diff --git a/nucypher/blockchain/eth/actors.py b/nucypher/blockchain/eth/actors.py
index 6cabc6950..b0329e2a8 100644
--- a/nucypher/blockchain/eth/actors.py
+++ b/nucypher/blockchain/eth/actors.py
@@ -629,9 +629,9 @@ class Worker(NucypherTokenActor):
             if check_active_worker and not len(self.stakes):
                 raise self.DetachedWorker(f"{self.__worker_address} is not bonded to {self.checksum_address}.")
 
-            self.period_tracker = work_tracker or WorkTracker(worker=self)
+            self.work_tracker = work_tracker or WorkTracker(worker=self)
             if start_working_now:
-                self.period_tracker.start(act_now=False)
+                self.work_tracker.start(act_now=False)
 
     @property
     def last_active_period(self) -> int:
diff --git a/nucypher/network/nodes.py b/nucypher/network/nodes.py
index 3d0712929..b377996db 100644
--- a/nucypher/network/nodes.py
+++ b/nucypher/network/nodes.py
@@ -1069,9 +1069,9 @@ class Teacher:
 
     def verify_node(self,
                     network_middleware,
-                    certificate_filepath: str = None,
-                    force: bool = False,
                     registry: BaseContractRegistry = None,
+                    certificate_filepath: str = None,
+                    force: bool = False
                     ) -> bool:
         """
         Three things happening here:
diff --git a/tests/blockchain/eth/entities/actors/test_worker.py b/tests/blockchain/eth/entities/actors/test_worker.py
index 329c6aaac..f767875fe 100644
--- a/tests/blockchain/eth/entities/actors/test_worker.py
+++ b/tests/blockchain/eth/entities/actors/test_worker.py
@@ -46,7 +46,7 @@ def test_worker_auto_confirmations(testerchain,
     def start():
         # Start running the worker
         start_pytest_ursula_services(ursula=ursula)
-        ursula.period_tracker.start()
+        ursula.work_tracker.start()
 
     def time_travel(_):
         testerchain.time_travel(periods=1)