diff --git a/redis/cluster.py b/redis/cluster.py
index 4c7113712d..97e6028cbb 100644
--- a/redis/cluster.py
+++ b/redis/cluster.py
@@ -157,6 +157,7 @@ def parse_cluster_myshardid(resp, **options):
     "ssl_cert_reqs",
     "ssl_keyfile",
     "ssl_password",
+    "timeout",  # added timeout to support injecting BlockingConnectionPool timeout
     "unix_socket_path",
     "username",
 )