diff --git a/test/test_cluster_spec.py b/test/test_cluster_spec.py
index <HASH>..<HASH> 100644
--- a/test/test_cluster_spec.py
+++ b/test/test_cluster_spec.py
@@ -91,8 +91,7 @@ def create_mock_cluster(uri, monitor_class=MockMonitor):
         parsed_uri['nodelist'],
         set_name=set_name,
         pool_class=MockPool,
-        monitor_class=monitor_class,
-        heartbeat_frequency=99999999)
+        monitor_class=monitor_class)
 
     c = Cluster(cluster_settings)
     c.open()
PYTHON-<I> Fix test_cluster_spec.

After rebasing, ClusterSettings should no longer take a "heartbeat_frequency" argument.