_verification_negative(self):
             message_api=b"X.Y",
         )
 
-        def got_result(ignored):
+        def got_result(failure):
             self.assertIs(r.request, None)
             self.assertIs(r.content, None)
-            logfile_value = self.logfile.getvalue()
-            # pycurl error messages vary by version.
-            # First is for <= noble, second for > noble.
-            self.assertTrue(
-                "server certificate verification failed" in logfile_value
-                or "SSL certificate problem" in logfile_value,
-            )
+            self.assertEqual(failure.value.error_code, 60)
 
         result.addErrback(got_result)
         return result