[2025/02/27 08:13:02.830] FAILURE: AssertionError: '$clusterTime' not found in OpMsg({"ismaster": 1, "helloOk": true, "$db": "admin"}, namespace="admin") ()
 [2025/02/27 08:13:02.830] self = <test_cluster_time.TestClusterTime testMethod=test_monitor>
 [2025/02/27 08:13:02.830]     def test_monitor(self):
 [2025/02/27 08:13:02.830]         cluster_time = Timestamp(0, 0)
 [2025/02/27 08:13:02.830]         reply = {
 [2025/02/27 08:13:02.830]             "minWireVersion": 0,
 [2025/02/27 08:13:02.830]             "maxWireVersion": MIN_SUPPORTED_WIRE_VERSION,
 [2025/02/27 08:13:02.830]             "$clusterTime": {"clusterTime": cluster_time},
 [2025/02/27 08:13:02.830]         }
 [2025/02/27 08:13:02.830]     
 [2025/02/27 08:13:02.830]         server = MockupDB()
 [2025/02/27 08:13:02.830]         server.run()
 [2025/02/27 08:13:02.830]         self.addCleanup(server.stop)
 [2025/02/27 08:13:02.830]     
 [2025/02/27 08:13:02.830]         client = self.simple_client(server.uri, heartbeatFrequencyMS=500)
 [2025/02/27 08:13:02.830]     
 [2025/02/27 08:13:02.830]         request = server.receives("ismaster")
 [2025/02/27 08:13:02.830]         # No $clusterTime in first ismaster, only in subsequent ones
 [2025/02/27 08:13:02.830]         self.assertNotIn("$clusterTime", request)
 [2025/02/27 08:13:02.830]         request.ok(reply)
 [2025/02/27 08:13:02.830]     
 [2025/02/27 08:13:02.830]         # Next exchange: client returns first clusterTime, we send the second.
 [2025/02/27 08:13:02.830]         request = server.receives("ismaster")
 [2025/02/27 08:13:02.830] >       self.assertIn("$clusterTime", request)
 [2025/02/27 08:13:02.830] E       AssertionError: '$clusterTime' not found in OpMsg({"ismaster": 1, "helloOk": true, "$db": "admin"}, namespace="admin")
 [2025/02/27 08:13:02.830] test/mockupdb/test_cluster_time.py:133: AssertionError