diff --git a/tests/system/test_system.py b/tests/system/test_system.py
index 4898dc061..36a0516c8 100644
--- a/tests/system/test_system.py
+++ b/tests/system/test_system.py
@@ -58,7 +58,7 @@ def _bad_copy(bad_request):
 retry_429 = RetryErrors(exceptions.TooManyRequests, max_tries=6)
 retry_429_harder = RetryErrors(exceptions.TooManyRequests, max_tries=10)
 retry_429_503 = RetryErrors(
-    [exceptions.TooManyRequests, exceptions.ServiceUnavailable], max_tries=6
+    [exceptions.TooManyRequests, exceptions.ServiceUnavailable], max_tries=10
 )
 retry_bad_copy = RetryErrors(exceptions.BadRequest, error_predicate=_bad_copy)