diff --git a/test/test_load_balancer.py b/test/test_load_balancer.py
index 378ae33e0..728b4e567 100644
--- a/test/test_load_balancer.py
+++ b/test/test_load_balancer.py
@@ -122,6 +122,8 @@ class TestLB(IntegrationTest):
         session = client.start_session()
         session.start_transaction()
         client.test_session_gc.test.find_one({}, session=session)
+        # Cleanup the transaction left open on the server.
+        self.addCleanup(self.client.admin.command, "killSessions", [session.session_id])
         if client_context.load_balancer:
             self.assertEqual(pool.active_sockets, 1)  # Pinned.
 
diff --git a/test/test_read_concern.py b/test/test_read_concern.py
index 3a1c8f3a5..2230f2bef 100644
--- a/test/test_read_concern.py
+++ b/test/test_read_concern.py
@@ -20,7 +20,7 @@ import unittest
 sys.path[0:0] = [""]
 
 from test import IntegrationTest, client_context
-from test.utils import OvertCommandListener, rs_or_single_client, single_client
+from test.utils import OvertCommandListener, rs_or_single_client
 
 from bson.son import SON
 from pymongo.errors import OperationFailure
@@ -35,7 +35,7 @@ class TestReadConcern(IntegrationTest):
     def setUpClass(cls):
         super(TestReadConcern, cls).setUpClass()
         cls.listener = OvertCommandListener()
-        cls.client = single_client(event_listeners=[cls.listener])
+        cls.client = rs_or_single_client(event_listeners=[cls.listener])
         cls.db = cls.client.pymongo_test
         client_context.client.pymongo_test.create_collection("coll")