diff --git a/tests/test_client.py b/tests/test_client.py
index 6fab49e..d02b315 100644
--- a/tests/test_client.py
+++ b/tests/test_client.py
@@ -340,7 +340,7 @@ def send_request_and_expect_retry(self, client, timeout, min_attempt_number):
 
     def test_retry_network_failure(self):
         http_retry = HTTPRetry(stop=stop_after_delay(self.DEFAULT_TIMEOUT))
-        client = get_client(host='http://unknown-domain.com',
+        client = get_client(host='http://invalid-domain.deepomatic.com',
                             http_retry=http_retry)
         last_attempt = self.send_request_and_expect_retry(client, self.DEFAULT_TIMEOUT,
                                                           self.DEFAULT_MIN_ATTEMPT_NUMBER)